Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
360
FNUS56 KPDT 201238
FWFPDT
Fire Weather Planning Forecast for NE Oregon and SE Washington
National Weather Service Pendleton OR
538 AM PDT Sun Sep 20 2026
.DISCUSSION...Elevated fire weather conditions persist through the
next couple of days due to drier air present through the region.
Overall, minimum relative humidities will drop to around 20 to 30
percent, with lower values around Central Oregon dropping to
around 10 to 20 percent. Overnight recoveries will generally be
fair to good with humidities at 50 to 70 percent, with the better
values in the lower elevation areas.
***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. ***
WAZ695-202315-
East Washington South Central Cascade Mountains-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....73-80...except 65-72 ridges.
* Min humidity........30-38 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southeast 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.......5500 ft agl.
* Transport winds.....South around 5 mph.
* Ventilation Index...Low (25-30) increasing to low to moderate
(180-256) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....48-53.
* Max humidity........56-71 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.......Near surface.
* Transport winds.....South around 5 mph.
* Ventilation Index...Low (32-54) decreasing to low (25-26) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
* Max temperature.....73-80...except 64-72 ridges.
* Min humidity........32-41 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.....West 5 to 10 mph.
* Ventilation Index...Low (26-40) increasing to moderate (237-349)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Cooler. Partly cloudy. Lows 44 to 51. Highs 56 to 69.
West winds 2 to 7 mph.
.WEDNESDAY...Partly cloudy. Lows 38 to 45. Highs 51 to 64. West
winds 3 to 8 mph.
.THURSDAY...Mostly cloudy. Lows 37 to 43. Highs 53 to 64.
Northwest winds 1 to 6 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 40 to 46.
Highs 47 to 59. West winds 1 to 6 mph.
.SATURDAY...A slight chance of showers. Mostly cloudy. Lows 34 to
40. Highs 46 to 57. West winds 2 to 7 mph.
$$
WAZ690-202315-
Kittitas Valley-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....76-82...except 67-76 ridges.
* Min humidity........31-37 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.......5000 ft agl.
* Transport winds.....North around 5 mph shifting to the south in
the afternoon.
* Ventilation Index...Low (25-28) increasing to low to moderate
(143-209) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....52-57.
* Max humidity........56-71 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.....South around 5 mph shifting to the northwest
after midnight.
* Ventilation Index...Low (26-44) decreasing to low (25) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
* Max temperature.....77-83...except 69-77 ridges.
* Min humidity........31-39 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.....West around 5 mph.
* Ventilation Index...Low (25-35) increasing to low to moderate
(153-225) in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 52 to 57. Highs 70 to 78.
Northwest winds 4 to 9 mph.
.WEDNESDAY...Partly cloudy. Lows 46 to 51. Highs 64 to 72.
Northwest winds 4 to 10 mph.
.THURSDAY...Partly cloudy. Lows 44 to 49. Highs 61 to 68.
Northwest winds 1 to 6 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
46 to 51. Highs 59 to 67. West winds 1 to 6 mph.
.SATURDAY...Partly cloudy. Lows 41 to 46. Highs 56 to 63.
Northwest winds 2 to 7 mph.
$$
WAZ694-202315-
Yakama Alpine District-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....76-83...except 67-78 ridges.
* Min humidity........27-33 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.......5500 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (25-31) increasing to low to moderate
(194-236) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....49-56.
* Max humidity........51-66 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.....Southeast around 5 mph shifting to the
northwest after midnight.
* Ventilation Index...Low (30-56) decreasing to low (25-27) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
* Max temperature.....77-83...except 68-79 ridges.
* Min humidity........28-38 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.......6000 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (25-32) increasing to moderate (261-347)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 45 to 52. Highs 63 to 76. West
winds 2 to 7 mph.
.WEDNESDAY...Partly cloudy. Lows 39 to 46. Highs 58 to 70. West
winds 3 to 8 mph.
.THURSDAY...Partly cloudy. Lows 39 to 46. Highs 58 to 70. West
winds 1 to 6 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 42 to 49.
