Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
570
FNUS56 KPDT 172104
FWFPDT
Fire Weather Planning Forecast for NE Oregon and SE Washington
National Weather Service Pendleton OR
204 PM PDT Sun Aug 17 2025
.DISCUSSION...Isolated thunderstorms (10-20% chance) will develop
this afternoon across the eastern mountains. A slight chance
(15-20%) of showers will develop overnight for the Columbia Basin
and portions of the eastern mountains. A drying and warming trend
will develop Monday through the week as high pressure builds over
the region, with a return to widespread low relative humidities by
Thursday. A low (10-15%) chance of an isolated thunderstorm or
two will develop Monday afternoon over Wallowa county.
***Thunderstorms imply strong gusty winds***
***Winds are 20 foot 10 minute averages***
***CWR-chance of wetting rain 0.10 or greater***
***Ventilation Index is derived from the
transport wind multiplied by the mixing
height in 100`s of feet. Index categories
are a generalized indicator and users are
encourage to develop criteria that are
suitable and representative of dispersion
conditions in their local area of interest.***
Note: Max transport winds may not occur
at the same time as max mixing height.
WAZ695-181130-
East Washington South Central Cascade Mountains-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy.
* Min temperature.....46-54.
* Max humidity........70-85 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (81-213) decreasing to poor
(25-87) after midnight.
.MONDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....70-79...except 61-69 ridges.
* Min humidity........32-47 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 2 to 6
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 2 to 6
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor (39-153) increasing to fair to good
(290-516) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Partly cloudy.
* Min temperature.....46-53.
* Max humidity........69-84 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (81-249) decreasing to poor
(25-111) after midnight.
.TUESDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....72-81...except 63-72 ridges.
* Min humidity........31-46 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 5 mph.
* Ridges/upr slopes....West winds 1 to 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor (25-99) increasing to fair (216-378) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 47 to 54. Highs 63 to 77.
Northwest winds 2 to 7 mph.
.THURSDAY...Mostly clear. Lows 45 to 51. Highs 69 to 82.
Northwest winds 2 to 7 mph.
.FRIDAY...Clear. Lows 51 to 57. Highs 75 to 88. Northeast winds
1 to 5 mph.
.SATURDAY...Clear. Lows 55 to 60. Highs 78 to 91. Terrain driven
winds less than 5 mph.
.SUNDAY...Clear. Lows 55 to 62. Highs 75 to 89. Northwest winds
1 to 6 mph.
$$
WAZ690-181130-
Kittitas Valley-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy.
* Min temperature.....55-62.
* Max humidity........59-74 percent.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 6 mph.
* Ridges/upr slopes....Northwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest around 10 mph.
* Ventilation Index...Poor to fair (149-279) decreasing to poor
(27-85) after midnight.
.MONDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....79-87...except 69-82 ridges.
* Min humidity........24-33 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph.
* Ridges/upr slopes....Southwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor (58-154) increasing to good to excellent
(525-727) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....53-59.
* Max humidity........58-73 percent.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 4 to 9 mph.
* Ridges/upr slopes....Northwest winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 15 mph.
* Ventilation Index...Poor to fair (181-353) decreasing to poor
(31-125) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....82-89...except 72-84 ridges.
* Min humidity........23-31 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph.
* Ridges/upr slopes....Northwest winds 4 to 9 mph in the morning
becoming light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor (32-116) increasing to fair (279-397) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 55 to 60. Highs 79 to 87.
Northwest winds 4 to 10 mph.
.THURSDAY...Mostly clear. Lows 52 to 58. Highs 81 to 88.
Northwest winds 5 to 11 mph.
.FRIDAY...Clear. Lows 56 to 63. Highs 86 to 93. North winds 2 to
7 mph.
.SATURDAY...Clear. Lows 59 to 66. Highs 90 to 97. North winds
2 to 7 mph.
