895  
FNUS75 KSLC 162002  
FWSSLC  
 
SPOT FORECAST FOR WIDEMOUTH 2...FOREST SERVICE  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
202 PM MDT WED SEP 16 2026  
 
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON SEPTEMBER 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
..FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY EVENING
 
 
   
DISCUSSION
 
A LATE SEASON SURGE OF MONSOON MOISTURE WILL REMAIN  
ACROSS THE FIRE AREA THROUGH THURSDAY RESULTING IN SEVERAL ROUNDS  
OF SHOWERS AND THUNDERSTORMS. LOCALLY HEAVY RAINFALL IS POSSIBLE  
WITH ANY STORMS WHICH PASS OVER THE FIRE, WHICH MAY RESULT IN FLASH  
FLOODING AND DEBRIS FLOWS. GUSTY OUTFLOW WINDS TO 40 MPH WILL BE  
POSSIBLE WITH ANY THUNDERSTORMS PASSING NEAR THE AREA. WITH THIS  
MOISTURE IN PLACE, DAYTIME RH WILL REMAIN ELEVATED ABOVE 40 PERCENT  
WITH GOOD TO EXCELLENT OVERNIGHT RECOVERY. AWAY FROM ANY OUTFLOWS,  
WINDS WILL REMAIN TERRAIN DRIVEN THROUGH MIDDAY THURSDAY BEFORE  
GUSTY SOUTHWEST WINDS SURFACE BY EARLY AFTERNOON. THIS MOISTURE  
WILL REMAIN IN PLACE THROUGH FRIDAY MAINTAINING A CHANCE FOR  
SHOWERS AND THUNDERSTORMS.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER). A  
CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS  
LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON.  
CWR.................50 PERCENT.  
CHANCE OF PCPN......60 PERCENT.  
CHANCE OF LIGHTNING.33 PERCENT.  
MAX TEMPERATURE.....80-85.  
MIN HUMIDITY........45-55 PERCENT.  
WIND (20 FT)........SOUTH 3-7 MPH BECOMING SOUTHWEST 5-9 MPH WITH  
GUSTS TO 20 MPH IN THE AFTERNOON. GUSTY OUTFLOW  
WINDS TO 40 MPH NEAR THUNDERSTORMS.  
MIXING HEIGHT.......5400 FT AGL (40-50TH PERCENTILE).  
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT CLOUD COVER). A  
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS,  
MAINLY DURING THE EVENING.  
CWR.................15 PERCENT.  
CHANCE OF PCPN......20 PERCENT.  
CHANCE OF LIGHTNING.10 PERCENT.  
MIN TEMPERATURE.....AROUND 60.  
MAX HUMIDITY........80-90 PERCENT.  
WIND (20 FT)........SOUTH 3-7 MPH. GUSTY OUTFLOW WINDS TO 30 MPH  
NEAR THUNDERSTORMS IN THE EVENING.  
MIXING HEIGHT.......FALLING TO AROUND 500 FT AGL BY LATE EVENING.  
TRANSPORT WINDS.....SOUTH 10 MPH.  
   
FRIDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT CLOUD COVER) THEN  
BECOMING MOSTLY CLOUDY (70-80 PERCENT CLOUD  
COVER). A SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE MORNING, THEN RAIN SHOWERS  
LIKELY WITH A CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON.  
CWR.................40 PERCENT.  
CHANCE OF PCPN......70 PERCENT.  
CHANCE OF LIGHTNING.33 PERCENT.  
MAX TEMPERATURE.....78-85.  
MIN HUMIDITY........45-55 PERCENT.  
WIND (20 FT)........SOUTH 3-7 MPH BECOMING SOUTHWEST 4-9 MPH WITH  
GUSTS TO 20 MPH DURING THE AFTERNOON. GUSTY  
OUTFLOW WINDS TO 40 MPH NEAR THUNDERSTORMS.  
MIXING HEIGHT.......7500 FT AGL (50-60TH PERCENTILE).  
TRANSPORT WINDS.....SOUTHWEST 15 MPH.  
 

 
FORECASTER...SEAMAN  
REQUESTED BY...SIERRA SAMPSON  
TYPE OF REQUEST...WILDFIRE  
.TAG 2622016.0/SLC  
.DELDT 09/16/26  
.FORMATTERVERSION 2.0.0  
.EMAIL SIERRA.SAMPSON@USDA.GOV  
 
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