488
FNUS75 KSLC 211346
FWSSLC
SPOT FORECAST FOR WIDEMOUTH 2...RIFC
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
746 AM MDT FRI AUG 21 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON AUGUST 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
MONSOON MOISTURE IN PLACE ACROSS THE AREA TODAY WILL
RESULT IN ELEVATED DAYTIME RH, AND FUEL NUMEROUS SHOWERS AND
THUNDERSTORMS THIS AFTERNOON AND EVENING. A FEW SHOWERS WILL MOVE
THROUGH THE FIRE AREA THIS MORNING, WITH DAYTIME HEATING ALLOWING
THE ATMOSPHERE TO BECOME UNSTABLE BY EARLY AFTERNOON RESULTING IN
THE DEVELOPMENT OF ADDITIONAL SHOWERS AND THUNDERSTORMS. GUSTY
OUTFLOW WINDS IN EXCESS OF 40 MPH AND LOCALLY HEAVY RAINFALL RATES
IN EXCESS OF .25" WILL BE POSSIBLE WITH THESE STORMS. ALTHOUGH
RH RECOVERY WAS FAIRLY MARGINAL THIS MORNING, IN THE 30-40 PERCENT
RANGE, THIS INCREASE IN MOISTURE AND CLOUD COVER WILL KEEP VALUES
ELEVATED ABOVE 20 PERCENT THROUGHOUT THE DAY. WINDS WILL REMAIN
TERRAIN DRIVEN THROUGH MIDDAY BEFORE SOUTHWESTERLY WINDS BEGIN
TO MIX DOWN, HOWEVER WINDS WILL LIKELY BECOME DRIVEN PRIMARILY
BY OUTFLOWS MID TO LATE AFTERNOON. DRIER AIR SATURDAY WILL RESULT
IN A REDUCED CHANCE FOR SHOWERS AND THUNDERSTORMS.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-85 PERCENT CLOUD COVER).
SCATTERED SHOWERS THROUGH 1200, THEN NUMEROUS
SHOWERS AND SCATTERED THUNDERSTORMS IN THE
AFTERNOON.
CWR.................55 PERCENT.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF LIGHTNING.40 PERCENT.
MAX TEMPERATURE.....93-96.
MIN HUMIDITY........25-29 PERCENT.
WIND (20 FT)........DOWNSLOPE/DOWN-DRAINAGE 3-7 MPH BECOMING
SOUTHWEST 5 TO 9 MPH WITH GUSTS 14-20 MPH AFTER
1200. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS IN THE AFTERNOON.
MIXING HEIGHT.......9500 FT AGL (70-80TH PERCENTILE).
TRANSPORT WINDS.....SOUTH 15 MPH.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT CLOUD COVER) THEN
BECOMING PARTLY CLOUDY (35-45 PERCENT CLOUD
COVER). SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING, THEN ISOLATED
SHOWERS OVERNIGHT.
CWR.................20 PERCENT.
CHANCE OF PCPN......30 PERCENT.
CHANCE OF LIGHTNING.23 PERCENT.
MIN TEMPERATURE.....65-68.
MAX HUMIDITY........65-70 PERCENT.
WIND (20 FT)........DOWNSLOPE/DOWN-DRAINAGE 3-8 MPH. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
THE EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER) THEN
BECOMING PARTLY CLOUDY (30-40 PERCENT CLOUD
COVER). ISOLATED SHOWERS AND THUNDERSTORMS IN
THE AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF LIGHTNING.20 PERCENT.
MAX TEMPERATURE.....93-96.
MIN HUMIDITY........29-32 PERCENT.
WIND (20 FT)........SOUTH WINDS 2 TO 7 MPH BECOMING SOUTHWEST 6 TO
8 MPH WITH GUSTS TO AROUND 16 MPH IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE AFTERNOON.
MIXING HEIGHT.......11500 FT AGL (80-90TH PERCENTILE).
TRANSPORT WINDS.....SOUTH 10 TO 14 MPH.
FORECASTER...SEAMAN
REQUESTED BY...RACE NIELSON IC (T)
TYPE OF REQUEST...WILDFIRE
.TAG 2620108.0/SLC
.DELDT 08/21/26
.FORMATTERVERSION 2.0.0
.EMAIL RHETT.BAILEY@USDA.GOV,UTRFC@FIRENET.GOV,RMNIELSON@BLM.GOV
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