Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
848
FNUS56 KPDT 191259
FWFPDT
Fire Weather Planning Forecast for NE Oregon and SE Washington
National Weather Service Pendleton OR
559 AM PDT Wed Aug 19 2026
.DISCUSSION...
Low relative humidity will be expected each day though Friday,
with winds that are light (under 10 mph) and variable. Winds
become much more significant around Friday Night and on Saturday
as an upper wave influences the region, while not as hot
temperatures temper the low relative humidity in these more
wind prone areas. At this time the need for a fire weather watch
is low as chances for dry thunder remain less than 10% based on
NBM members on Friday and no critical humidity and wind
thresholds overlap.
***Winds are 20 foot 10 minute averages ***
***CWR: Chance of wetting rain 0.10 or greater ***
***Ventilation Index is derived from transport wind
multiplied by the mixing height in 100`s of ft.
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.
Categories: low (< 200), moderate (200-500),
high (500-700), and very high (> 700).
-Note: Max transport winds may not occur
at the same time as max mixing height. ***
WAZ695-192315-
East Washington South Central Cascade Mountains-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the afternoon.
* Max temperature.....78-86...except 69-78 ridges.
* Min humidity........29-44 percent.
* 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.......6500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Low (44-88) increasing to low to moderate
(186-288) in the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy. Patchy smoke in the evening.
* Min temperature.....52-58.
* Max humidity........63-78 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds up to 5 mph.
* Ridges/upr slopes....West winds up to 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....West around 10 mph.
* Ventilation Index...Low (74-150) decreasing to low (25-41) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....82-90...except 73-81 ridges.
* Min humidity........22-34 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 becoming west 1 to 5
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9000 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (35-61) increasing to moderate (304-484)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 56 to 62. Highs 76 to 89. West
winds up to 5 mph.
.SATURDAY...Not as warm. Mostly cloudy with a chance of showers.
Lows 54 to 62. Highs 63 to 78. West winds 3 to 8 mph.
.SUNDAY...Partly cloudy with a slight chance of showers. Lows
46 to 53. Highs 63 to 76. West winds 5 to 11 mph.
.MONDAY...Mostly clear. Lows 47 to 53. Highs 68 to 81. Southwest
winds 1 to 6 mph.
.TUESDAY...Partly cloudy with a slight chance of showers. Lows
50 to 56. Highs 66 to 79. West winds 1 to 6 mph.
$$
WAZ690-192315-
Kittitas Valley-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Max temperature.....85-91...except 76-86 ridges.
* Min humidity........22-29 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph.
* Ridges/upr slopes....West winds 2 to 7 mph in the morning
becoming 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...Low (47-97) increasing to moderate (221-305)
in the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Min temperature.....59-64.
* Max humidity........50-65 percent.
* Humidity recovery...Moderate.
* 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.......500 ft agl.
* Transport winds.....Northwest around 10 mph.
* Ventilation Index...Low to moderate (141-219) decreasing to low
(37-53) after midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....89-95...except 79-89 ridges.
* Min humidity........19-24 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 5 mph in the morning
becoming upslope less than 5 mph.
* Ridges/upr slopes....Northwest winds 2 to 5 mph in the morning
becoming light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8500 ft agl.
* Transport winds.....West around 5 mph.
* Ventilation Index...Low (44-72) increasing to moderate (273-377)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 62 to 67. Highs 88 to 94. Northwest
winds up to 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 63 to
69. Highs 80 to 88. West winds 4 to 10 mph.
.SUNDAY...Mostly clear. Lows 53 to 58. Highs 76 to 84. Northwest
winds 7 to 13 mph.
.MONDAY...Mostly clear. Lows 54 to 59. Highs 80 to 87. East winds
1 to 6 mph.
.TUESDAY...Partly cloudy. Lows 57 to 63. Highs 80 to 88.
Northwest winds 2 to 7 mph.
$$
WAZ694-192315-
Yakama Alpine District-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....83-90...except 73-85 ridges.
* Min humidity........19-33 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 1
to 5 mph in the afternoon.
* Ridges/upr slopes....West winds 1 to 5 mph in the morning
becoming light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (27-57) increasing to moderate (218-282)
in the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy.
* Min temperature.....51-61.
* Max humidity........55-70 percent.