.SUNDAY...Clear. Lows 62 to 67. Highs 89 to 96. Northwest winds
3 to 8 mph.
$$
WAZ694-181130-
Yakama Alpine District-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers
after midnight.
* Min temperature.....47-56.
* Max humidity........65-80 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (121-235) decreasing to poor
(25-66) after midnight.
.MONDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....72-81...except 64-74 ridges.
* Min humidity........24-38 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 3
to 8 mph in the afternoon.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Poor (60-140) increasing to fair to good
(415-691) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....46-53.
* Max humidity........62-77 percent.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Poor to fair (133-275) decreasing to poor
(25-73) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-85...except 67-79 ridges.
* Min humidity........22-37 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 1
to 5 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 1
to 5 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Poor (25-54) increasing to fair (260-404) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 47 to 54. Highs 70 to 83. West
winds 2 to 7 mph.
.THURSDAY...Mostly clear. Lows 47 to 54. Highs 74 to 87.
Northwest winds 2 to 7 mph.
.FRIDAY...Clear. Lows 53 to 59. Highs 80 to 93. Northeast winds
1 to 6 mph.
.SATURDAY...Clear. Lows 57 to 63. Highs 83 to 96. Northeast winds
1 to 5 mph.
.SUNDAY...Clear. Lows 57 to 63. Highs 80 to 93. West winds 1 to
5 mph.
$$
ORZ691-WAZ691-181130-
Lower Columbia Basin of Oregon-Lower Columbia Basin of Washington-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers
after midnight.
* Min temperature.....57-62.
* Max humidity........56-70 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (95-237) decreasing to poor
(25-61) after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....79-88.
* Min humidity........26-35 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 3 to 8 mph.
* Ridges/upr slopes....West winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9000 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor (42-142) increasing to fair to good
(326-554) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....54-60.
* Max humidity........55-70 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph.
* Ridges/upr slopes....West winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Poor to fair (176-326) decreasing to poor
(25-77) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....83-90.
* Min humidity........21-27 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 6 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....Southwest around 10 mph.
* Ventilation Index...Poor (26-94) increasing to poor to fair
(199-317) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Clear. Lows 55 to 61. Highs 82 to 89. West winds
4 to 9 mph.
.THURSDAY...Clear. Lows 54 to 59. Highs 85 to 90. West winds 3 to
8 mph.
.FRIDAY...Clear. Lows 56 to 61. Highs 90 to 97. Northeast winds
2 to 7 mph.
.SATURDAY...Clear. Lows 59 to 65. Highs 93 to 99. North winds
2 to 7 mph.
.SUNDAY...Mostly clear. Lows 61 to 66. Highs 91 to 98. West winds
2 to 7 mph.
$$
ORZ692-WAZ692-181130-
Northern Blue Mountains of Oregon-Blue Mountains of Washington-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy. A
slight chance of showers and thunderstorms after midnight.
* Min temperature.....51-59.
* Max humidity........62-77 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....North around 5 mph shifting to the east after
midnight.
* Ventilation Index...Poor (43-127) decreasing to poor (25-51)
after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....77-86...except 70-77 ridges.
* Min humidity........31-39 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2
to 5 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 2 to 5
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (27-83) increasing to fair (218-484) in
the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....50-59.
* Max humidity........57-72 percent.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Northwest winds 2 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Poor (70-168) decreasing to poor (25-58)
after midnight.
.TUESDAY...
* Sky/weather.........Sunny.
* Max temperature.....78-88...except 73-79 ridges.
* Min humidity........25-33 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....West around 5 mph.
* Ventilation Index...Poor (25-50) increasing to poor to fair
(140-274) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 50 to 59. Highs 73 to 84. West
winds 2 to 7 mph.
.THURSDAY...Mostly clear. Lows 49 to 57. Highs 76 to 86. West
winds 2 to 7 mph.
.FRIDAY...Clear. Lows 51 to 59. Highs 82 to 93. Northeast winds
1 to 6 mph.
