Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
047
FNUS56 KPDT 151219
FWFPDT
Fire Weather Planning Forecast for NE Oregon and SE Washington
National Weather Service Pendleton OR
519 AM PDT Tue Sep 15 2026
.DISCUSSION...An approaching low-pressure system will bring a
slight chance to chance (15-40%) of showers to the Cascades,
central Oregon, and the Blue Mountains today through tonight. As
the low moves inland later this week, chances of thunderstorms
over the Blue Mountains will increase on Thursday (15-30%) and
Friday (10-15%). Otherwise, temperatures will gradually warm to
above normal by the end of the week.
***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. ***
WAZ695-152330-
East Washington South Central Cascade Mountains-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the morning, then a chance of showers in the afternoon.
* Max temperature.....54-60...except 46-53 ridges.
* Min humidity........66-81 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....10 percent (very low chance).
* Mixing height.......3500 ft agl.
* Transport winds.....North around 5 mph.
* Ventilation Index...Low (26-42) increasing to low (49-125) in the
afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy. A slight chance of showers in
the evening.
* Min temperature.....38-44.
* Max humidity........81-96 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....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Northeast 5 to 10 mph.
* Ventilation Index...Low (46-66) decreasing to low (25-37) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....64-72...except 56-64 ridges.
* Min humidity........35-50 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming east 1 to 6
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming east 2 to 7
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5500 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (40-76) increasing to moderate (311-411)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Clear. Lows 42 to 48. Highs 65 to 77. Terrain driven
winds less than 5 mph.
.FRIDAY...Mostly clear. Lows 43 to 49. Highs 64 to 76. West winds
2 to 7 mph.
.SATURDAY...Mostly clear. Lows 44 to 50. Highs 65 to 77. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 46 to 51. Highs 66 to 77. Terrain
driven winds less than 5 mph.
.MONDAY...Partly cloudy. Lows 45 to 51. Highs 58 to 71. West
winds 1 to 6 mph.
$$
WAZ690-152330-
Kittitas Valley-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the afternoon.
* Max temperature.....58-65...except 49-59 ridges.
* Min humidity........62-77 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....10 percent (very low chance).
* Mixing height.......4500 ft agl.
* Transport winds.....North around 5 mph.
* Ventilation Index...Low (25-39) increasing to low (108-196) in
the afternoon.
.TONIGHT...
* Sky/weather.........Partly cloudy.
* Min temperature.....44-49.
* Max humidity........77-92 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....North winds up to 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low (63-123) decreasing to low (32-44) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....67-73...except 58-66 ridges.
* Min humidity........42-49 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northeast winds 2 to 7 mph.
* Ridges/upr slopes....Northeast winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5500 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (58-102) increasing to moderate (316-498)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Clear. Lows 47 to 53. Highs 72 to 78. Terrain driven
winds less than 5 mph.
.FRIDAY...Mostly clear. Lows 49 to 54. Highs 72 to 79. West winds
1 to 6 mph.
.SATURDAY...Mostly clear. Lows 49 to 54. Highs 72 to 78. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 50 to 55. Highs 73 to 80. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 50 to 56. Highs 69 to 77. Northwest
winds 1 to 6 mph.
$$
WAZ694-152330-
Yakama Alpine District-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the afternoon.
* Max temperature.....59-67...except 50-60 ridges.
* Min humidity........54-66 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....10 percent (very low chance).
* Mixing height.......4000 ft agl.
* Transport winds.....Northwest around 5 mph shifting to the east
in the afternoon.
* Ventilation Index...Low (25-28) increasing to low (52-150) in the
afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy. A
slight chance of showers in the evening.
* Min temperature.....40-47.
* Max humidity........80-95 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 becoming
northeast 1 to 5 mph after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northeast 5 to 10 mph.
* Ventilation Index...Low (61-89) decreasing to low (30-46) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....65-74...except 56-66 ridges.
* Min humidity........39-50 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northeast winds 3 to 8 mph.
