864
FNUS76 KOTX 281549
FWSOTX
SPOT FORECAST FOR BORDER...IDCDC
NATIONAL WEATHER SERVICE SPOKANE WA
849 AM PDT FRI AUG 28 2026
FORECAST IS BASED ON FORECAST START TIME OF 0900 PDT ON AUGUST 28.
DISCUSSION
TODAY WILL BE DRY WITH LIGHT, TERRAIN-DRIVEN WINDS AND MOSTLY
SUNNY SKIES ASIDE FROM A FEW PASSING HIGH CLOUDS. TEMPERATURES
WILL BE RELATIVELY COOL IN THE UPPER 60S, AND AFTERNOON RHS WILL
BOTTOM OUT IN THE MID TO UPPER 20S. CLEAR SKIES AND LIGHT WINDS
WILL CONTINUE THROUGH TONIGHT, ALLOWING TEMPERATURES TO FALL INTO
THE UPPER 40S BY SATURDAY MORNING. OVERNIGHT RH RECOVERIES WILL BE
POOR TO FAIR.
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).
***************************************************************
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY IN THE MORNING BECOMING PARTLY
CLOUDY IN THE AFTERNOON. AREAS OF SMOKE
THROUGH THE DAY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........25-29 PERCENT.
WIND (20 FT)........SOUTHWEST 1-4 MPH.
MIXING HEIGHT.......INCREASING TO 7000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST-SOUTHWEST 15-20 MPH.
VENTILATION INDEX...HIGH (560) INCREASING TO VERY HIGH (844)
IN THE AFTERNOON.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR. AREAS OF SMOKE IN THE EVENING
AND OVERNIGHT.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........52-56 PERCENT.
WIND (20 FT)........WEST 1-4 MPH.
MIXING HEIGHT.......FALLING TO 500 FT AGL AROUND 1930.
TRANSPORT WINDS.....WEST-SOUTHWEST 5-10 MPH IN THE EVENING
BECOMING NORTH-NORTHWEST WITH SIMILAR SPEEDS
AFTER 2200.
VENTILATION INDEX...HIGH (590) DECREASING TO LOW (31) OVERNIGHT.
FORECASTER...RFKS
REQUESTED BY...CLEMENSON
TYPE OF REQUEST...WILDFIRE
.TAG 2620805.0/OTX
.DELDT 08/28/26
.FORMATTERVERSION 2.0.0
.EMAIL IDCDC@FIRENET.GOV
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