.SATURDAY...Mostly clear. Lows 57 to 64. Highs 84 to 95. West
winds 1 to 6 mph.
.SUNDAY...Mostly clear. Lows 58 to 65. Highs 83 to 93. West winds
1 to 6 mph.
$$
ORZ693-WAZ693-181130-
Canyon Grasslands of Wallowa County-
Southeast Washington Grande Ronde Valley-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy. A
slight chance of showers and thunderstorms after midnight.
* Min temperature.....52-61.
* Max humidity........67-82 percent...except 59-69 percent ridges.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....North around 5 mph shifting to the east after
midnight.
* Ventilation Index...Poor (47-137) decreasing to poor (25-55)
after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....81-90...except 76-82 ridges.
* Min humidity........26-34 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2
to 5 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 2 to 7
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......12000 ft agl.
* Transport winds.....Southwest around 5 mph increasing to around
15 mph in the afternoon.
* Ventilation Index...Poor (25-89) increasing to fair to excellent
(409-899) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....51-61.
* Max humidity........63-78 percent...except 55-66 percent ridges.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Northwest winds 3 to 6 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Poor to fair (80-214) decreasing to poor
(25-64) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....83-92...except 78-85 ridges.
* Min humidity........22-28 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......12500 ft agl.
* Transport winds.....Northeast around 5 mph shifting to the south
in the afternoon.
* Ventilation Index...Poor (25-53) increasing to poor to fair
(97-437) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 50 to 61. Highs 79 to 88.
Northwest winds 1 to 6 mph.
.THURSDAY...Clear. Lows 48 to 59. Highs 80 to 89. West winds 2 to
7 mph.
.FRIDAY...Clear. Lows 50 to 59. Highs 86 to 95. Northeast winds
2 to 7 mph.
.SATURDAY...Mostly clear. Lows 54 to 63. Highs 89 to 98. East
winds 1 to 6 mph.
.SUNDAY...Mostly clear. Lows 57 to 66. Highs 86 to 96. West winds
1 to 6 mph.
$$
ORZ701-181130-
Eastern Columbia River Gorge of Oregon-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers
after midnight.
* Min temperature.....52-59.
* Max humidity........72-87 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Winds northwest winds 2 to 7 mph.
* Ridges/upr slopes....Northwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (170-296) decreasing to poor
(28-122) after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....76-81.
* Min humidity........34-47 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 7 mph...except
northwest 4 to 9 mph in the eastern Columbia River Gorge.
* Ridges/upr slopes....Northwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Poor (52-190) increasing to fair to good
(392-592) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....49-55.
* Max humidity........68-83 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph.
* Ridges/upr slopes....West winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Poor to fair (199-361) decreasing to poor
(27-103) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....80-85.
* Min humidity........27-38 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1
to 6 mph in the afternoon. In the eastern Columbia River
Gorge, west winds 2 to 7 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Poor (25-99) increasing to fair (229-375) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 52 to 58. Highs 79 to 84. West
winds 3 to 8 mph.
.THURSDAY...Clear. Lows 51 to 56. Highs 84 to 89. West winds 4 to
9 mph.
.FRIDAY...Clear. Lows 57 to 62. Highs 90 to 95. Northeast winds
1 to 6 mph.
.SATURDAY...Clear. Lows 60 to 65. Highs 92 to 97. North winds
1 to 5 mph.
.SUNDAY...Clear. Lows 60 to 65. Highs 89 to 94. Northwest winds
2 to 7 mph.
$$
ORZ702-181130-
East Slopes of the Mt. Hood National Forest-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy.
* Min temperature.....47-55.
* Max humidity........73-88 percent.
* Humidity recovery...Good...except Excellent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (94-222) decreasing to poor
(25-76) after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....74-82...except 67-76 ridges.
* Min humidity........35-50 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....Southwest 10 to 15 mph.
* Ventilation Index...Poor (35-113) increasing to fair (286-486) in
the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....46-53.
