040
FNUS76 KOTX 031203
FWSOTX
SPOT FORECAST FOR HENDERSON...WASHINGTON DNR
NATIONAL WEATHER SERVICE SPOKANE WA
503 AM PDT FRI JUL 3 2026
FORECAST IS BASED ON FORECAST START TIME OF 0700 PDT ON JULY 03.
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING...
DISCUSSION
WINDS ARE EXPECTED TO INCREASE OUT OF THE SOUTHWEST OVER THE
FIRE AREA AGAIN TODAY. A PUSH OF WINDS COMING DOWN LAKE CHELAN IS
EXPECTED TO REACH THE FIRE AREA THIS EVENING, WITH WIND DIRECTION
SHIFTING TO WEST AND NORTHWEST. CRITICAL FIRE WEATHER CONDITIONS
ARE POSSIBLE ON SATURDAY (INDEPEDENCE DAY) AS STRONGER SOUTHWEST
WINDS DEVELOP, WHICH WILL COMBINE WITH RELATIVE HUMIDITY FALLING
INTO THE TEENS.
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.....AROUND 84.
MIN HUMIDITY........21-26 PERCENT.
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY 1 TO 4 MPH THROUGH 0900
THEN SOUTHWEST 5 TO 8 MPH 0900-1400, THEN
INCREASING TO 7 TO 12 MPH WITH GUSTS TO 18 MPH.
MIXING HEIGHT.......NEAR SURFACE THROUGH 0830 INCREASING TO 7500 FT
AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH INCREASING TO 10 TO 20 MPH
AFTER 1500.
VENTILATION INDEX...MODERATE (314) INCREASING TO VERY HIGH (843) IN
THE AFTERNOON.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 58.
MAX HUMIDITY........53 PERCENT.
WIND (20 FT)........SOUTHWEST 8 TO 15 MPH THROUGH 2000 THEN SHIFTING TO
NORTHWEST 10 TO 15 MPH 2000-2300, THEN NORTHWEST 2
TO 7 MPH. GUSTS UP TO 25 MPH IN THE EVENING.
MIXING HEIGHT.......5000 FT AGL FALLING TO 500 FT AGL NEAR 2000.
TRANSPORT WINDS.....WEST 10 TO 20 MPH IN THE EVENING DECREASING TO
5 TO 10 MPH.
VENTILATION INDEX...HIGH (672) DECREASING TO LOW (35) OVERNIGHT.
INDEPENDENCE DAY
SKY/WEATHER.........PARTLY CLOUDY THROUGH 0900 THEN SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........17 PERCENT.
WIND (20 FT)........VARIABLE 2 TO 5 MPH THROUGH 1000 THEN BECOMING
SOUTHWEST AND INCREASING TO 10 TO 18 MPH WITH GUSTS
UP TO 30 MPH IN THE AFTERNOON.
MIXING HEIGHT.......1000 FT AGL THROUGH 0800 THEN INCREASING TO 5500 FT
AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH IN THE MORNING INCREASING TO
AROUND 20 MPH IN THE AFTERNOON.
VENTILATION INDEX...MODERATE (459) INCREASING TO VERY HIGH (1079)
IN THE AFTERNOON.
FORECASTER...JW
REQUESTED BY...STEVEN REPTSIS
TYPE OF REQUEST...WILDFIRE
.TAG 2616678.0/OTX
.DELDT 07/03/26
.FORMATTERVERSION 2.0.0
.EMAIL STEVEN.REPTSIS@DNR.WA.GOV
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