Highs 52 to 64. West winds 1 to 6 mph.
.SATURDAY...A slight chance of showers. Partly cloudy. Lows 36 to
43. Highs 50 to 62. West winds 2 to 7 mph.
$$
ORZ691-WAZ691-202315-
Lower Columbia Basin of Oregon-Lower Columbia Basin of Washington-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....80-85...except 75-81 ridges.
* Min humidity........25-33 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming northeast 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.......6000 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (25-32) increasing to low (95-181) in the
afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....53-58.
* Max humidity........58-73 percent.
* 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....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northeast around 5 mph.
* Ventilation Index...Low (32-94) decreasing to low (25-29) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
* Max temperature.....81-86...except 76-82 ridges.
* Min humidity........26-33 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.......6500 ft agl.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Low (25-35) increasing to low to moderate
(138-206) in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 52 to 57. Highs 73 to 81.
Southwest winds 4 to 9 mph.
.WEDNESDAY...Partly cloudy. Lows 48 to 53. Highs 69 to 76.
Southwest winds 5 to 11 mph.
.THURSDAY...Partly cloudy. Lows 47 to 52. Highs 68 to 75. West
winds 2 to 7 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
48 to 53. Highs 65 to 72. West winds 2 to 7 mph.
.SATURDAY...Partly cloudy. Lows 43 to 48. Highs 60 to 68. West
winds 4 to 9 mph.
$$
ORZ692-WAZ692-202315-
Northern Blue Mountains of Oregon-Blue Mountains of Washington-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....75-83...except 69-75 ridges.
* Min humidity........28-39 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.....Southeast around 5 mph.
* Ventilation Index...Low (29-57) increasing to low to moderate
(96-224) in the afternoon.
.TONIGHT...
* Sky/weather.........Clear.
* Min temperature.....48-57.
* Max humidity........54-69 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph becoming
southeast up to 5 mph after midnight.
* Ridges/upr slopes....light winds less than 5 mph becoming
southeast up to 5 mph after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....East 5 to 10 mph.
* Ventilation Index...Low (45-73) decreasing to low (26-40) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-84...except 70-76 ridges.
* Min humidity........27-36 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds up to 5 mph in the morning
becoming upslope less than 5 mph.
* Ridges/upr slopes....South winds 1 to 5 mph in the morning
becoming light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Low (39-69) increasing to moderate (220-408)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 49 to 57. Highs 68 to 78.
Southwest winds up to 5 mph.
.WEDNESDAY...Partly cloudy. Lows 43 to 52. Highs 62 to 72.
Southwest winds up to 5 mph.
.THURSDAY...Partly cloudy. Lows 42 to 49. Highs 66 to 76. Terrain
driven winds less than 5 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
45 to 52. Highs 60 to 70. Southwest winds 1 to 6 mph.
.SATURDAY...A slight chance of showers. Mostly cloudy. Lows 39 to
46. Highs 53 to 63. West winds 1 to 6 mph.
$$
ORZ693-WAZ693-202315-
Canyon Grasslands of Wallowa County-
Southeast Washington Grande Ronde Valley-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....75-83...except 68-75 ridges.
* Min humidity........25-31 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....Southeast winds 1 to 5 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.....Southeast around 5 mph.
* Ventilation Index...Low (26-36) increasing to low to moderate
(158-218) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....45-55.
* Max humidity........58-73 percent.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....East winds 1 to 6 mph shifting to the south
2 to 7 mph after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (53-81) decreasing to low (25-26) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-86...except 70-77 ridges.
* Min humidity........23-28 percent.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 1 to 5 mph in the morning
becoming upslope less than 5 mph.
* Ridges/upr slopes....South winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (26-58) increasing to moderate (331-493)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 47 to 57. Highs 73 to 82.
Southwest winds up to 5 mph.
.WEDNESDAY...Partly cloudy. Lows 44 to 53. Highs 68 to 77.
Terrain driven winds less than 5 mph.
.THURSDAY...Partly cloudy. Lows 42 to 50. Highs 72 to 81. South
winds 1 to 6 mph.