* Max humidity........62-77 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Poor to fair (110-282) decreasing to poor
(25-67) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....79-85...except 71-80 ridges.
* Min humidity........27-40 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (25-43) increasing to fair (202-308) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 47 to 55. Highs 69 to 83. West
winds 1 to 5 mph.
.THURSDAY...Clear. Lows 47 to 54. Highs 75 to 87. Northwest winds
up to 5 mph.
.FRIDAY...Clear. Lows 54 to 62. Highs 80 to 93. Terrain driven
winds less than 5 mph.
.SATURDAY...Clear. Lows 58 to 65. Highs 82 to 95. Terrain driven
winds less than 5 mph.
.SUNDAY...Clear. Lows 55 to 63. Highs 79 to 93. Terrain driven
winds less than 5 mph.
$$
ORZ695-181130-
Eagle Cap Wilderness-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy. A
slight chance of showers and thunderstorms.
* Min temperature.....53-59...except 48-55 ridges.
* Max humidity........63-75 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....Northeast around 5 mph shifting to the
southeast after midnight.
* Ventilation Index...Poor (29-79) decreasing to poor (25-65) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-89...except 67-78 ridges.
* Min humidity........23-37 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 2
to 7 mph in the afternoon.
* Ridges/upr slopes....South winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......11500 ft agl.
* Transport winds.....South 10 to 15 mph.
* Ventilation Index...Poor (25-153) increasing to excellent
(762-1050) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....53-59...except 48-56 ridges.
* Max humidity........54-69 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 7 mph.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Poor to fair (71-211) decreasing to poor
(25-74) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....80-93...except 71-83 ridges.
* Min humidity........19-30 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph becoming southwest 2
to 5 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......12000 ft agl.
* Transport winds.....Northeast around 5 mph increasing to south
around 15 mph in the afternoon.
* Ventilation Index...Poor (25-62) increasing to fair to excellent
(357-863) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 48 to 57. Highs 70 to 85.
Northwest winds 2 to 7 mph.
.THURSDAY...Clear. Lows 46 to 55. Highs 71 to 86. Northwest winds
2 to 7 mph.
.FRIDAY...Clear. Lows 48 to 57. Highs 77 to 92. North winds 2 to
7 mph.
.SATURDAY...Mostly clear. Lows 54 to 62. Highs 78 to 93. West
winds 1 to 6 mph.
.SUNDAY...Mostly clear. Lows 54 to 63. Highs 75 to 90. West winds
1 to 6 mph.
$$
ORZ694-181130-
Grande Ronde Valley of Oregon-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy. A
slight chance of showers and thunderstorms.
* Min temperature.....52-57.
* Max humidity........75-89 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....Northwest around 5 mph.
* Ventilation Index...Poor (117-179) decreasing to poor (26-56)
after midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....86-91.
* Min humidity........27-33 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2
to 6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming north 3 to 6
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (37-69) increasing to fair to excellent
(402-788) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....50-55.
* Max humidity........68-83 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 3 to 8 mph.
* Ridges/upr slopes....Northwest winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest around 10 mph.
* Ventilation Index...Poor to fair (184-252) decreasing to poor
(54-100) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....88-93.
* Min humidity........21-26 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....Northwest winds 1 to 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....Northwest around 5 mph shifting to the
southwest in the afternoon.
* Ventilation Index...Poor (45-83) increasing to poor to fair
(159-315) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 50 to 55. Highs 83 to 88.
Northwest winds 3 to 8 mph.
.THURSDAY...Clear. Lows 49 to 54. Highs 85 to 90. Northwest winds
4 to 9 mph.
.FRIDAY...Clear. Lows 50 to 55. Highs 92 to 97. North winds 2 to
7 mph.
.SATURDAY...Mostly clear. Lows 55 to 60. Highs 93 to 98.
Northwest winds 1 to 5 mph.
