031
FNUS76 KOTX 261309
FWSOTX
SPOT FORECAST FOR PRICHARD-MURRAY RMEF HAND PILES...USFS
NATIONAL WEATHER SERVICE SPOKANE WA
609 AM PDT MON OCT 26 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON OCTOBER 26.
DISCUSSION
A LOW PRESSURE SYSTEM WILL PUSH INTO THE REGION TODAY (MONDAY)
INTO TONIGHT. AS THIS SYSTEM MOVES IN, WINDS WILL SHIFT OUT OF THE
WEST AND CHANCES FOR SHOWERS WILL INCREASE. THERE IS HIGH
CONFIDENCE IN THE HAND PILE AREAS RECEIVING A WETTING RAIN
(GREATER THAN 0.10 INCHES) BY TUESDAY AFTERNOON WITH TOTAL PRECIP
AMOUNTS OF 0.20-0.40 INCHES EXPECTED. VENTILATION POTENTIAL WILL
BE LOW TO MODERATE.
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.........MOSTLY CLOUDY. 60 PERCENT CHANCE OF RAIN
IN THE AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........40-45 PERCENT.
WIND (20 FT)........EAST-NORTHEAST WINDS 1-4 MPH IN THE MORNING
SHIFTING WEST 5-10 MPH AFTER 1200 HOURS.
MIXING HEIGHT.......INVERSION LIFTING AROUND 1030 HOURS. MIXING
HEIGHT INCREASING TO 3500 FT AGL BY 1300 HOURS.
TRANSPORT WINDS.....WEST 5-10 MPH.
VENTILATION INDEX...MODERATE (289).
TONIGHT
SKY/WEATHER.........CLOUDY. 80 PERCENT CHANCE OF RAIN THROUGH
THE NIGHT.
CWR.................30 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........95-100 PERCENT.
WIND (20 FT)........WEST WINDS 3-7 MPH.
MIXING HEIGHT.......FALLING TO 1500 FT AGL AFTER 1800 HOURS.
TRANSPORT WINDS.....WEST-SOUTHWEST 8-11 MPH.
VENTILATION INDEX...LOW (127).
TUESDAY
SKY/WEATHER.........CLOUDY. 95 PERCENT CHANCE OF RAIN THROUGH
THE DAY.
CWR.................80 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 44.
MIN HUMIDITY........78-83 PERCENT.
WIND (20 FT)........WEST-SOUTHWEST WINDS 7-11 MPH.
MIXING HEIGHT.......INCREASING TO 2500 FT AGL BY 1300 HOURS.
TRANSPORT WINDS.....WEST-SOUTHWEST 18-23 MPH.
VENTILATION INDEX...MODERATE (283).
FORECASTER...RFKS
REQUESTED BY...PATRICK WARKER
TYPE OF REQUEST...PRESCRIBED
.TAG 2624535.0/OTX
.DELDT 10/26/26
.FORMATTERVERSION 2.0.0
.EMAIL EVAN.A.RATCLIFFE@USDA.GOV,PATRICK.WARKER@USDA.GOV,RYAN.NIPP@USDA.GOV
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