* Humidity recovery...Moderate.
* 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.......500 ft agl.
* Transport winds.....West around 5 mph.
* Ventilation Index...Low (83-123) decreasing to low (25-29) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....87-94...except 77-89 ridges.
* Min humidity........18-29 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.......8000 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-39) increasing to moderate (379-487)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 56 to 64. Highs 79 to 91. Terrain
driven winds less than 5 mph.
.SATURDAY...A chance of showers. Mostly cloudy. Lows 53 to 62.
Highs 69 to 83. West winds 4 to 9 mph.
.SUNDAY...Mostly clear. Lows 44 to 52. Highs 69 to 81. West winds
4 to 10 mph.
.MONDAY...Mostly clear. Lows 46 to 55. Highs 73 to 86. Terrain
driven winds less than 5 mph.
.TUESDAY...Partly cloudy. Lows 49 to 58. Highs 71 to 85. West
winds 2 to 7 mph.
$$
ORZ691-WAZ691-192315-
Lower Columbia Basin of Oregon-Lower Columbia Basin of Washington-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the morning.
* Max temperature.....88-93...except 83-89 ridges.
* Min humidity........14-21 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 7 mph.
* Ridges/upr slopes....Southwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6500 ft agl.
* Transport winds.....Southwest around 10 mph.
* Ventilation Index...Low (41-97) increasing to moderate (229-341)
in the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Min temperature.....58-63.
* Max humidity........46-61 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 7 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....West around 5 mph.
* Ventilation Index...Low (56-152) decreasing to low (25-39) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....90-96.
* Min humidity........16-22 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.......8500 ft agl.
* Transport winds.....West around 5 mph.
* Ventilation Index...Low (26-68) increasing to moderate (212-326)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 61 to 66. Highs 88 to 96. West
winds 1 to 6 mph.
.SATURDAY...A chance of showers. Mostly cloudy. Lows 61 to 66.
Highs 80 to 91. West winds 7 to 13 mph.
.SUNDAY...Mostly clear. Lows 52 to 57. Highs 79 to 86. West winds
8 to 14 mph.
.MONDAY...Mostly clear. Lows 53 to 58. Highs 84 to 90. Northwest
winds 2 to 7 mph.
.TUESDAY...Partly cloudy. Lows 57 to 62. Highs 83 to 90. West
winds 2 to 7 mph.
$$
ORZ692-WAZ692-192315-
Northern Blue Mountains of Oregon-Blue Mountains of Washington-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
Patchy smoke.
* Max temperature.....83-91...except 76-82 ridges.
* Min humidity........15-20 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.......7500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (37-71) increasing to moderate (270-404)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Patchy smoke.
* Min temperature.....54-63.
* Max humidity........29-42 percent.
* Humidity recovery...Poor.
* 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.......500 ft agl.
* Transport winds.....Northwest around 5 mph shifting to the south
after midnight.
* Ventilation Index...Low (44-102) decreasing to low (25) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....85-93...except 80-86 ridges.
* Min humidity........17-23 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.....North around 5 mph shifting to the west in
the afternoon.
* Ventilation Index...Low (25-33) increasing to moderate (237-369)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 57 to 66. Highs 85 to 93. Northeast
winds up to 5 mph.
.SATURDAY...A slight chance of showers and thunderstorms. Mostly
cloudy. Lows 59 to 67. Highs 77 to 87. West winds 3 to 8 mph.
.SUNDAY...A slight chance of showers. Mostly clear. Lows 48 to
57. Highs 72 to 82. West winds 3 to 8 mph.
.MONDAY...Mostly clear. Lows 48 to 56. Highs 77 to 87. Northeast
winds up to 5 mph.
.TUESDAY...Partly cloudy. Lows 52 to 61. Highs 76 to 86.
Southwest winds up to 5 mph.
$$
ORZ693-WAZ693-192315-
Canyon Grasslands of Wallowa County-
Southeast Washington Grande Ronde Valley-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
Patchy smoke.
* Max temperature.....84-93...except 79-86 ridges.
* Min humidity........10-15 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...Low (32-56) increasing to moderate to high
(422-548) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Patchy smoke.
* Min temperature.....52-63.
* Max humidity........31-46 percent.
* Humidity recovery...Poor.
* 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.......500 ft agl.
