672  
FNUS75 KRIW 122055  
FWSRIW  
 
SPOT FORECAST FOR MIDDLE SWEENEY LOST PARTY...SCEMA  
NATIONAL WEATHER SERVICE RIVERTON WY  
255 PM MDT SUN JUL 12 2020  
 
FORECAST IS BASED ON FORECAST START TIME OF 1500 MDT ON JULY 12.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
GUSTY WINDS WILL CONTINUE THROUGH THE REST OF THE AFTERNOON, WITH  
PARTLY CLOUDY SKIES. WINDS WILL SUBSIDE THIS EVENING, BECOMING  
LIGHT AFTER SUNSET. A COLD FRONT WILL MOVE THROUGH THE AREA  
TONIGHT, BUT TEMPERATURES WILL NOT BE MUCH COLDER THAN LAST NIGHT.  
HIGHS MONDAY WILL BE ABOUT 10 DEGREES COOLER. GUSTY WINDS WILL  
RETURN MONDAY, INCREASING BY THE NOON HOUR, WITH SIMILAR SPEEDS AS  
THIS AFTERNOON.  
   
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
 
   
..HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT
 
 
FORECASTER...LAVOIE  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT).  
MAX TEMPERATURE.....72-75.  
MIN HUMIDITY........14-17 PERCENT.  
20-FOOT WINDS.......WEST WINDS 18 TO 23 MPH WITH GUSTS TO AROUND 32  
MPH.  
RIDGE TOP WINDS.....WEST AROUND 30 MPH.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
 
TIME (MDT) 3PM 4PM 5PM  
SKY (%).........5 2 0  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0  
LAL.............1 1 1  
TEMP............72 70 69  
RH..............21 22 23  
20 FT WIND DIR..W W W  
20 FT WIND SPD..18 20 21  
20 FT WIND GUST.35 38 40  
   
TONIGHT
 
 
SKY/WEATHER.........CLEAR (5-15 PERCENT).  
MIN TEMPERATURE.....42-45.  
MAX HUMIDITY........45-48 PERCENT.  
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH WITH GUSTS TO AROUND 30  
MPH DECREASING TO 8 TO 10 MPH WITH GUSTS TO  
AROUND 14 MPH BY 9PM, THEN BECOMING WEST AROUND  
8 MPH WITH GUSTS TO 11 MPH AFTER 11PM.  
RIDGE TOP WINDS.....WEST AROUND 25 MPH DECREASING TO AROUND 15 MPH  
BY 9PM.  
LAL.................1.  
CHC OF WETTING RAIN.ZERO PERCENT.  
 
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........0 0 0 0 0 0 0 0 0 1 9 19  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
TEMP............67 64 58 54 52 49 47 48 49 49 49 48  
RH..............26 29 34 37 36 37 41 39 37 37 38 40  
20 FT WIND DIR..W W W W W W W W W W W W  
20 FT WIND SPD..20 17 14 10 9 8 7 7 8 8 8 8  
20 FT WIND GUST.38 31 24 17 16 15 13 12 14 14 14 14  
   
FORECAST DAYS 3 THROUGH 5
 
   
MONDAY NIGHT
 
 
MOSTLY CLEAR. LOWS IN THE UPPER 30S. WINDS GENERALLY LESS THAN  
10 MPH.    
TUESDAY
 
 
CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 60S. WINDS  
GENERALLY LESS THAN 10 MPH.    
WEDNESDAY
 
 
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. WINDS  
GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. WINDS  
GENERALLY LESS THAN 10 MPH.  
 

 
FORECASTER...LAVOIE  
REQUESTED BY...J MITCHELL  
TYPE OF REQUEST...SAR  
.TAG 2009269.0/RIW  
.DELDT 07/12/20  
.EMAIL JMITCHELL@SUBSO.COM  
 
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