.SUNDAY...Mostly clear. Lows 57 to 62. Highs 91 to 96. Northwest
winds 2 to 7 mph.
$$
ORZ699-181130-
Western Forested Blue Mountains-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of
thunderstorms in the evening. A slight chance of showers.
* Min temperature.....49-55.
* Max humidity........65-79 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....North around 10 mph shifting to the southeast
after midnight.
* Ventilation Index...Poor (46-156) decreasing to poor (25-51)
after midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....78-85...except 72-79 ridges.
* Min humidity........22-37 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....Southwest around 5 mph increasing to around
15 mph in the afternoon.
* Ventilation Index...Poor (25-77) increasing to fair to excellent
(444-962) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....48-53.
* Max humidity........65-77 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Poor to fair (85-207) decreasing to poor
(25-55) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....80-88...except 75-83 ridges.
* Min humidity........21-31 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......11000 ft agl.
* Transport winds.....North around 5 mph shifting to the southwest
in the afternoon.
* Ventilation Index...Poor (25-44) increasing to poor to good
(195-595) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 48 to 54. Highs 73 to 82.
Northwest winds 1 to 5 mph.
.THURSDAY...Clear. Lows 47 to 53. Highs 76 to 85. Northwest winds
1 to 6 mph.
.FRIDAY...Clear. Lows 50 to 56. Highs 82 to 91. Northeast winds
1 to 5 mph.
.SATURDAY...Mostly clear. Lows 55 to 60. Highs 84 to 93.
Northwest winds 1 to 6 mph.
.SUNDAY...Mostly clear. Lows 56 to 61. Highs 81 to 90. Northwest
winds 1 to 5 mph.
$$
ORZ696-181130-
John Day Valley-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of
thunderstorms in the evening. A slight chance of showers.
* Min temperature.....52-57.
* Max humidity........64-76 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Poor to fair (98-220) decreasing to poor
(25-70) after midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....80-89...except 75-80 ridges.
* Min humidity........19-30 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 1 to 5
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (25-72) increasing to fair to excellent
(478-932) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....49-55.
* Max humidity........65-78 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 5 mph.
* Ridges/upr slopes....Northwest winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Poor to fair (147-281) decreasing to poor
(25-77) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....83-91...except 78-83 ridges.
* Min humidity........17-24 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....North around 5 mph shifting to the southwest
in the afternoon.
* Ventilation Index...Poor (25-46) increasing to poor to fair
(182-426) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Clear. Lows 50 to 55. Highs 78 to 87. Northwest
winds 2 to 7 mph.
.THURSDAY...Clear. Lows 50 to 55. Highs 82 to 91. North winds
2 to 7 mph.
.FRIDAY...Clear. Lows 53 to 58. Highs 88 to 98. Northeast winds
2 to 7 mph.
.SATURDAY...Mostly clear. Lows 57 to 62. Highs 90 to 98.
Northeast winds 2 to 7 mph.
.SUNDAY...Mostly clear. Lows 58 to 63. Highs 87 to 95. North
winds 1 to 6 mph.
$$
ORZ700-181130-
Central Mountains of Oregon-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers and
thunderstorms in the evening.
* Min temperature.....45-54.
* Max humidity........72-87 percent.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Poor to fair (160-338) decreasing to poor
(25-49) after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....80-85...except 74-80 ridges.
* Min humidity........17-31 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 2 to 6
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 1
to 6 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (27-69) increasing to fair to excellent
(442-844) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....43-52.
* Max humidity........71-86 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 7 mph.
* Ridges/upr slopes....Northwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest around 10 mph.
* Ventilation Index...Poor to fair (189-365) decreasing to poor
(25-54) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....83-88...except 76-83 ridges.
* Min humidity........14-25 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (25-32) increasing to fair (209-411) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 45 to 53. Highs 79 to 85.
Northwest winds 2 to 7 mph.
.THURSDAY...Clear. Lows 45 to 53. Highs 83 to 89. North winds
2 to 7 mph.