* Ridges/upr slopes....Northeast winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (77-129) increasing to moderate (397-495)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Clear. Lows 43 to 50. Highs 68 to 79. North winds up
to 5 mph.
.FRIDAY...Mostly clear. Lows 44 to 51. Highs 68 to 79. West winds
1 to 6 mph.
.SATURDAY...Mostly clear. Lows 44 to 52. Highs 69 to 81. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 46 to 53. Highs 69 to 81. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 45 to 52. Highs 63 to 75. West winds
2 to 7 mph.
$$
ORZ691-WAZ691-152330-
Lower Columbia Basin of Oregon-Lower Columbia Basin of Washington-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....64-71...except 58-65 ridges.
* Min humidity........44-57 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 north 1 to 6
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......4500 ft agl.
* Transport winds.....Southwest around 5 mph shifting to the north
in the afternoon.
* Ventilation Index...Low (25-32) increasing to low (96-186) in the
afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Min temperature.....46-51.
* Max humidity........81-96 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 1 to 6 mph.
* Ridges/upr slopes....North winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low (80-128) decreasing to low (25-42) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....68-77...except 64-72 ridges.
* Min humidity........36-49 percent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 3 to 8 mph.
* Ridges/upr slopes....North winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (40-100) increasing to moderate to high
(329-523) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear. Lows 47 to 52. Highs 73 to 79.
Northwest winds 3 to 8 mph.
.FRIDAY...Mostly clear. Lows 49 to 54. Highs 76 to 82. Southwest
winds 2 to 7 mph.
.SATURDAY...Mostly clear. Lows 49 to 54. Highs 77 to 82. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 50 to 55. Highs 78 to 84. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 50 to 55. Highs 73 to 81. West winds
3 to 8 mph.
$$
ORZ692-WAZ692-152330-
Northern Blue Mountains of Oregon-Blue Mountains of Washington-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....61-68...except 55-62 ridges.
* Min humidity........39-54 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.......5000 ft agl.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Low (27-41) increasing to low to moderate
(106-212) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Min temperature.....40-47.
* Max humidity........78-93 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....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Low (64-90) decreasing to low (25-32) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....63-72...except 59-65 ridges.
* Min humidity........39-54 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming north 2 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.......4500 ft agl.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Low (32-62) increasing to moderate (220-352)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear with a slight chance of showers. Lows
42 to 50. Highs 62 to 72. Terrain driven winds less than 5 mph.
.FRIDAY...A slight chance of showers. Partly cloudy. Lows 43 to
51. Highs 67 to 77. Southwest winds up to 5 mph.
.SATURDAY...Mostly clear. Lows 44 to 51. Highs 70 to 80. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 45 to 53. Highs 72 to 81. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 46 to 55. Highs 68 to 77. Terrain
driven winds less than 5 mph.
$$
ORZ693-WAZ693-152330-
Canyon Grasslands of Wallowa County-
Southeast Washington Grande Ronde Valley-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Max temperature.....64-73...except 59-66 ridges.
* Min humidity........31-39 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1
to 5 mph in the afternoon.
* Ridges/upr slopes....South winds 1 to 6 mph shifting to the
northwest 1 to 5 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Low (25-47) increasing to low to moderate
(172-326) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Min temperature.....40-48.
* Max humidity........74-89 percent.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....North winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....North 5 to 10 mph.
* Ventilation Index...Low (75-105) decreasing to low (25-29) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....67-76...except 62-68 ridges.
* Min humidity........34-42 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northeast 2
to 6 mph in the afternoon.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......4500 ft agl.
* Transport winds.....Northeast 5 to 10 mph.
* Ventilation Index...Low (32-54) increasing to moderate (257-345)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Partly cloudy with a chance of showers. Lows 42 to
50. Highs 67 to 76. Northwest winds 1 to 6 mph.
.FRIDAY...A chance of showers and a slight chance of
thunderstorms. Partly cloudy. Lows 42 to 51. Highs 68 to 78.
Southwest winds up to 5 mph.