* Transport winds.....North around 5 mph shifting to the southeast
after midnight.
* Ventilation Index...Low (75-125) decreasing to low (25) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....89-97...except 83-90 ridges.
* Min humidity........12-17 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming north 1 to
5 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming north 2 to 5
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....East around 5 mph shifting to the southwest
in the afternoon.
* Ventilation Index...Low (25-28) increasing to moderate to high
(276-542) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 55 to 66. Highs 89 to 98. East
winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a chance of showers and a slight
chance of thunderstorms. Lows 57 to 68. Highs 82 to 92. West
winds 3 to 8 mph.
.SUNDAY...A chance of showers. Mostly clear. Lows 48 to 59. Highs
76 to 85. West winds 2 to 7 mph.
.MONDAY...Mostly clear. Lows 47 to 58. Highs 82 to 91. East winds
1 to 6 mph.
.TUESDAY...Partly cloudy with a slight chance of showers. Lows
51 to 62. Highs 81 to 90. Southwest winds 1 to 6 mph.
$$
ORZ701-192315-
Eastern Columbia River Gorge of Oregon-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke in the morning.
* Max temperature.....85-91.
* Min humidity........19-31 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 6 mph...except
northwest 2 to 7 mph in the eastern Columbia River Gorge.
* Ridges/upr slopes....Northwest winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Low (33-75) increasing to moderate (215-281)
in the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Min temperature.....54-60.
* Max humidity........55-70 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph in the evening
becoming drainage winds less than 5 mph. In the eastern
Columbia River Gorge, west winds 2 to 7 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.......500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Low (120-160) decreasing to low (29-47) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke in the morning.
* Max temperature.....89-94.
* Min humidity........20-31 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph...except northwest
up to 5 mph in the eastern Columbia River Gorge.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (32-68) increasing to moderate (313-375)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 58 to 64. Highs 87 to 92. West
winds up to 5 mph.
.SATURDAY...Not as warm. A chance of showers. Partly cloudy. Lows
55 to 62. Highs 74 to 81. West winds 6 to 12 mph.
.SUNDAY...Mostly clear. Lows 48 to 55. Highs 78 to 83. West winds
6 to 12 mph.
.MONDAY...Mostly clear. Lows 51 to 57. Highs 83 to 88. North
winds 1 to 6 mph.
.TUESDAY...Partly cloudy. Lows 54 to 60. Highs 80 to 86. West
winds 2 to 7 mph.
$$
ORZ702-192315-
East Slopes of the Mt. Hood National Forest-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke.
* Max temperature.....85-90...except 77-84 ridges.
* Min humidity........18-26 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.......5500 ft agl.
* Transport winds.....West around 5 mph.
* Ventilation Index...Low (34-52) increasing to low to moderate
(198-254) in the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Min temperature.....53-60.
* Max humidity........45-60 percent.
* Humidity recovery...Moderate.
* 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.......500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Low (82-128) decreasing to low (31-41) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....88-93...except 80-88 ridges.
* Min humidity........19-29 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.......7500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (35-55) increasing to moderate (372-464)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 58 to 65. Highs 78 to 89. Terrain
driven winds less than 5 mph.
.SATURDAY...Not as warm. A chance of showers. Partly cloudy. Lows
52 to 60. Highs 65 to 80. West winds 1 to 6 mph.
.SUNDAY...Mostly clear. Lows 45 to 51. Highs 69 to 81. West winds
2 to 7 mph.
.MONDAY...Mostly clear. Lows 48 to 55. Highs 74 to 85. Terrain
driven winds less than 5 mph.
.TUESDAY...Partly cloudy with a slight chance of showers. Lows
51 to 58. Highs 70 to 84. Terrain driven winds less than 5 mph.
$$
ORZ695-192315-
Eagle Cap Wilderness-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
Patchy smoke in the morning.
* Max temperature.....81-91...except 71-81 ridges.
* Min humidity........12-18 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....West winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-63) increasing to moderate to high
(439-639) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Patchy smoke.
* Min temperature.....54-61.
* Max humidity........30-40 percent.
* Humidity recovery...Poor.
* 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....North winds 2 to 5 mph shifting to the
southwest after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....North around 5 mph.
* Ventilation Index...Low (53-139) decreasing to low (25-31) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....85-96...except 75-86 ridges.