.FRIDAY...Clear. Lows 49 to 56. Highs 89 to 95. Northeast winds
2 to 7 mph.
.SATURDAY...Mostly clear. Lows 52 to 60. Highs 90 to 95.
Northwest winds 2 to 7 mph.
.SUNDAY...Mostly clear. Lows 53 to 60. Highs 88 to 93. Northwest
winds 2 to 7 mph.
$$
ORZ703-181130-
Warm Springs Reservation-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers
after midnight.
* Min temperature.....54-59...except 49-54 ridges.
* Max humidity........67-76 percent...except 72-87 percent ridges.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 6 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (179-303) decreasing to poor
(25-77) after midnight.
.MONDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....77-85...except 65-74 ridges.
* Min humidity........27-35 percent...except 38-53 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 2 to 6
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 2 to 7
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (34-100) increasing to fair to good
(346-508) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....48-54.
* Max humidity........62-75 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 3 to 8 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Poor to fair (184-342) decreasing to poor
(25-61) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....81-88...except 70-78 ridges.
* Min humidity........23-30 percent...except 30-44 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Poor (25-38) increasing to poor to fair
(186-288) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 50 to 55. Highs 75 to 87. West
winds 2 to 7 mph.
.THURSDAY...Clear. Lows 49 to 54. Highs 81 to 90. Northwest winds
2 to 7 mph.
.FRIDAY...Clear. Lows 57 to 62. Highs 85 to 94. North winds 2 to
7 mph.
.SATURDAY...Clear. Lows 60 to 65. Highs 88 to 97. North winds
2 to 7 mph.
.SUNDAY...Clear. Lows 58 to 63. Highs 85 to 96. Northwest winds
2 to 7 mph.
$$
ORZ704-181130-
Northern Deschutes National Forest-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers and
thunderstorms in the evening.
* Min temperature.....46-52.
* Max humidity........76-91 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 6 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Poor to fair (144-298) decreasing to poor
(25-68) after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....77-82...except 64-73 ridges.
* Min humidity........31-38 percent...except 40-55 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 2 to 5
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 2 to 7
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Poor (38-110) increasing to fair to good
(321-501) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....44-50.
* Max humidity........68-83 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 6 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 3 to 8 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Poor to fair (120-282) decreasing to poor
(25-54) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....81-87...except 67-78 ridges.
* Min humidity........25-32 percent...except 32-47 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Poor (25-41) increasing to fair (205-317) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 45 to 50. Highs 70 to 84. West
winds 2 to 7 mph.
.THURSDAY...Clear. Lows 46 to 51. Highs 76 to 89. Northwest winds
2 to 7 mph.
.FRIDAY...Clear. Lows 51 to 57. Highs 80 to 93. Northeast winds
2 to 7 mph.
.SATURDAY...Mostly clear. Lows 54 to 59. Highs 82 to 96. North
winds 1 to 6 mph.
.SUNDAY...Mostly clear. Lows 54 to 59. Highs 80 to 94. Northwest
winds 1 to 6 mph.
$$
ORZ705-181130-
Southern Deschutes National Forest-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy. A
slight chance of showers and thunderstorms in the evening.
* Min temperature.....42-48.
* Max humidity........86-100 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....Northwest winds 1 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Poor to fair (150-264) decreasing to poor
(25-38) after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....76-81...except 65-75 ridges.
* Min humidity........21-36 percent...except 32-47 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 2
to 5 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 2
to 5 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8500 ft agl.
* Transport winds.....Southwest around 5 mph increasing to around
15 mph in the afternoon.
* Ventilation Index...Poor (55-105) increasing to fair to excellent
(493-757) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....39-47.
* Max humidity........82-97 percent...except 69-84 percent ridges.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Poor to fair (136-264) decreasing to poor
(25-37) after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....79-84...except 69-77 ridges.
* Min humidity........20-35 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9000 ft agl.
* Transport winds.....South 5 to 10 mph.
