070  
FNUS75 KSLC 102335  
FWSSLC  
 
SPOT FORECAST FOR GAP FIRE...USFS  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
535 PM MDT THU JUL 10 2025  
 
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON JULY 11.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
HIGH PRESSURE WILL BRING DRY CONDITIONS WITH AFTERNOON  
RELATIVE HUMIDITY INTO THE SINGLE DIGITS. THERE WILL BE LIMITED  
OVERNIGHT INCREASE. WINDS WILL BE FROM THE NORTHWEST MUCH OF THE  
DAY FRIDAY AND SATURDAY, WITH AFTERNOON GUSTS AROUND 20 MPH. WINDS  
WILL DIMINISH EACH NIGHT AND TRANSITION TO A LIGHT SOUTHEAST  
WIND.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT CLOUD COVER).  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....91-93.  
MIN HUMIDITY........8-11 PERCENT.  
WIND (20 FT)........WEST WINDS 4-6 MPH BECOMING NORTHWEST 6-11 MPH  
IN THE LATE MORNING AND EARLY AFTERNOON, WITH  
GUSTS TO AROUND 18 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......12600 FT AGL.  
CLIMATOLOGY......80-90TH PERCENTILE.  
TRANSPORT WINDS.....NORTHWEST 9 TO 17 MPH.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........CLEAR (0-10 PERCENT CLOUD COVER).  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MIN TEMPERATURE.....58-60.  
MAX HUMIDITY........26-30 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 5-10 MPH WITH GUSTS TO AROUND  
18 MPH BECOMING NORTHEAST 3-6 MPH OVERNIGHT,  
THEN BECOMING SOUTHEAST 4-7 MPH AFTER 3 AM.  
MIXING HEIGHT.......11100 FT AGL DECREASING TO 1100 FT AGL  
OVERNIGHT.  
TRANSPORT WINDS.....NORTHWEST AROUND 17 MPH BECOMING NORTH AROUND 8  
MPH OVERNIGHT.  
   
SATURDAY
 
 
SKY/WEATHER.........SUNNY (0-5 PERCENT CLOUD COVER).  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....94-96.  
MIN HUMIDITY........6-9 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 3-6 MPH BECOMING NORTHWEST 6-11  
MPH WITH GUSTS TO AROUND 18 MPH IN THE  
AFTERNOON.  
MIXING HEIGHT.......2300 FT AGL INCREASING TO 13500 FT AGL IN THE  
AFTERNOON.  
CLIMATOLOGY......90-95TH PERCENTILE.  
TRANSPORT WINDS.....NORTHEAST AROUND 7 MPH BECOMING NORTHWEST  
AROUND 16 MPH IN THE AFTERNOON.  
 

 
FORECASTER...WILSON  
REQUESTED BY...SIERRA SAMPSON  
TYPE OF REQUEST...WILDFIRE  
.TAG 2517788.0/SLC  
.DELDT 07/10/25  
.FORMATTERVERSION 2.0.0  
.EMAIL SIERRA.SAMPSON@USDA.GOV  
 
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