880  
FNUS75 KSLC 271307  
FWSSLC  
 
SPOT FORECAST FOR HWY 150...USFS  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
707 AM MDT SUN SEP 27 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON SEPTEMBER 27.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
SOUTHERLY WINDS WILL STAY GUSTY THIS AFTERNOON AND  
AHEAD OF AN APPROACHING PACIFIC STORM SYSTEM. MOISTURE WILL ALSO  
INCREASE SOMEWHAT, ALLOWING FOR WIDELY SCATTERED SHOWERS AND  
THUNDERSTORMS IN THE VICINITY OF THE BURN THIS AFTERNOON. MOISTURE  
WILL INCREASE FURTHER TOMORROW WITH DECREASING WINDS AS THE TROUGH  
MOVES ACROSS UTAH. THIS WILL BRING WIDESPREAD SHOWERS AND A FEW  
THUNDERSTORMS WITH A HIGH LIKELIHOOD OF WETTING RAIN. DRIER  
CONDITIONS WILL DEVELOP FOR THE MIDDLE TO LATTER PART OF THE WEEK  
WITH A GRADUAL WARMING TREND.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT CLOUD COVER) THEN  
BECOMING MOSTLY CLOUDY (75-85 PERCENT CLOUD  
COVER). CHANCE OF RAIN SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
CWR.................10 PERCENT.  
CHANCE OF PCPN......40 PERCENT.  
CHANCE OF LIGHTNING.15 PERCENT.  
MAX TEMPERATURE.....58-62.  
MIN HUMIDITY........50-54 PERCENT.  
WIND (20 FT)........SOUTH WINDS 8-12 MPH. GUSTY OUTFLOW WINDS  
NEAR THUNDERSTORMS IN THE AFTERNOON.  
MIXING HEIGHT.......6800 FT AGL (50-60TH PERCENTILE).  
TRANSPORT WINDS.....SOUTH WINDS 18-22 MPH.  
CLEARING INDEX......1000+.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (65-75 PERCENT CLOUD COVER) THEN  
BECOMING MOSTLY CLOUDY (65-75 PERCENT CLOUD  
COVER). SLIGHT CHANCE OF THUNDERSTORMS EARLY IN  
THE EVENING. CHANCE OF RAIN SHOWERS THROUGH THE  
NIGHT.  
CWR.................25 PERCENT.  
CHANCE OF PCPN......50 PERCENT.  
CHANCE OF LIGHTNING.10 PERCENT.  
MIN TEMPERATURE.....38-42.  
MAX HUMIDITY........96-100 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5-10 MPH. GUSTY OUTFLOW WINDS NEAR  
THUNDERSTORMS EARLY IN THE EVENING.  
MIXING HEIGHT.......600 FT AGL.  
TRANSPORT WINDS.....SOUTH WINDS 10-15 MPH.  
   
MONDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT CLOUD COVER).  
SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING.  
RAIN SHOWERS THROUGH THE DAY. CHANCE OF  
THUNDERSTORMS IN THE AFTERNOON.  
CWR.................70 PERCENT.  
CHANCE OF PCPN......90 PERCENT.  
CHANCE OF LIGHTNING.30 PERCENT.  
MAX TEMPERATURE.....48-52.  
MIN HUMIDITY........92-96 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5-10 MPH. GUSTY OUTFLOW WINDS  
NEAR THUNDERSTORMS.  
MIXING HEIGHT.......5800 FT AGL (40-50TH PERCENTILE).  
TRANSPORT WINDS.....SOUTHWEST WINDS 8-12 MPH.  
CLEARING INDEX......820.  
 

 
FORECASTER...TRAPHAGAN  
REQUESTED BY...BROCK TAMOWSKI  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2622594.0/SLC  
.DELDT 09/27/26  
.FORMATTERVERSION 2.0.0  
.EMAIL DAVID.TAMOWSKI@USDA.GOV  
 
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