.SATURDAY...Mostly clear. Lows 41 to 51. Highs 72 to 81. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 43 to 53. Highs 75 to 84. South
winds up to 5 mph.
.MONDAY...Mostly clear. Lows 44 to 54. Highs 72 to 82. Southwest
winds 1 to 6 mph.
$$
ORZ701-152330-
Eastern Columbia River Gorge of Oregon-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....66-71.
* Min humidity........46-61 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph. In the eastern
Columbia River Gorge, 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.......4000 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-47) increasing to low to moderate
(173-225) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Min temperature.....45-51.
* Max humidity........81-96 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....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low (78-104) decreasing to low (25-26) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....71-76.
* Min humidity........38-46 percent.
* 20-foot winds.......
* Valleys/lwr slopes...East winds 3 to 8 mph in the afternoon.
Upslope less than 5 mph in the morning. In the eastern
Columbia River Gorge, east winds 2 to 5 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming east 2 to 7
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....Northeast 5 to 10 mph.
* Ventilation Index...Low (31-75) increasing to moderate (350-484)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear. Lows 47 to 52. Highs 77 to 82.
Northeast winds 1 to 6 mph.
.FRIDAY...Mostly clear. Lows 48 to 53. Highs 77 to 82. West winds
1 to 6 mph.
.SATURDAY...Mostly clear. Lows 48 to 53. Highs 79 to 84. West
winds up to 5 mph.
.SUNDAY...Mostly clear. Lows 50 to 55. Highs 79 to 84. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 48 to 54. Highs 72 to 77. West winds
3 to 8 mph.
$$
ORZ702-152330-
East Slopes of the Mt. Hood National Forest-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....62-69...except 56-64 ridges.
* Min humidity........47-62 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....10 percent (very low chance).
* Mixing height.......4000 ft agl.
* Transport winds.....West around 5 mph.
* Ventilation Index...Low (26-40) increasing to low (128-174) in
the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy. A
slight chance of showers in the evening.
* Min temperature.....41-47.
* Max humidity........80-95 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....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northeast 5 to 10 mph.
* Ventilation Index...Low (35-79) decreasing to low (28-46) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....59-71.
* Min humidity........40-52 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northeast 2
to 6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming east 2 to 5
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......4500 ft agl.
* Transport winds.....East 10 to 15 mph.
* Ventilation Index...Low (93-139) increasing to moderate (382-468)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear. Lows 44 to 51. Highs 68 to 79. Terrain
driven winds less than 5 mph.
.FRIDAY...Mostly clear. Lows 45 to 51. Highs 68 to 80. West winds
up to 5 mph.
.SATURDAY...Mostly clear. Lows 46 to 52. Highs 71 to 82. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 48 to 55. Highs 71 to 82. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 46 to 53. Highs 61 to 75. Terrain
driven winds less than 5 mph.
$$
ORZ695-152330-
Eagle Cap Wilderness-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Max temperature.....61-70...except 51-61 ridges.
* Min humidity........31-42 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.......5500 ft agl.
* Transport winds.....South around 10 mph.
* Ventilation Index...Low (39-87) increasing to moderate (253-369)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy.
* Min temperature.....41-47...except 36-43 ridges.
* Max humidity........71-85 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 4 to 9 mph.
* Ridges/upr slopes....North winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low (50-90) decreasing to low (25-56) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....65-75...except 56-66 ridges.
* Min humidity........33-44 percent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 4 to 9 mph.
* Ridges/upr slopes....North winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5000 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (44-104) increasing to moderate (265-383)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...A chance of showers and a slight chance of
thunderstorms. Partly cloudy. Lows 40 to 48. Highs 57 to 71.
North winds 4 to 10 mph.
.FRIDAY...A chance of showers and a slight chance of
thunderstorms. Partly cloudy. Lows 39 to 47. Highs 59 to 73.
Terrain driven winds less than 5 mph.
.SATURDAY...Mostly clear. Lows 40 to 48. Highs 62 to 76. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 42 to 50. Highs 64 to 78. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 44 to 51. Highs 62 to 77. South
winds 1 to 6 mph.
$$
ORZ694-152330-
Grande Ronde Valley of Oregon-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Max temperature.....68-73.
