165
FNUS76 KOTX 052124
FWSOTX
SPOT FORECAST FOR CHELAN FALLS...SEWAIMT TEAM 1
NATIONAL WEATHER SERVICE SPOKANE WA
224 PM PDT SUN JUL 5 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 PDT ON JULY 06.
...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...
DISCUSSION
HOT AND DRY CONDITIONS WILL PREVAIL OVER THE SITE OVER THE NEXT
SEVERAL DAYS, WITH AREAS PUSHING 100 IN THE VALLEYS. RELATIVE
HUMIDITY VALUES WILL DECREASE AND BOTTOM OUT AS A DRY FRONT PUSHES
TOWARD THE REGION AND PASSES TUESDAY NIGHT INTO WEDNESDAY MORNING.
WINDS WILL INCREASE THROUGH THE DAY TUESDAY, WITH VERY DRY
RELATIVE HUMIDITY VALUES BRINGING NEAR CRITICAL FIRE WEATHER
CONDITIONS.
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).
***************************************************************
MONDAY
SKY/WEATHER.........SUNNY. HAZE AND AREAS OF SMOKE.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 98 IN THE VALLEYS AND 86 IN THE RIDGETOPS.
MIN HUMIDITY........10 TO 14 PERCENT.
WIND (20 FT)........NORTH WINDS 4 TO 6 MPH SHIFTING TO THE SOUTH IN
THE AFTERNOON AND INCREASING TO 5 TO 8 MPH
WITH GUSTS TO 13 MPH.
MIXING HEIGHT.......5000 FT AGL INCREASING TO 8500 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 7 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
VENTILATION INDEX...MODERATE (242) INCREASING TO HIGH (505) IN THE
AFTERNOON.
MONDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY. AREAS OF SMOKE IN THE EVENING.
HAZE THROUGH THE NIGHT.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MIN TEMPERATURE.....AROUND 59.
MAX HUMIDITY........44 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 8 MPH.
MIXING HEIGHT.......8500 FT AGL FALLING TO 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 9 MPH SHIFTING TO THE WEST
AROUND 6 MPH OVERNIGHT.
VENTILATION INDEX...HIGH (677) DECREASING TO LOW (36) OVERNIGHT.
TUESDAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
CHANCE OF LIGHTNING.0 PERCENT.
MAX TEMPERATURE.....AROUND 100 IN THE VALLEYS AND AROUND 88 IN
THE RIDGETOPS.
MIN HUMIDITY........9 TO 12 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 2 TO 5 MPH IN THE MORNING
BECOMING SOUTH 10 TO 17 MPH WITH
GUSTS TO AROUND 25 MPH IN THE AFTERNOON.
MIXING HEIGHT.......5500 FT AGL INCREASING TO 9000 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 8 TO 16 MPH.
VENTILATION INDEX...HIGH (562) INCREASING TO VERY HIGH (1506) IN
THE AFTERNOON.
FORECASTER...MSC
REQUESTED BY...BILL BOX
TYPE OF REQUEST...WILDFIRE
.TAG 2616779.1/OTX
.DELDT 07/05/26
.FORMATTERVERSION 2.0.0
.EMAIL BILL_BOX@FIRENET.GOV
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