* Ventilation Index...Poor (25-31) increasing to fair (325-439) in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 40 to 48. Highs 72 to 82.
Northwest winds 1 to 6 mph.
.THURSDAY...Clear. Lows 41 to 49. Highs 78 to 87. Northeast winds
1 to 5 mph.
.FRIDAY...Clear. Lows 45 to 53. Highs 84 to 93. Northeast winds
1 to 6 mph.
.SATURDAY...Mostly clear. Lows 48 to 57. Highs 84 to 93. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 49 to 56. Highs 81 to 90. Northwest
winds 1 to 5 mph.
$$
ORZ697-181130-
Central Blue Mountains-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of
thunderstorms in the evening. A slight chance of showers.
* Min temperature.....47-54.
* Max humidity........70-85 percent.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....South around 5 mph.
* Ventilation Index...Poor to fair (173-273) decreasing to poor
(25-46) after midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....79-84...except 74-80 ridges.
* Min humidity........18-23 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 3
to 6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 3
to 7 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9500 ft agl.
* Transport winds.....Southwest around 10 mph increasing to around
20 mph in the afternoon.
* Ventilation Index...Poor (50-118) increasing to excellent
(934-1050) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....44-52.
* Max humidity........64-79 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Poor to fair (157-257) decreasing to poor
(25-48) after midnight.
.TUESDAY...
* Sky/weather.........Sunny.
* Max temperature.....83-88...except 78-84 ridges.
* Min humidity........16-21 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......11500 ft agl.
* Transport winds.....Northwest around 5 mph increasing to south
around 15 mph in the afternoon.
* Ventilation Index...Poor (25-38) increasing to good to excellent
(568-862) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 45 to 52. Highs 75 to 82.
Northwest winds 1 to 6 mph.
.THURSDAY...Clear. Lows 45 to 51. Highs 79 to 86. North winds
1 to 6 mph.
.FRIDAY...Clear. Lows 48 to 53. Highs 84 to 92. Terrain driven
winds less than 5 mph.
.SATURDAY...Mostly clear. Lows 52 to 59. Highs 85 to 92. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 53 to 59. Highs 81 to 89. Terrain
driven winds less than 5 mph.
$$
ORZ698-181130-
Southern Blue Mountains-
204 PM PDT Sun Aug 17 2025
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers and
thunderstorms in the evening.
* Min temperature.....47-54.
* Max humidity........69-83 percent.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......Near surface.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Fair (201-277) decreasing to poor (25-35)
after midnight.
.MONDAY...
* Sky/weather.........Partly cloudy then becoming sunny.
* Max temperature.....79-86.
* Min humidity........14-19 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 3
to 6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 3
to 6 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9000 ft agl.
* Transport winds.....Southwest around 10 mph increasing to south
around 20 mph in the afternoon.
* Ventilation Index...Poor (61-107) increasing to excellent
(934-1050) in the afternoon.
.MONDAY NIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....45-52.
* Max humidity........59-74 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Fair (208-296) decreasing to poor (25-50)
after midnight.
.TUESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....83-90.
* Min humidity........11-16 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....Northwest around 5 mph increasing to south
around 15 mph in the afternoon.
* Ventilation Index...Poor (25-39) increasing to fair to excellent
(487-737) in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 46 to 53. Highs 79 to 87.
Northwest winds 2 to 7 mph.
.THURSDAY...Clear. Lows 46 to 52. Highs 83 to 89. North winds
2 to 7 mph.
.FRIDAY...Clear. Lows 50 to 56. Highs 88 to 94. Northeast winds
1 to 5 mph.
.SATURDAY...Mostly clear. Lows 53 to 59. Highs 88 to 94. West
winds 1 to 5 mph.
.SUNDAY...Mostly clear. Lows 54 to 60. Highs 86 to 92. West winds
1 to 5 mph.
$$
.8-14 DAY OUTLOOK for Monday August 25 through Sunday August 31...
A greater chance of above normal temperatures and above normal
precipitation.
$$