.FRIDAY...Partly cloudy with a slight chance of showers. Lows
45 to 53. Highs 67 to 77. Southwest winds 3 to 8 mph.
.SATURDAY...Cooler. Mostly cloudy with a slight chance of
showers. Lows 39 to 48. Highs 57 to 66. Northwest winds 2 to
7 mph.
$$
ORZ701-202315-
Eastern Columbia River Gorge of Oregon-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....81-86.
* Min humidity........26-34 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.....Southeast around 5 mph.
* Ventilation Index...Low (25-26) increasing to low to moderate
(168-214) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....52-57.
* Max humidity........62-77 percent.
* 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....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northeast around 5 mph shifting to the
northwest after midnight.
* Ventilation Index...Low (25-80).
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....79-84.
* Min humidity........30-44 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.......5500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-37) increasing to low to moderate
(189-225) in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 48 to 54. Highs 71 to 76. West
winds 4 to 10 mph.
.WEDNESDAY...Partly cloudy. Lows 44 to 49. Highs 69 to 74. West
winds 5 to 11 mph.
.THURSDAY...Partly cloudy. Lows 44 to 49. Highs 69 to 74.
Northwest winds 2 to 7 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
46 to 51. Highs 63 to 68. West winds 1 to 6 mph.
.SATURDAY...Partly cloudy with a slight chance of showers. Lows
41 to 46. Highs 61 to 66. West winds 2 to 7 mph.
$$
ORZ702-202315-
East Slopes of the Mt. Hood National Forest-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-83...except 71-79 ridges.
* Min humidity........26-34 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.......4500 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (25-37) increasing to moderate (207-257)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....51-57.
* Max humidity........54-69 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.....East around 5 mph.
* Ventilation Index...Low (57-83) decreasing to low (25-28) after
midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....77-83...except 71-78 ridges.
* Min humidity........31-42 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.....West 5 to 10 mph.
* Ventilation Index...Low (25-30) increasing to moderate (205-263)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 45 to 52. Highs 60 to 75. West
winds up to 5 mph.
.WEDNESDAY...Partly cloudy. Lows 38 to 45. Highs 58 to 71. West
winds up to 5 mph.
.THURSDAY...Partly cloudy. Lows 39 to 45. Highs 60 to 71. Terrain
driven winds less than 5 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 42 to 48.
Highs 52 to 65. Terrain driven winds less than 5 mph.
.SATURDAY...A slight chance of showers. Mostly cloudy. Lows 36 to
42. Highs 50 to 62. Terrain driven winds less than 5 mph.
$$
ORZ695-202315-
Eagle Cap Wilderness-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....70-80...except 59-69 ridges.
* Min humidity........30-42 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.......6000 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (25-37) increasing to low to moderate
(157-247) in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....49-54...except 43-49 ridges.
* Max humidity........56-69 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 becoming south 2
to 7 mph after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (32-54) decreasing to low (25-29) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
* Max temperature.....71-81...except 61-71 ridges.
* Min humidity........27-38 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 2
to 5 mph in the afternoon.
* Ridges/upr slopes....South winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....South 5 to 10 mph.
* Ventilation Index...Low (36-82) increasing to moderate (341-473)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 46 to 54. Highs 63 to 78. South
winds 1 to 5 mph.
.WEDNESDAY...Partly cloudy. Lows 43 to 50. Highs 60 to 74. West
winds 1 to 6 mph.
.THURSDAY...Partly cloudy. Lows 41 to 48. Highs 63 to 77.
Southeast winds 4 to 9 mph.
.FRIDAY...Partly cloudy. Lows 45 to 52. Highs 58 to 73. South
winds 4 to 10 mph.
.SATURDAY...Mostly cloudy. Lows 37 to 45. Highs 50 to 64.
Northwest winds 2 to 7 mph.
$$
ORZ694-202315-
Grande Ronde Valley of Oregon-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-83.
* Min humidity........26-31 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.......5000 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (25-29) increasing to low to moderate
(174-234) in the afternoon.
.TONIGHT...
* Sky/weather.........Clear.
