497
FNUS76 KOTX 241018
FWSOTX
SPOT FORECAST FOR WILLY...USFS
NATIONAL WEATHER SERVICE SPOKANE WA
318 AM PDT FRI JUL 24 2026
FORECAST IS BASED ON FORECAST START TIME OF 0700 PDT ON JULY 24.
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...
DISCUSSION
TODAY WILL BE DRY AND MOSTLY SUNNY, ASIDE FROM SMOKE AND HAZE.
TEMPERATURE WILL BE WARM TO HOT TODAY, WITH AFTERNOON HUMIDITY
VALUES IN THE MID TO UPPER TEENS. WINDS WILL BE NORTHERLY THIS
MORNING, THEN TURN SOUTHWEST TOWARD MIDDAY AND INCREASE IN THE
AFTERNOON. WINDS SUBSIDE TONIGHT AND RH RECOVERIES WILL BE POOR.
SATURDAY WILL BE RELATIVELY COOLER, BUT HIGHER WINDS ARE EXPECTED
IN THE AFTERNOON BETWEEN 10-20 MPH WITH GUSTS TO 30 MPH POSSIBLE.
COMBINED WITH RH VALUES IN THE MID TO UPPER TEENS, THIS WILL BRING
ELEVATED TO CRITICAL FIRE WEATHER CONDITIONS. SUNDAY AND MONDAY
WILL SEE COOLER TEMPERATURES WITH LINGERING BREEZY AFTERNOON WINDS
WITH GUSTS OF 15-20 MPH.
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).
***************************************************************
TODAY
SKY/WEATHER.........SUNNY. HAZE AND SMOKE.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MAX TEMPERATURE.....84-89.
MIN HUMIDITY........14-19 PERCENT.
WIND (20 FT).........NORTHWEST WINDS 4 TO 8 MPH SHIFTING TO THE
SOUTHWEST AROUND 1100, THEN INCREASING TO
11 TO 16 MPH WITH GUSTS TO AROUND 23 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......5500 FT AGL INCREASING TO 11000 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....WEST 6 TO 15 MPH.
VENTILATION INDEX...MODERATE (326) INCREASING TO VERY HIGH (1770)
IN THE AFTERNOON.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR. HAZE AND AREAS OF SMOKE IN THE
EVENING.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 59.
MAX HUMIDITY........48 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 9 MPH WITH GUSTS TO AROUND 18
MPH THROUGH 2000 THEN DECREASING TO 3 TO 7 MPH
...THEN SHIFTING TO THE NORTHWEST 2 TO 4 MPH
OVERNIGHT.
MIXING HEIGHT.......10000 FT AGL FALLING TO 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 TO 12 MPH.
VENTILATION INDEX...VERY HIGH (1603) DECREASING TO LOW (24)
OVERNIGHT.
SATURDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....79-85.
MIN HUMIDITY........14-19 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 3 TO 6 MPH SHIFTING TO THE
SOUTH 13 TO 20 MPH WITH GUSTS TO AROUND 30 MPH
IN THE AFTERNOON.
MIXING HEIGHT.......8500 FT AGL INCREASING TO 11000 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH INCREASING TO AROUND 21
MPH IN THE AFTERNOON.
VENTILATION INDEX...VERY HIGH (1299) INCREASING TO VERY HIGH (2189)
IN THE AFTERNOON.
FORECASTER...MSC
REQUESTED BY...JASON HEADLEY
TYPE OF REQUEST...WILDFIRE
.TAG 2618081.0/OTX
.DELDT 07/24/26
.FORMATTERVERSION 2.0.0
.EMAIL JASON.HEADLEY@USDA.GOV
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