* Min humidity........33-39 percent.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 1 to 6 mph.
* Ridges/upr slopes....South winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5500 ft agl.
* Transport winds.....South 5 to 10 mph.
* Ventilation Index...Low (28-50) increasing to moderate (219-371)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Min temperature.....41-46.
* Max humidity........87-99 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 6 to 12 mph.
* Ridges/upr slopes....Northwest winds 6 to 12 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....North 10 to 15 mph.
* Ventilation Index...Low (92-122) decreasing to low (42-62) after
midnight.
.WEDNESDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....72-77.
* Min humidity........33-38 percent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 6 to 12 mph.
* Ridges/upr slopes....North winds 7 to 13 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......4500 ft agl.
* Transport winds.....North around 15 mph.
* Ventilation Index...Low (83-133) increasing to moderate to high
(357-507) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...A chance of showers. Partly cloudy. Lows 41 to 46.
Highs 70 to 75. Northwest winds 4 to 10 mph.
.FRIDAY...A chance of showers and a slight chance of
thunderstorms. Partly cloudy. Lows 41 to 46. Highs 73 to 78.
Northwest winds up to 5 mph.
.SATURDAY...Mostly clear. Lows 42 to 47. Highs 76 to 81. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 44 to 49. Highs 79 to 84. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 45 to 50. Highs 76 to 81. South
winds 1 to 6 mph.
$$
ORZ699-152330-
Western Forested Blue Mountains-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Max temperature.....63-69...except 57-64 ridges.
* Min humidity........27-40 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 1
to 6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (26-54) increasing to low to moderate
(166-430) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy. A
slight chance of showers.
* Min temperature.....39-44.
* Max humidity........80-95 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low (91-161) decreasing to low (30-48) after
midnight.
.WEDNESDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....62-71...except 57-66 ridges.
* Min humidity........34-49 percent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....Northeast 10 to 15 mph.
* Ventilation Index...Low (55-99) increasing to moderate (326-444)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Partly cloudy with a chance of showers. Lows 40 to
45. Highs 61 to 69. North winds 1 to 6 mph.
.FRIDAY...A chance of showers. Partly cloudy. Lows 41 to 47.
Highs 66 to 75. Terrain driven winds less than 5 mph.
.SATURDAY...Mostly clear. Lows 42 to 48. Highs 70 to 78. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 44 to 50. Highs 72 to 81. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 45 to 51. Highs 68 to 76. South
winds up to 5 mph.
$$
ORZ696-152330-
John Day Valley-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Max temperature.....65-73...except 60-65 ridges.
* Min humidity........25-35 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 becoming northwest 1
to 6 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....South around 5 mph shifting to the west in
the afternoon.
* Ventilation Index...Low (25-34) increasing to low to moderate
(166-372) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy. A
slight chance of showers.
* Min temperature.....41-47.
* Max humidity........79-94 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph.
* Ridges/upr slopes....North winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low to moderate (143-215) decreasing to low
(26-48) after midnight.
.WEDNESDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....64-72...except 59-64 ridges.
* Min humidity........36-45 percent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6500 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (49-91) increasing to moderate (385-427)
in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Partly cloudy with a chance of showers. Lows 41 to
47. Highs 65 to 74. North winds 1 to 6 mph.
.FRIDAY...A slight chance of showers. Mostly clear. Lows 43 to
49. Highs 71 to 80. Terrain driven winds less than 5 mph.
.SATURDAY...Mostly clear. Lows 45 to 50. Highs 75 to 83. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 46 to 52. Highs 77 to 86. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 47 to 52. Highs 72 to 81. Southwest
winds up to 5 mph.
$$
ORZ700-152330-
Central Mountains of Oregon-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....66-71...except 59-65 ridges.
* Min humidity........24-38 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northwest 3
to 8 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming northwest 2
to 7 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....South around 5 mph shifting to the west in
the afternoon.
