711
FNUS76 KOTX 111932
FWSOTX
SPOT FORECAST FOR LIBBY CREEK...USFS
NATIONAL WEATHER SERVICE SPOKANE WA
1232 PM PDT MON MAY 11 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 PDT ON MAY 12.
DISCUSSION
WARM AND DRY CONDITIONS WITH LIMITED CLOUD COVER AND TERRAIN
DRIVEN WINDS EXPECTED THROUGH EARLY TUESDAY. CLOUD COVER BEGINS TO
INCREASE TUESDAY AFTERNOON AHEAD OF AN APPROACHING WEATHER
SYSTEM. CHANCES FOR PRECIPTIATION BEGIN TO INCREASE LATE TUESDAY
NIGHT AND EARLY WEDNESDAY MORNING BUT WITH LOW CHANCES OF A
WETTING RAIN. STRONGER SOUTHWEST TO WEST WINDS ARRIVE WEDNESDAY
AFTERNOON WITH GUSTS 15-25 MPH TOWARD WEDNESDAY EVENING AND
LINGERING INTO EARLY THURSDAY. ANY THUNDERSTORMS THAT DEVELOP NEAR
THE PROJECT WILL BRING A RISK OF GUSTY OUTFLOW WINDS UP TO 35
MPH. PRECIP AMOUNTS OUTSIDE OF THUNDERSTORMS EXPECTED TO BE AROUND
0.03.
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).
***************************************************************
TUESDAY
SKY/WEATHER.........MOSTLY SUNNY. BECOMING PARTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 10 MPH WITH GUSTS NEAR 15
MPH AFTER 1100 PDT. RIDGETOP WIND GUSTS NEAR
25 MPH.
MIXING HEIGHT.......3500 FT AGL INCREASING TO 4500 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST UPSLOPE 10 TO 15 MPH.
VENTILATION INDEX...MODERATE (394) INCREASING TO MODERATE (472) IN
THE AFTERNOON.
TUESDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AFTER
2300 PDT.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.5 PERCENT.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........65 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST 6 TO 8 MPH
OVERNIGHT.
MIXING HEIGHT.......3500 FT AGL FALLING TO 500 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 7 MPH SHIFTING TO THE NORTHWEST
AROUND 10 MPH OVERNIGHT.
VENTILATION INDEX...MODERATE (302) DECREASING TO LOW (49)
OVERNIGHT.
WEDNESDAY
SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS LIKELY IN THE
MORNING, THEN RAIN SHOWERS IN THE AFTERNOON.
CWR.................30 PERCENT.
CHANCE OF LIGHTNING.15 PERCENT.
MAX TEMPERATURE.....AROUND 60.
MIN HUMIDITY........42-47 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 25
MPH.
MIXING HEIGHT.......2500 FT AGL INCREASING TO 3500 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....WEST 18 TO 25 MPH.
VENTILATION INDEX...MODERATE (252) INCREASING TO HIGH (557) IN THE
AFTERNOON.
FORECASTER...JCLEV
REQUESTED BY...KATY GIDDINGS
TYPE OF REQUEST...WILDFIRE
.TAG 2613184.3/OTX
.DELDT 05/11/26
.FORMATTERVERSION 2.0.0
.EMAIL BEN.YOUNG@USDA.GOV,BRIAN.D.CAMPBELL@USDA.GOV,MARY.GIDDINGS@USDA.GOV,REBBECCA.FRY@USDA.GOV,TIMOTHY.DELPH@USDA.GOV
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