327  
FNUS75 KCYS 170008  
FWSCYS  
 
SPOT FORECAST FOR SLICKER...USFS  
NATIONAL WEATHER SERVICE CHEYENNE WY  
508 PM MST THU NOV 16 2017  
 
FORECAST IS BASED ON REQUEST TIME OF 1800 MST ON NOVEMBER 16.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (307) 772-2227, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
A STRONG COLD FRONT WILL MOVE THROUGH THE WESTERN NEBRASKA  
PANHANDLE FRIDAY AFTERNOON, BRINGING CHANCES FOR RAIN AND SNOW SHOWERS  
THROUGH FRIDAY EVENING. MUCH COOLER TEMPERATURES AND GUSTY NORTHWEST  
WINDS WILL FOLLOW IN THE WAKE OF THE FRONTAL PASSAGE FRIDAY NIGHT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY.  
CWR.................0 PERCENT.  
LAL.................1.  
TEMPERATURE.........58 AT REQUEST...MIN 39.  
RH..................30 PERCENT AT REQUEST...MAX 67 PERCENT.  
WIND (20 FT)........WINDS SOUTHWEST 6 TO 8 MPH...BECOMING NORTHWEST  
6 TO 12 MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......500-1300 FT AGL.  
TRANSPORT WINDS.....WEST 15 TO 25 MPH SHIFTING TO THE NORTH 8 TO 15  
MPH AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR /6100 DECREASING TO 3700 KNOT-FT/.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH AT REQUEST.  
   
FRIDAY
 
 
SKY/WEATHER.........CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS LATE IN  
THE MORNING. CHANCE OF RAIN SHOWERS LATE IN THE  
AFTERNOON.  
CWR.................4 PERCENT INCREASING TO 25 PERCENT LATE IN THE  
AFTERNOON.  
LAL.................1.  
TEMPERATURE.........MAX 55.  
RH..................MIN 38 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS AROUND 6 MPH INCREASING TO 8 TO  
10 MPH AND GUSTY.  
MIXING HEIGHT.......1300 FT AGL INCREASING TO 7100 FT AGL LATE IN  
THE MORNING, THEN DECREASING TO 2800 FT AGL  
LATE IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHEAST AROUND 7 MPH SHIFTING TO THE  
SOUTHWEST 8 TO 14 MPH IN THE MORNING, BECOMING  
WEST 20 TO 25 MPH EARLY IN THE AFTERNOON,  
INCREASING TO 30 TO 35 MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (3700 KNOT-FT) IMPROVING TO EXCELLENT  
(126300 KNOT-FT) LATE IN THE MORNING.  
HAINES INDEX........2 TO 4 OR OR VERY TO LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY THEN  
BECOMING CLEAR. CHANCE OF RAIN AND SHOWERS IN THE  
EVENING.  
CWR.................25 PERCENT DECREASING TO 2 PERCENT LATE IN THE  
EVENING.  
LAL.................1 UNTIL 0500.  
TEMPERATURE.........MIN 28.  
RH..................MAX 72 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 13 TO 17 MPH. GUSTS UP TO 25  
MPH INCREASING TO 30 MPH IN THE LATE EVENING  
AND OVERNIGHT.  
MIXING HEIGHT.......2800 DECREASING TO 2200 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 26 TO 33 MPH INCREASING TO AROUND 36  
MPH EARLY IN THE MORNING.  
SMOKE DISPERSAL.....GOOD TO EXCELLENT (54600-66600 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 

 
FORECASTER...JAMSKI  
REQUESTED BY...MATT KARGES  
TYPE OF REQUEST...WILDFIRE  
.TAG 1718941.0/CYS  
.EMAIL MKARGES@FS.FED.US  
 
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