* Ventilation Index...Low (25-31) increasing to moderate (226-372)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the evening. A chance of showers after midnight.
* Min temperature.....37-45.
* Max humidity........85-100 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 4 to 9 mph.
* Ridges/upr slopes....North winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North 10 to 15 mph.
* Ventilation Index...Low to moderate (187-325) decreasing to low
(38-88) after midnight.
.WEDNESDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....64-69...except 56-63 ridges.
* Min humidity........36-45 percent...except 42-57 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 5 to 11 mph.
* Ridges/upr slopes....North winds 5 to 11 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....Northeast 10 to 15 mph.
* Ventilation Index...Low (72-128) increasing to moderate to high
(410-590) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear with a slight chance of showers. Lows
35 to 45. Highs 66 to 74. North winds 3 to 8 mph.
.FRIDAY...Mostly clear. Lows 38 to 47. Highs 72 to 79. West winds
up to 5 mph.
.SATURDAY...Mostly clear. Lows 39 to 48. Highs 75 to 83. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 41 to 50. Highs 78 to 84. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 42 to 50. Highs 72 to 78. West winds
1 to 6 mph.
$$
ORZ703-152330-
Warm Springs Reservation-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....65-72...except 55-62 ridges.
* Min humidity........38-46 percent...except 45-57 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming north 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.......5500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low (25-36) increasing to moderate (205-265)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the evening.
* Min temperature.....44-49.
* Max humidity........81-90 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 1 to 6 mph.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low (71-171) decreasing to low (31-65) after
midnight.
.WEDNESDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....65-73...except 55-63 ridges.
* Min humidity........38-46 percent...except 47-60 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph shifting to the
northeast 7 to 13 mph in the afternoon.
* Ridges/upr slopes....Northeast winds 4 to 10 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5500 ft agl.
* Transport winds.....Northeast 10 to 15 mph.
* Ventilation Index...Low (100-150) increasing to moderate to high
(485-641) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear. Lows 45 to 50. Highs 71 to 78. North
winds 3 to 8 mph.
.FRIDAY...Mostly clear. Lows 47 to 52. Highs 73 to 83. West winds
1 to 6 mph.
.SATURDAY...Mostly clear. Lows 47 to 52. Highs 76 to 84. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 50 to 55. Highs 76 to 85. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 48 to 53. Highs 67 to 79. West winds
2 to 7 mph.
$$
ORZ704-152330-
Northern Deschutes National Forest-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....65-70...except 55-63 ridges.
* Min humidity........33-45 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.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-39) increasing to moderate (246-324)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy. A chance of showers in the
evening, then a slight chance of showers after midnight.
* Min temperature.....38-45.
* Max humidity........85-100 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph.
* Ridges/upr slopes....North winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low (63-177) decreasing to low (82-120) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....63-68...except 52-60 ridges.
* Min humidity........42-49 percent...except 50-65 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northeast winds 6 to 12 mph.
* Ridges/upr slopes....Northeast winds 6 to 12 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......5000 ft agl.
* Transport winds.....Northeast around 15 mph.
* Ventilation Index...Low (131-183) increasing to moderate to high
(397-553) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear. Lows 38 to 45. Highs 65 to 76. North
winds 2 to 7 mph.
.FRIDAY...Mostly clear. Lows 40 to 46. Highs 68 to 80. West winds
1 to 6 mph.
.SATURDAY...Mostly clear. Lows 41 to 48. Highs 72 to 83. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 44 to 51. Highs 73 to 84. Terrain
driven winds less than 5 mph.
.MONDAY...Partly cloudy. Lows 42 to 49. Highs 63 to 75. West
winds 1 to 6 mph.
$$
ORZ705-152330-
Southern Deschutes National Forest-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....65-70...except 56-64 ridges.
* Min humidity........23-37 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming north 2 to
7 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming northwest 2
to 6 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 (25-36) increasing to moderate (309-431)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy. A chance of showers.
* Min temperature.....33-40.
