494
FNUS76 KOTX 092200
FWSOTX
SPOT FORECAST FOR DUDLEY FIRE...USFS
NATIONAL WEATHER SERVICE SPOKANE WA
300 PM PDT WED SEP 9 2026
FORECAST IS BASED ON FORECAST START TIME OF 1800 PDT ON SEPTEMBER 09.
DISCUSSION
WEAK HIGH PRESSURE GIVES WAY TO ANOTHER COLD FRONT AND AREA OF LOW
PRESSURE MOVING IN THURSDAY. WINDS SHIFT TO THE SOUTHEAST TONIGHT AND
GRADUALLY INCREASE AND REMAIN BREEZY THURSDAY, ESPECIALLY IN THE
AFTERNOON. PASSING SHOWER CHANCES COME THURSDAY, WITH A SLIGHTLY
BETTER THURSDAY NIGHT. FRIDAY LOOKS DRIER, THOUGH SOME SHOWERS ARE
POSSIBLE TO THE NORTH OF THE FIRE AND WE WILL HAVE TO MONITOR TRENDS
SHOULD THAT RISK COME FURTHER SOUTH. A WETTER SYSTEM COMES THIS WEEKEND,
WITH RAIN BECOMING LIKELY SATURDAY NIGHT INTO SUNDAY. THERE IS A GOOD
CHANCE OF WETTING RAINS, WITH OVER A HALF INCH OF RAIN FORECAST. THERE
IS ABOUT A 10-15% CHANCE OF THUNDERSTORMS. EXPECT BREEZY CONDITIONS
SATURDAY AS WELL.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
***************************************************************
FORECASTS FOR 20 FOOT WIND SPEEDS (VALLEYS AND RIDGE TOPS) ARE
10 MINUTE AVERAGES REFLECTING RAWS WIND.
***VENTILATION INDEX IS DERIVED FROM TRANSPORT WIND
MULTIPLIED BY THE MIXING HEIGHT DIVIDED BY 100.
CATEGORIES: LOW (< 200), MODERATE (200-500),
HIGH (500-800), AND VERY HIGH (> 800).
***************************************************************
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........62-69 PERCENT.
WIND (20 FT)........VARIABLE 2 TO 5 MPH, WITH RIDGETOP GUSTS TO 10 MPH
BEFORE 2100...BECOMING SOUTHEAST 4 TO 7 MPH WITH
GUSTS TO 11 MPH VALLEYS AND 8 TO 14 MPH WITH
GUSTS TO 18 MPH RIDGETOPS.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 10 MPH.
VENTILATION INDEX...LOW (143).
THURSDAY
SKY/WEATHER.........PARTLY CLOUDY BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....69-75.
MIN HUMIDITY........37 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 6 MPH SHIFTING TO THE WEST 7
TO 14 MPH WITH GUSTS 18-23 MPH AFTER 1100.
MIXING HEIGHT.......3500 FT AGL INCREASING TO 5500 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 17 TO 23 MPH.
VENTILATION INDEX...HIGH (603) INCREASING TO VERY HIGH (1201) IN
THE AFTERNOON.
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS.
CWR.................15 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MIN TEMPERATURE.....AROUND 46.
MAX HUMIDITY........76-89 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 10 MPH WITH GUSTS TO
18 MPH IN THE EVENING BECOMING SOUTH
1 TO 4 MPH WITH GUST TO 9 MPH AT RIDGETOPS.
MIXING HEIGHT.......3500 FT AGL FALLING TO 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 9 MPH.
VENTILATION INDEX...MODERATE (429) DECREASING TO LOW (53)
OVERNIGHT.
FRIDAY
SKY/WEATHER.........PARTLY CLOUDY IN THE MORNING...BECOMING
MOSTLY CLOUDY IN THE AFTERNOON.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....63-68.
MIN HUMIDITY........39 PERCENT.
WIND (20 FT)........SOUTH WIND 1 TO 3 MPH IN THE MORNING, WITH GUSTS
TO 8 MPH AT RIDGETOPS...INCREASING TO WEST
3 TO 6 MPH IN THE AFTERNOON WITH GUSTS TO
12 MPH AT RIDGETOPS.
MIXING HEIGHT.......4000 FT AGL INCREASING TO 6000 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 9 TO 10 MPH.
VENTILATION INDEX...MODERATE (331) INCREASING TO MODERATE (493) IN
THE AFTERNOON.
FORECASTER...MSC
REQUESTED BY...LUKE SMITH
TYPE OF REQUEST...WILDFIRE
.TAG 2620763.13/OTX
.DELDT 09/09/26
.FORMATTERVERSION 2.0.0
.EMAIL GARRETT.PITSENBARGER@USDA.GOV,EVAN.A.RATCLIFFE@USDA.GOV,CHRIS_STETSON@FIRENET.GOV,LANCE.VAELLI@USDA.GOV,MICHAEL.STARR@USDA.GOV,LUKE.SMITH2@USDA.GOV
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