* Min humidity........14-21 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 2
to 7 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......9500 ft agl.
* Transport winds.....Southeast around 5 mph shifting to the
southwest in the afternoon.
* Ventilation Index...Low (25-63) increasing to moderate to very
high (497-843) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 57 to 64. Highs 79 to 94. North
winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a slight chance of showers and
thunderstorms. Lows 58 to 65. Highs 72 to 87. West winds 6 to
12 mph.
.SUNDAY...A slight chance of showers. Mostly clear. Lows 48 to
55. Highs 68 to 82. West winds 6 to 12 mph.
.MONDAY...Mostly clear. Lows 48 to 55. Highs 72 to 87. South
winds 2 to 7 mph.
.TUESDAY...Partly cloudy. Lows 53 to 59. Highs 71 to 86. South
winds 3 to 8 mph.
$$
ORZ694-192315-
Grande Ronde Valley of Oregon-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
Patchy smoke in the morning.
* Max temperature.....90-95.
* Min humidity........12-17 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.......7500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-32) increasing to moderate (310-382)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Areas of smoke in the evening,
then patchy smoke after midnight.
* Min temperature.....52-57.
* Max humidity........40-48 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...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.......500 ft agl.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Low (117-173) decreasing to low (25-32) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....93-98.
* Min humidity........13-18 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.......8500 ft agl.
* Transport winds.....North around 5 mph shifting to the southwest
in the afternoon.
* Ventilation Index...Low (25-38) increasing to moderate (262-402)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 56 to 61. Highs 93 to 98. North
winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a slight chance of showers and
thunderstorms. Lows 59 to 64. Highs 88 to 93. West winds 3 to
8 mph.
.SUNDAY...Mostly clear. Lows 48 to 53. Highs 82 to 87. Northwest
winds 4 to 10 mph.
.MONDAY...Mostly clear. Lows 47 to 52. Highs 87 to 92. Southeast
winds 1 to 6 mph.
.TUESDAY...Partly cloudy with a slight chance of showers. Lows
52 to 57. Highs 86 to 91. South winds 1 to 6 mph.
$$
ORZ699-192315-
Western Forested Blue Mountains-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the morning.
* Max temperature.....85-91...except 79-86 ridges.
* 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.......10000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (28-56) increasing to moderate to very
high (456-740) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Patchy smoke after midnight.
* Min temperature.....53-59.
* Max humidity........32-40 percent.
* Humidity recovery...Poor.
* 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.....North 5 to 10 mph.
* Ventilation Index...Low (97-189) decreasing to low (25-28) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....87-94...except 82-89 ridges.
* Min humidity........14-19 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.....East around 5 mph shifting to the southwest
in the afternoon.
* Ventilation Index...Low (25-39) increasing to moderate to very
high (379-771) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 56 to 63. Highs 84 to 92. Terrain
driven winds less than 5 mph.
.SATURDAY...A slight chance of showers and thunderstorms. Mostly
cloudy. Lows 57 to 63. Highs 78 to 86. West winds 2 to 7 mph.
.SUNDAY...Mostly clear. Lows 46 to 52. Highs 74 to 82. West winds
1 to 6 mph.
.MONDAY...Mostly clear. Lows 47 to 53. Highs 78 to 87. Terrain
driven winds less than 5 mph.
.TUESDAY...Partly cloudy with a slight chance of showers. Lows
51 to 57. Highs 77 to 86. Terrain driven winds less than 5 mph.
$$
ORZ696-192315-
John Day Valley-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the morning.
* Max temperature.....86-95...except 82-87 ridges.
* Min humidity........9-14 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1
to 5 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming northwest 1
to 5 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (25-32) increasing to moderate to high
(363-579) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....56-61.
* Max humidity........33-38 percent.
* Humidity recovery...Poor.
* 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....North 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.......500 ft agl.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Low to moderate (161-261) decreasing to low
(25-26) after midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke in the morning.
* Max temperature.....89-97...except 84-89 ridges.
* 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.......9500 ft agl.
* Transport winds.....North around 5 mph shifting to the west in
the afternoon.
* Ventilation Index...Low (25-28) increasing to moderate to high
(351-593) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 59 to 64. Highs 87 to 96. Northeast
winds up to 5 mph.
