555
FNUS76 KOTX 071111
FWSOTX
SPOT FORECAST FOR NORTH HULL RX...USFS
NATIONAL WEATHER SERVICE SPOKANE WA
411 AM PDT WED OCT 7 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 PDT ON OCTOBER 07.
DISCUSSION
UNSEASONABLY WARM AND DRY WITH LOW RELATIVE HUMIDITY VALUES
TODAY. A STRONG INVERSION UNDER HIGH PRESSURE WILL RESULT IN
A SLOW LIFTING OF THE INVERSION. WINDS WILL INCREASE SLIGHTLY
FROM THE SOUTH, BUT VENTILATION WILL REMAIN LOW WITH MIXING
HEIGHTS STRUGGLING TO REACH 2000 FT AGL THIS AFTERNOON. FAIR
RELATIVE HUMIDITY RECOVERY AT NIGHT. A SLIGHT INCREASE IN
WINDS ON THURSDAY BRINGS SOME VENTILATION IMPROVEMENT. A COLD
FRONT ASSOCIATED WITH A LOW PRESSURE SYSTEM ARRIVES FRIDAY,
BRINGING BREEZY AND DRY CONDITIONS. A 50 PERCENT CHANCE OF
RAIN SHOWERS BY SATURDAY. RAIN ACCUMULATIONS WILL BE LIGHT
WITH A 25 PERCENT CHANCE FOR WETTING RAINS.
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 SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....74.
MIN HUMIDITY........17-21 PERCENT.
WIND (20 FT)........SOUTH-SOUTHEAST WINDS 1 TO 4 MPH IN THE
MORNING BECOMING SOUTHWEST 3 TO 7 MPH AFTER
1230. GUSTS UP TO 12 MPH IN THE AFTERNOON.
MIXING HEIGHT.......INVERSION LIFTS AROUND 1130. MIXING HEIGHT
INCREASING TO 1800 FT AGL BETWEEN 1400 AND
1600 HOURS.
TRANSPORT WINDS.....SOUTH AROUND 4 MPH IN THE MORNING BECOMING
SOUTH-SOUTHWEST 5 TO 8 MPH IN THE AFTERNOON.
VENTILATION INDEX...LOW (94).
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....46.
MAX HUMIDITY........62-66 PERCENT.
WIND (20 FT)........SOUTH-SOUTHWEST WINDS 3 TO 6 MPH EARLY IN
THE EVENING BECOMING SOUTH-SOUTHEAST 1 TO
4 MPH AFTER 1800.
MIXING HEIGHT.......1400 FT AGL EARLY IN THE EVENING DECREASING
TO NEAR SURFACE AFTER 1900.
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.
VENTILATION INDEX...LOW (19).
THURSDAY
SKY/WEATHER.........PARTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....73.
MIN HUMIDITY........25-29 PERCENT.
WIND (20 FT)........SOUTH-SOUTHEAST WINDS 2 TO 5 MPH IN THE
MORNING BECOMING SOUTH 5 TO 9 MPH AFTER
1200. GUSTS UP TO 15 MPH IN THE AFTERNOON.
MIXING HEIGHT.......INVERSION LIFTS AROUND 1130. MIXING HEIGHT
INCREASING TO 2000 FT AGL BETWEEN 1400 AND
1600 HOURS.
TRANSPORT WINDS.....SOUTH AROUND 5 MPH SHIFTING TO THE
SOUTHWEST AROUND 9 MPH IN THE AFTERNOON.
VENTILATION INDEX...LOW (171).
FORECASTER...SVH
REQUESTED BY...TAYLOR ORTEG
TYPE OF REQUEST...PRESCRIBED
.TAG 2623084.2/OTX
.DELDT 10/07/26
.FORMATTERVERSION 2.0.0
.EMAIL TAYLOR.ORTEG@USDA.GOV
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