535  
FNUS75 KSLC 211041  
FWSSLC  
 
SPOT FORECAST FOR STEVE'S BASIN  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
341 AM MST TUE NOV 21 2017  
   
DISCUSSION
 
WITH MORE STABLE CONDITIONS DEVELOPING OVERHEAD DUE  
TO BUILDING HIGH PRESSURE, MIXING HEIGHTS WILL BE LOW AND FURTHER  
LIMITING CLEARING INDEX VALUES TO BELOW 500 TODAY. CLOUDY SKIES  
WILL BEGIN TO CLEAR THIS AFTERNOON, WITH MOSTLY LIGHT WINDS LESS  
THAN 10 MPH. CLEARING WILL BE MUCH OF THE SAME, IF NOT TRENDING  
LOWER WEDNESDAY AND THURSDAY WITH CONTINUED STABLE CONDITIONS  
UNDER HIGH PRESSURE. THE NEXT CHANCE FOR ANY SUBSTANTIAL MIXING  
WILL BE FRIDAY WHEN A FRONT MOVES INTO PART OF NORTHERN UTAH  
INCREASING MIXING.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT CLOUD COVER) THEN  
BECOMING PARTLY CLOUDY (40-50 PERCENT CLOUD  
COVER).  
CHANCE OF PCPN......10 PERCENT.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....54-56.  
MIN HUMIDITY........38-40%.  
WIND (20 FT)........SOUTH WINDS 5-8 MPH BECOMING WEST 3-8 MPH EARLY  
IN THE AFTERNOON.  
CLEARING INDEX......440.  
HAINES INDEX........2 ..VERY LOW.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (45-55 PERCENT CLOUD COVER) THEN  
BECOMING PARTLY CLOUDY (45-55 PERCENT CLOUD  
COVER).  
CHANCE OF PCPN......0 PERCENT.  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....34-36.  
MAX HUMIDITY........73-75%.  
WIND (20 FT)........WEST WINDS 2-5 MPH BECOMING SOUTH LATE IN THE  
EVENING.  
HAINES INDEX........2 ..VERY LOW.  
   
WEDNESDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT CLOUD COVER).  
CHANCE OF PCPN......0 PERCENT.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....AROUND 60.  
MIN HUMIDITY........33-35%.  
WIND (20 FT)........SOUTH WINDS 3-5 MPH BECOMING NORTHWEST 4-6 MPH  
LATE IN THE MORNING, THEN BECOMING NORTH 3-5  
MPH LATE IN THE AFTERNOON.  
CLEARING INDEX......400.  
HAINES INDEX........4 ..LOW.  
 

 
FORECASTER...DEWEY  
REQUESTED BY...KELLY CORNWALL  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1719010.1/SLC  
 
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