512
FNUS76 KOTX 021746
FWSOTX
SPOT FORECAST FOR ST. JOE DIVIDE RX...USFS
NATIONAL WEATHER SERVICE SPOKANE WA
1046 AM PDT FRI OCT 2 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 PDT ON OCTOBER 03.
DISCUSSION
WEAK HIGH PRESSURE BUILDS IN OVER THE WEEKEND, WITH MINOR UPPER
WAVES RIPPLING THROUGH IT. THAT WILL RESULT IN DRY CONDITIONS,
VARIABLE CLOUDS AND MILD TEMPERATURES. WINDS ARE FORECAST TO BE
DIURNALLY-DRIVEN, WITH SOME SLIGHTLY HIGHER DOWNSLOPE/DOWNVALLEY
NORTHEAST WINDS IN THE LATE EVENING INTO THE EARLY MORNING HOURS
THEN TURNING UPSLOPE IN THE AFTERNOON. MONDAY WILL BE A COUPLE
DEGREES COOLER AND RELATIVE HUMIDITY A COUPLE PERCENTAGE POINTS
HIGHER, BUT WITH AFTERNOON WINDS SLIGHTLY BREEZIER OUT
OF THE SOUTHWEST WITH A PASSING DRY DISTURBANCE.
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.........PARTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....67-72.
MIN HUMIDITY........34-37 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 4 TO 7 MPH IN THE MORNING...
WITH GUSTS TO 10 MPH NEAR THE RIDGETOPS...
BECOMING UPSLOPE/UPVALLEY 2 TO 6 MPH
AFTER 1000.
MIXING HEIGHT.......NEAR THE SURFACE IN THE MORNING WITH THE
INVERSION BREAKING AROUND 1000-1100 AND
RISING TO 3500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST 5 TO 7 MPH.
VENTILATION INDEX...MODERATE (200).
SATURDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........60 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 4 TO 7 MPH...WITH
GUSTS TO 10 MPH ON THE RIDGETOPS.
MIXING HEIGHT.......DROPPING TO NEAR THE SURFACE AFTER
2000.
TRANSPORT WINDS.....EAST 6 TO 7 MPH.
VENTILATION INDEX...LOW (26).
SUNDAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....72-76.
MIN HUMIDITY........30-34 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 4 TO 7 MPH WITH GUSTS
TO 10 MPH ON THE RIDGETOPS IN THE MORNING
...BECOMING UPSLOPE/VALLEY 2 TO 6 MPH
AFTER 1100.
MIXING HEIGHT.......NEAR THE SURFACE IN THE MORNING WITH THE
INVERSION BREAKING AROUND 1100 AND
RISING TO 4000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 7 MPH SHIFTING TO THE
SOUTHWEST AROUND 9 MPH IN THE AFTERNOON.
VENTILATION INDEX...LOW (108) INCREASING TO MODERATE (476) IN THE
AFTERNOON.
FORECASTER...MSC
REQUESTED BY...MARSHALL MYHRE
TYPE OF REQUEST...PRESCRIBED
.TAG 2622970.0/OTX
.DELDT 10/02/26
.FORMATTERVERSION 2.0.0
.EMAIL MARSHALL.MYHRE@USDA.GOV
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