985  
FNUS75 KSLC 231410  
FWSSLC  
 
SPOT FORECAST FOR UPPER SANTA CLARA PILES  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
810 AM MDT THU MAR 23 2017  
   
DISCUSSION
 
TODAY WILL CONTINUE TO SEE UNSETTLED CONDITIONS WITH  
RAIN SHOWERS TRANSITIONING TO SNOW SHOWERS THROUGHOUT THE DAY.  
PRECIPITATION IS ANTICIPATED TO END BY 7PM WITH HIGH PRESSURE  
BUILDING IN FOR FRIDAY. WINDS MAY BECOME GUSTY LATE TODAY INTO THE  
EVENING HOURS FROM THE NORTHWEST AS THE PRECIPITATION BAND BANKS  
UP AGAINST THE TERRAIN ACROSS SOUTHWEST UTAH, NEAR THE BURN SITE.  
THE FLOW ALOFT WILL BECOME CALMER, AND THUS CLEARING INDEX FOR  
FRIDAY WILL NOT BE FAVORABLE TO BURN WITH VALUES WELL BELOW 500.  
THE AIRMASS WILL SEE A VERY SHORT DRYING TREND FOR FRIDAY.  
SATURDAY WILL SEE A RETURN TO DEEP MIXING ALOFT WITH CLEARING  
INDEX VALUES BACK WELL ABOVE 500 AND SOUTHWESTERLY WINDS ALOFT.  
CHANCES FOR PRECIPITATION RETURN LATE SATURDAY, AND CHANCES FOR A  
RAIN/SNOW MIX WILL RETURN.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT CLOUD COVER).  
OCCASIONAL SNOW EARLY IN THE MORNING, THEN  
OCCASIONAL SNOW SHOWERS AND A SLIGHT CHANCE OF  
THUNDERSTORMS IN THE AFTERNOON.  
CHANCE OF PCPN......70 PERCENT.  
CWR.................60 PERCENT.  
LAL.................1 UNTIL 1200, THEN 2.  
MAX TEMPERATURE.....42-44.  
MIN HUMIDITY........53-55%.  
WIND (20 FT)........SOUTHWEST WINDS 6-9 MPH BECOMING NORTHWEST 9-11  
MPH LATE IN THE AFTERNOON.  
CLEARING INDEX......1000+.  
HAINES INDEX........3 ..VERY LOW.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT CLOUD COVER) THEN  
BECOMING MOSTLY CLEAR (10-20 PERCENT CLOUD  
COVER).  
CHANCE OF PCPN......10 PERCENT.  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....32-34.  
MAX HUMIDITY........75-77%.  
WIND (20 FT)........NORTH WINDS 9-11 MPH BECOMING NORTHEAST 6-8 MPH  
LATE IN THE EVENING, THEN BECOMING SOUTHEAST  
AFTER MIDNIGHT BECOMING NORTHEAST 5-7 MPH EARLY  
IN THE MORNING.  
HAINES INDEX........3 ..VERY LOW.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT CLOUD COVER).  
CHANCE OF PCPN......0 PERCENT.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....52-54.  
MIN HUMIDITY........27-29%.  
WIND (20 FT)........NORTH WINDS 2-7 MPH BECOMING SOUTH 6-10 MPH IN  
THE AFTERNOON.  
CLEARING INDEX......250.  
HAINES INDEX........3 ..VERY LOW.  
 

 
FORECASTER...DEWEY  
REQUESTED BY...MICAH SUWYN  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1705043.0/SLC  
 
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