* Max humidity........89-100 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 3 to 8 mph.
* Ridges/upr slopes....North winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low to moderate (121-313) decreasing to low
(67-129) after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....60-65...except 51-59 ridges.
* Min humidity........40-55 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northeast winds 4 to 9 mph.
* Ridges/upr slopes....Northeast winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....Northeast around 15 mph.
* Ventilation Index...Low (115-189) increasing to moderate to high
(425-555) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly clear with a slight chance of showers. Lows
32 to 40. Highs 65 to 72. North winds 1 to 6 mph.
.FRIDAY...Mostly clear. Lows 34 to 43. Highs 70 to 78. Terrain
driven winds less than 5 mph.
.SATURDAY...Mostly clear. Lows 35 to 45. Highs 73 to 81. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 37 to 47. Highs 75 to 83. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 37 to 46. Highs 65 to 75. West winds
up to 5 mph.
$$
ORZ697-152330-
Central Blue Mountains-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Max temperature.....65-70...except 60-66 ridges.
* Min humidity........24-30 percent.
* 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.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....South 5 to 10 mph.
* Ventilation Index...Low (40-58) increasing to moderate to high
(394-514) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers
after midnight.
* Min temperature.....37-44.
* Max humidity........75-90 percent.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low to moderate (50-224) decreasing to low
(33-51) after midnight.
.WEDNESDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....65-70...except 60-67 ridges.
* Min humidity........30-41 percent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph.
* Ridges/upr slopes....Northeast winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......7500 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (54-86) increasing to moderate to high
(407-549) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...A chance of showers. Partly cloudy. Lows 37 to 44.
Highs 61 to 67. North winds 2 to 7 mph.
.FRIDAY...A slight chance of showers. Partly cloudy. Lows 38 to
44. Highs 66 to 73. Terrain driven winds less than 5 mph.
.SATURDAY...Mostly clear. Lows 39 to 45. Highs 69 to 76. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 41 to 47. Highs 71 to 79. Terrain
driven winds less than 5 mph.
.MONDAY...Mostly clear. Lows 42 to 49. Highs 69 to 76. South
winds up to 5 mph.
$$
ORZ698-152330-
Southern Blue Mountains-
519 AM PDT Tue Sep 15 2026
.TODAY...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Max temperature.....66-71...except 61-66 ridges.
* Min humidity........19-24 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.......7500 ft agl.
* Transport winds.....South 5 to 10 mph.
* Ventilation Index...Low (27-43) increasing to moderate (312-462)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly cloudy then becoming partly cloudy. A
slight chance of showers after midnight.
* Min temperature.....38-45.
* Max humidity........73-88 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 4 to 9 mph.
* Ridges/upr slopes....North winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....North 10 to 15 mph.
* Ventilation Index...Low to moderate (61-223) decreasing to low
(48-72) after midnight.
.WEDNESDAY...
* Sky/weather.........Partly cloudy then becoming mostly sunny.
* Max temperature.....65-72.
* Min humidity........25-36 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northeast winds 3 to 8 mph.
* Ridges/upr slopes....Northeast winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......8000 ft agl.
* Transport winds.....Northeast around 10 mph.
* Ventilation Index...Low (74-94) increasing to moderate to high
(477-621) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...A chance of showers. Partly cloudy. Lows 37 to 44.
Highs 64 to 70. North winds 2 to 7 mph.
.FRIDAY...A slight chance of showers. Mostly clear. Lows 38 to
44. Highs 69 to 74. West winds 1 to 6 mph.
.SATURDAY...Mostly clear. Lows 39 to 45. Highs 72 to 77. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly clear. Lows 41 to 47. Highs 75 to 80. East winds
up to 5 mph.
.MONDAY...Mostly clear. Lows 42 to 48. Highs 73 to 78. Southeast
winds 1 to 6 mph.
$$
.8-14 DAY OUTLOOK for Tuesday September 22 through Monday September 28...
A greater chance of near- to above-normal temperatures and above-
normal precipitation.
$$