143
FNUS76 KOTX 112155
FWSOTX
SPOT FORECAST FOR UPPER SMITH SOUTH...CDA DISPATCH
NATIONAL WEATHER SERVICE SPOKANE WA
255 PM PDT FRI SEP 11 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 PDT ON SEPTEMBER 12.
DISCUSSION
SATURDAY WILL BE DRY WITH BREEZY NORTHEAST WINDS. WINDS AND
PRECIPITATION INCREASE SATURDAY NIGHT INTO SUNDAY AS A WEATHER
SYSTEM MOVES IN. THERE IS A SMALL CHANCE (15%) OF THUNDERSTORMS
OVERNIGHT SATURDAY AND THROUGH SUNDAY. OVERALL, EXPECT 0.25-0.75
INCHES OF RAIN AT THE FIRE.
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).
***************************************************************
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....57-61.
MIN HUMIDITY........45-50 PERCENT.
WIND (20 FT)........EAST WINDS 6-10 MPH. GUSTS UP TO 18 MPH ON RIDGETOPS.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....EAST 9 TO 10 MPH.
VENTILATION INDEX...MODERATE (254) INCREASING TO MODERATE (347) IN
THE AFTERNOON.
SATURDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.
RAIN INCREASING OVERNIGHT. 15 PERCENT CHANCE OF
THUNDERSTORMS.
CWR.................10 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MIN TEMPERATURE.....39-43.
MAX HUMIDITY........NEAR 100 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 4-8 MPH. GUSTS UP TO 12 MPH ON
RIDGETOPS.
MIXING HEIGHT.......NEAR SURFACE.
TRANSPORT WINDS.....NORTHEAST 9 TO 10 MPH.
VENTILATION INDEX...MODERATE (204).
SUNDAY
SKY/WEATHER.........CLOUDY. RAIN. 15 PERCENT CHANCE OF THUNDERSTORMS.
RAIN AMOUNTS 0.25-0.75 INCHES.
CWR.................90 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MAX TEMPERATURE.....45-49.
MIN HUMIDITY........90 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS 1-4 MPH.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 8 MPH SHIFTING TO THE
SOUTHWEST AROUND 10 MPH IN THE AFTERNOON.
VENTILATION INDEX...LOW (164).
FORECASTER...DB
REQUESTED BY...STEPHANIE
TYPE OF REQUEST...WILDFIRE
.TAG 2620106.22/OTX
.DELDT 09/11/26
.FORMATTERVERSION 2.0.0
.EMAIL IDCDC@FIRENET.GOV,JEDIDIAH.ADAMS@USDA.GOV
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