299
FNUS76 KOTX 092248
FWSOTX
SPOT FORECAST FOR CHESTUNUT...DNR
NATIONAL WEATHER SERVICE SPOKANE WA
348 PM PDT TUE JUN 9 2026
FORECAST IS BASED ON FORECAST START TIME OF 1800 PDT ON JUNE 09.
DISCUSSION
WINDS WILL PEAK THIS AFTERNOON WITH GUSTS UP TO 30 MPH IN THE
VALLEYS AND UP TO 40 MPH ALONG THE RIDGETOPS. WINDS WILL GRADUALLY
DECREASE AFTER 2000 HOURS, BUT REMAIN BREEZY THROUGH THE NIGHT.
DRIER AND WARMER CONDITIONS WITH LESS CLOUD COVER IS EXPECTED FOR
WEDNESDAY. WINDS WILL REMAIN BREEZY OUT OF THE WEST THROUGH THE
MIDDLE OF THE MORNING, SHIFTING TO THE NORTHWEST AFTER 0900 HOURS.
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.....48.
MAX HUMIDITY........63-68 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 17 MPH WITH GUSTS TO AROUND 25
MPH.
MIXING HEIGHT.......4500 FT AGL FALLING TO 500 FT AGL.
TRANSPORT WINDS.....WEST 12 TO 21 MPH.
VENTILATION INDEX...VERY HIGH (1074) DECREASING TO LOW (52)
OVERNIGHT.
WEDNESDAY
SKY/WEATHER.........PARTLY CLOUDY BECOMING MOSTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....69-74.
MIN HUMIDITY........28-33 PERCENT.
WIND (20 FT)........WEST WINDS 8 TO 11 MPH WITH GUSTS TO 16 MPH
SHIFTING TO THE NORTHWEST 9 TO 14 MPH WITH GUSTS
TO 22 MPH AFTER 0900-1100.
MIXING HEIGHT.......6500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 13 MPH.
VENTILATION INDEX...HIGH (629) INCREASING TO HIGH (708) IN THE
AFTERNOON.
FORECASTER...VT
REQUESTED BY...CWICC
TYPE OF REQUEST...WILDFIRE
.TAG 2615238.0/OTX
.DELDT 06/09/26
.FORMATTERVERSION 2.0.0
.EMAIL WACWC@FIRENET.GOV
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