* Min temperature.....46-51.
* Max humidity........68-77 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 becoming south 2
to 6 mph after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (34-54) decreasing to low (25-27) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....79-85.
* Min humidity........24-29 percent.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 2 to 7 mph.
* Ridges/upr slopes....Southeast winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6500 ft agl.
* Transport winds.....South around 10 mph.
* Ventilation Index...Low (34-56) increasing to moderate (364-426)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 47 to 52. Highs 78 to 83. Terrain
driven winds less than 5 mph.
.WEDNESDAY...Partly cloudy. Lows 43 to 48. Highs 73 to 78.
Northwest winds 1 to 6 mph.
.THURSDAY...Partly cloudy. Lows 42 to 47. Highs 77 to 82.
Northwest winds 3 to 8 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
45 to 50. Highs 72 to 77. South winds 3 to 8 mph.
.SATURDAY...Mostly cloudy. Lows 40 to 45. Highs 63 to 68.
Northwest winds 4 to 9 mph.
$$
ORZ699-202315-
Western Forested Blue Mountains-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....75-81...except 69-75 ridges.
* Min humidity........26-34 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.....Southeast around 5 mph.
* Ventilation Index...Low (27-49) increasing to moderate (215-319)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....46-52.
* Max humidity........57-70 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds up to 5 mph.
* Ridges/upr slopes....Southeast winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Southeast around 10 mph.
* Ventilation Index...Low (72-112) decreasing to low (25-32) after
midnight.
.MONDAY...
* Sky/weather.........Mostly sunny then becoming partly cloudy.
* Max temperature.....76-82...except 70-76 ridges.
* Min humidity........24-31 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....Southeast winds 1 to 6 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.....South around 5 mph.
* Ventilation Index...Low (36-64) increasing to moderate (264-402)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 47 to 53. Highs 68 to 77. Terrain
driven winds less than 5 mph.
.WEDNESDAY...Partly cloudy. Lows 42 to 47. Highs 63 to 72.
Terrain driven winds less than 5 mph.
.THURSDAY...Partly cloudy. Lows 41 to 46. Highs 67 to 77. East
winds up to 5 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
44 to 50. Highs 61 to 70. South winds 1 to 6 mph.
.SATURDAY...Mostly cloudy. Lows 37 to 42. Highs 53 to 62.
Northwest winds 1 to 6 mph.
$$
ORZ696-202315-
John Day Valley-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-84...except 72-77 ridges.
* Min humidity........22-27 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.....Southeast around 5 mph.
* Ventilation Index...Low (28-42) increasing to moderate (244-338)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....48-53.
* Max humidity........56-68 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph becoming
southeast 1 to 6 mph after midnight.
* Ridges/upr slopes....Southeast winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....East around 5 mph.
* Ventilation Index...Low (87-115) decreasing to low (25-30) after
midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....77-85...except 73-78 ridges.
* Min humidity........21-26 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....Southeast winds 2 to 6 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.....Southeast around 5 mph shifting to the
southwest in the afternoon.
* Ventilation Index...Low (30-46) increasing to low to moderate
(188-286) in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 49 to 54. Highs 72 to 81. Terrain
driven winds less than 5 mph.
.WEDNESDAY...Partly cloudy. Lows 44 to 49. Highs 66 to 76.
Northwest winds 1 to 6 mph.
.THURSDAY...Partly cloudy. Lows 42 to 47. Highs 72 to 82. Terrain
driven winds less than 5 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
45 to 50. Highs 64 to 73. Southwest winds 1 to 6 mph.
.SATURDAY...Mostly cloudy. Lows 39 to 44. Highs 57 to 66.
Northwest winds 2 to 7 mph.
$$
ORZ700-202315-
Central Mountains of Oregon-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....77-83...except 71-76 ridges.
* Min humidity........21-26 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds 1 to 6 mph.
* Ridges/upr slopes....Southeast winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....Southeast 5 to 10 mph.
* Ventilation Index...Low (27-47) increasing to moderate (270-484)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....43-52.