.SATURDAY...Mostly cloudy. Lows 58 to 64. Highs 81 to 90. West
winds 4 to 9 mph.
.SUNDAY...Mostly clear. Lows 48 to 54. Highs 78 to 87. West winds
3 to 8 mph.
.MONDAY...Mostly clear. Lows 50 to 55. Highs 83 to 92. Southeast
winds 1 to 6 mph.
.TUESDAY...Partly cloudy. Lows 53 to 59. Highs 81 to 90.
Southwest winds 1 to 6 mph.
$$
ORZ700-192315-
Central Mountains of Oregon-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke.
* Max temperature.....88-93...except 81-88 ridges.
* Min humidity........9-14 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 2
to 7 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...Low (25-31) increasing to moderate to high
(322-614) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Patchy smoke.
* Min temperature.....49-58...except 55-60 ridges.
* Max humidity........37-52 percent...except 31-37 percent ridges.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....North 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.......500 ft agl.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Low to moderate (196-368) decreasing to low
(25-38) after midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....90-95...except 83-89 ridges.
* Min humidity........12-17 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 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.......11500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-34) increasing to moderate to very
high (404-732) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 54 to 62. Highs 87 to 92. West
winds 1 to 6 mph.
.SATURDAY...Partly cloudy. Lows 50 to 59. Highs 80 to 86. West
winds 3 to 8 mph.
.SUNDAY...Mostly clear. Lows 41 to 50. Highs 79 to 84. West winds
4 to 10 mph.
.MONDAY...Mostly clear. Lows 44 to 52. Highs 83 to 89. South
winds 1 to 6 mph.
.TUESDAY...Partly cloudy. Lows 47 to 56. Highs 82 to 87.
Southwest winds 1 to 6 mph.
$$
ORZ703-192315-
Warm Springs Reservation-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke.
* Max temperature.....88-95...except 76-85 ridges.
* Min humidity........13-20 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming north 1 to
6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 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...Low (27-43) increasing to moderate (212-326)
in the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy. Smoky in the evening, then
patchy smoke after midnight.
* Min temperature.....55-60.
* Max humidity........45-58 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 7 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.......500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low to moderate (137-241) decreasing to low
(25-36) after midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....90-98...except 79-88 ridges.
* Min humidity........15-22 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.......9500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (25-45) increasing to moderate to high
(338-554) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 59 to 64. Highs 84 to 93. West
winds 1 to 6 mph.
.SATURDAY...A slight chance of showers. Partly cloudy. Lows 54 to
60. Highs 72 to 86. West winds 4 to 10 mph.
.SUNDAY...Mostly clear. Lows 47 to 52. Highs 75 to 85. West winds
6 to 12 mph.
.MONDAY...Mostly clear. Lows 51 to 56. Highs 80 to 90. Northeast
winds 1 to 6 mph.
.TUESDAY...Partly cloudy. Lows 54 to 59. Highs 76 to 89. West
winds 2 to 7 mph.
$$
ORZ704-192315-
Northern Deschutes National Forest-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Mostly cloudy then becoming mostly sunny.
Patchy smoke.
* Max temperature.....88-93...except 75-85 ridges.
* Min humidity........14-22 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph becoming northwest 1
to 6 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...Low (25-34) increasing to moderate (328-438)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Patchy smoke.
* Min temperature.....48-57.
* Max humidity........46-61 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....West winds up to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low to moderate (138-242) decreasing to low
(25-26) after midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....90-95...except 77-87 ridges.
* Min humidity........16-25 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph becoming northwest 1
to 5 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (25-48) increasing to high (525-659) in
the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 52 to 61. Highs 78 to 90. West
winds 1 to 6 mph.
.SATURDAY...Not as warm. A chance of showers. Partly cloudy. Lows
48 to 56. Highs 67 to 81. West winds 4 to 9 mph.
.SUNDAY...Mostly clear. Lows 39 to 47. Highs 72 to 84. West winds
4 to 9 mph.
.MONDAY...Mostly clear. Lows 44 to 52. Highs 76 to 88. Terrain
driven winds less than 5 mph.
.TUESDAY...Partly cloudy. Lows 46 to 54. Highs 71 to 85. West
winds 1 to 6 mph.
$$
ORZ705-192315-
Southern Deschutes National Forest-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....87-92...except 77-86 ridges.
* Min humidity........11-20 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 1 to 6
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 1 to 6
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......11500 ft agl.
* Transport winds.....South 5 to 10 mph.
* Ventilation Index...Low (25-38) increasing to moderate to high
(470-664) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear. Patchy smoke.
* Min temperature.....44-55.
* Max humidity........46-61 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 6 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....North winds 1 to 6 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low to moderate (164-384) decreasing to low
(25-34) after midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny. Patchy smoke.
* Max temperature.....88-93...except 78-87 ridges.
* Min humidity........13-24 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* 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.......12000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (26-50) increasing to very high
(784-1032) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 48 to 58. Highs 79 to 89. West
winds up to 5 mph.
.SATURDAY...A slight chance of showers. Partly cloudy. Lows 42 to
52. Highs 70 to 82. West winds 2 to 7 mph.
.SUNDAY...Mostly clear. Lows 34 to 44. Highs 74 to 84. West winds
1 to 6 mph.
.MONDAY...Mostly clear. Lows 38 to 49. Highs 77 to 87. Terrain
driven winds less than 5 mph.
.TUESDAY...Partly cloudy. Lows 41 to 51. Highs 74 to 84.
Southwest winds 1 to 6 mph.
$$
ORZ697-192315-
Central Blue Mountains-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the morning.
* Max temperature.....87-92...except 81-88 ridges.
* Min humidity........9-14 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.....Southwest 5 to 10 mph.
* Ventilation Index...Low (25-45) increasing to high to very high
(690-796) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....51-60.
* Max humidity........31-39 percent.
* Humidity recovery...Poor.
* 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.....North 5 to 10 mph.
* Ventilation Index...Low to moderate (49-211) decreasing to low
(25-38) after midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....89-94...except 84-90 ridges.
* Min humidity........9-14 percent.
* 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 6
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......11000 ft agl.
* Transport winds.....Southeast around 5 mph shifting to the
southwest in the afternoon.
* Ventilation Index...Low (25-48) increasing to very high
(742-1000) in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 54 to 63. Highs 85 to 91. West
winds 1 to 6 mph.
.SATURDAY...Mostly cloudy. Lows 54 to 63. Highs 79 to 85. West
winds 4 to 9 mph.
.SUNDAY...Mostly clear. Lows 45 to 52. Highs 76 to 82. West winds
3 to 8 mph.
.MONDAY...Mostly clear. Lows 45 to 53. Highs 80 to 87. South
winds 1 to 6 mph.
.TUESDAY...Partly cloudy with a slight chance of showers. Lows
49 to 57. Highs 78 to 85. Southwest winds 1 to 6 mph.
$$
ORZ698-192315-
Southern Blue Mountains-
559 AM PDT Wed Aug 19 2026
.TODAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the morning.
* Max temperature.....87-93.
* Min humidity........7-12 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.....Northeast around 5 mph shifting to the
southwest in the afternoon.
* Ventilation Index...Low (25-31) increasing to high to very high
(548-736) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....52-60.
* Max humidity........31-38 percent.
* Humidity recovery...Poor.
* 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.......500 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (56-140) decreasing to low (38-48) after
midnight.
.THURSDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....89-94.
* Min humidity........8-13 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.....Southeast around 5 mph increasing to
southwest around 15 mph in the afternoon.
* Ventilation Index...Low (25-35) increasing to very high (785-955)
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Mostly cloudy. Lows 55 to 62. Highs 87 to 93. Northwest
winds 1 to 6 mph.
.SATURDAY...Mostly cloudy. Lows 54 to 63. Highs 82 to 88. West
winds 4 to 10 mph.
.SUNDAY...Mostly clear. Lows 45 to 54. Highs 80 to 85. West winds
4 to 10 mph.
.MONDAY...Mostly clear. Lows 46 to 54. Highs 83 to 89. South
winds 1 to 6 mph.
.TUESDAY...Partly cloudy. Lows 50 to 58. Highs 82 to 87.
Southwest winds 2 to 7 mph.
$$
.8-14 DAY OUTLOOK for Wednesday August 26 through Tuesday September 1...
A greater chance of near normal precipitation and above normal
temperatures.
$$