* Max humidity........58-71 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.....Southeast 5 to 10 mph.
* Ventilation Index...Low (98-170) decreasing to low (25-33) after
midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....78-83...except 71-76 ridges.
* Min humidity........19-26 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.......8000 ft agl.
* Transport winds.....Southeast around 5 mph shifting to the
southwest in the afternoon.
* Ventilation Index...Low (27-45) increasing to low to moderate
(155-291) in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 43 to 51. Highs 72 to 78.
Northwest winds up to 5 mph.
.WEDNESDAY...Partly cloudy. Lows 38 to 45. Highs 67 to 73.
Northwest winds 1 to 6 mph.
.THURSDAY...Partly cloudy. Lows 37 to 45. Highs 72 to 79. West
winds 1 to 6 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
39 to 47. Highs 63 to 70. Southwest winds 3 to 8 mph.
.SATURDAY...Mostly cloudy. Lows 34 to 41. Highs 57 to 64. North
winds 3 to 8 mph.
$$
ORZ703-202315-
Warm Springs Reservation-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....79-86...except 69-77 ridges.
* Min humidity........23-30 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.......6000 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (25-31) increasing to moderate (204-292)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....52-57.
* Max humidity........57-65 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.....North 5 to 10 mph.
* Ventilation Index...Low (81-115) decreasing to low (25) after
midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....79-87...except 69-77 ridges.
* Min humidity........25-36 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.....West around 5 mph.
* Ventilation Index...Low (25-28) increasing to low to moderate
(156-304) in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 47 to 52. Highs 66 to 79. West
winds 2 to 7 mph.
.WEDNESDAY...Partly cloudy. Lows 41 to 46. Highs 64 to 74. West
winds 4 to 10 mph.
.THURSDAY...Partly cloudy. Lows 42 to 47. Highs 66 to 75.
Northwest winds up to 5 mph.
.FRIDAY...Mostly cloudy with a slight chance of showers. Lows
44 to 49. Highs 57 to 69. West winds 1 to 6 mph.
.SATURDAY...A slight chance of showers. Mostly cloudy. Lows 38 to
43. Highs 54 to 64. Northwest winds 2 to 7 mph.
$$
ORZ704-202315-
Northern Deschutes National Forest-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....78-84...except 68-75 ridges.
* Min humidity........23-33 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.......6500 ft agl.
* Transport winds.....Southeast 5 to 10 mph.
* Ventilation Index...Low (25-37) increasing to moderate (293-343)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....46-52.
* Max humidity........61-69 percent...except 48-61 percent ridges.
* 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.....Northeast around 10 mph shifting to the
northwest after midnight.
* Ventilation Index...Low (78-118) decreasing to low (25-26) after
midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....79-84...except 67-76 ridges.
* Min humidity........25-37 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.......7500 ft agl.
* Transport winds.....Southwest around 5 mph.
* Ventilation Index...Low (25-32) increasing to moderate (227-339)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 43 to 49. Highs 63 to 75. West
winds 1 to 6 mph.
.WEDNESDAY...Partly cloudy. Lows 36 to 42. Highs 60 to 72. West
winds 1 to 6 mph.
.THURSDAY...Partly cloudy. Lows 37 to 43. Highs 64 to 75. Terrain
driven winds less than 5 mph.
.FRIDAY...Cooler. Mostly cloudy with a chance of showers. Lows
39 to 46. Highs 53 to 65. West winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a slight chance of showers. Lows
34 to 40. Highs 50 to 61. Northeast winds 1 to 6 mph.
$$
ORZ705-202315-
Southern Deschutes National Forest-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....75-80...except 66-74 ridges.
* Min humidity........20-28 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.......7000 ft agl.
* Transport winds.....Southeast 5 to 10 mph.
* Ventilation Index...Low (25-48) increasing to moderate (328-402)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....39-48.
* Max humidity........59-74 percent...except 45-58 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....0 percent.
* Mixing height.......Near surface.
* Transport winds.....East around 5 mph.
* Ventilation Index...Low (75-155) decreasing to low (25-29) after
midnight.
.MONDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....76-81...except 67-75 ridges.
* Min humidity........20-30 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.....South around 5 mph.
* Ventilation Index...Low (25-38) increasing to moderate (268-350)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 38 to 46. Highs 65 to 75. Terrain
driven winds less than 5 mph.
.WEDNESDAY...Partly cloudy. Lows 33 to 40. Highs 62 to 72. West
winds up to 5 mph.
.THURSDAY...Partly cloudy. Lows 33 to 41. Highs 67 to 77. Terrain
driven winds less than 5 mph.
.FRIDAY...Cooler. Mostly cloudy with a slight chance of showers.
Lows 36 to 43. Highs 55 to 65. Southwest winds 1 to 6 mph.
.SATURDAY...Mostly cloudy. Lows 30 to 36. Highs 53 to 61.
Northeast winds 1 to 6 mph.
$$
ORZ697-202315-
Central Blue Mountains-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....73-78...except 67-74 ridges.
* Min humidity........24-32 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.....Southeast around 5 mph.
* Ventilation Index...Low (34-60) increasing to moderate (301-389)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....42-49.
* Max humidity........58-69 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 becoming
southeast up to 5 mph after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Southeast 5 to 10 mph.
* Ventilation Index...Low (100-140) decreasing to low (25-30) after
midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....74-79...except 68-75 ridges.
* Min humidity........22-27 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....Southeast winds 1 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.....South around 5 mph.
* Ventilation Index...Low (47-63) increasing to moderate (295-367)
in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 44 to 51. Highs 70 to 77. Terrain
driven winds less than 5 mph.
.WEDNESDAY...Partly cloudy. Lows 41 to 47. Highs 67 to 73.
Northwest winds up to 5 mph.
.THURSDAY...Partly cloudy. Lows 40 to 46. Highs 71 to 78.
Southeast winds 1 to 6 mph.
.FRIDAY...Partly cloudy. Lows 43 to 50. Highs 64 to 70. South
winds 2 to 7 mph.
.SATURDAY...Mostly cloudy. Lows 36 to 42. Highs 57 to 63.
Northwest winds 2 to 7 mph.
$$
ORZ698-202315-
Southern Blue Mountains-
538 AM PDT Sun Sep 20 2026
.TODAY...
* Sky/weather.........Mostly sunny.
* Max temperature.....73-78...except 68-73 ridges.
* Min humidity........22-27 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds 1 to 6 mph.
* Ridges/upr slopes....Southeast winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....Southeast 5 to 10 mph.
* Ventilation Index...Low (33-57) increasing to moderate (328-442)
in the afternoon.
.TONIGHT...
* Sky/weather.........Mostly clear.
* Min temperature.....42-48.
* Max humidity........60-70 percent.
* 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....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....East around 10 mph.
* Ventilation Index...Low (121-169) decreasing to low (26-36) after
midnight.
.MONDAY...
* Sky/weather.........Partly cloudy.
* Max temperature.....75-80.
* Min humidity........18-23 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.......8000 ft agl.
* Transport winds.....East around 5 mph shifting to the south in
the afternoon.
* Ventilation Index...Low (38-56) increasing to low to moderate
(188-324) in the afternoon.
.Forecast days 3 through 7......
.TUESDAY...Partly cloudy. Lows 43 to 50. Highs 75 to 81. North
winds 1 to 6 mph.
.WEDNESDAY...Partly cloudy. Lows 41 to 48. Highs 71 to 78.
Northwest winds 1 to 6 mph.
.THURSDAY...Partly cloudy. Lows 39 to 47. Highs 75 to 81. North
winds 1 to 6 mph.
.FRIDAY...Partly cloudy. Lows 42 to 50. Highs 68 to 76. Southwest
winds 3 to 8 mph.
.SATURDAY...Mostly cloudy. Lows 36 to 43. Highs 61 to 68.
Northwest winds 3 to 8 mph.
$$
.8-14 DAY OUTLOOK for Sunday September 27 through Saturday October 3...
A greater chance of near normal to above normal temperatures and
above normal precipitation.
$$