090  
FNUS75 KCYS 222028  
FWSCYS  
 
SPOT FORECAST FOR RFA COMPLEX RX...CAMP GUERNSEY FIRE DEPARTMENT  
NATIONAL WEATHER SERVICE CHEYENNE WY  
228 PM MDT THU MAY 22 2025  
 
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE AT (307) 772-2227  
   
DISCUSSION  
 
OVERCAST SKIES THIS WEEKEND AS A WEATHER SYSTEM MOVES THROUGH THE REGION.  
THIS SYSTEM WILL BRING BENEFICIAL RAINFALL TO MUCH OF THE AREA. BREEZY  
EASTERLY TO SOUTHEASTERLY WINDS EXPECTED SATURDAY GUSTING TO AROUND 15  
TO 20 MPH, DECREASING TO AROUND 10 MPH OVERNIGHT. OVERNIGHT HUMIDITY IS  
EXPECTED TO RECOVER TO AROUND 95 TO 100 PERCENT, WITH A DAYTIME MINIMUM  
HUMIDITY OF 60 TO 65 PERCENT ON SATURDAY. BEST PRECIPITATION CHANCES ARE  
EXPECTED BETWEEN NOON AND 6PM SATURDAY, BUT PRECIPITATION CHANCES REMAIN  
ALL DAY AND NIGHT SATURDAY.  
   
SATURDAY  
 
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). RAIN SHOWERS  
LIKELY LATE IN THE MORNING, THEN RAIN SHOWERS  
AND SLIGHT CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON.  
CWR.................24 PERCENT INCREASING TO 73 PERCENT IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 61.  
MIN HUMIDITY........65 PERCENT.  
WIND (20 FT)........EAST WINDS 8 TO 9 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.  
MIXING HEIGHT.......1700 FT AGL.  
TRANSPORT WINDS.....EAST 17 TO 23 MPH.  
SMOKE DISPERSAL.....POOR (21000 KNOT-FT).  
 
TIME (MDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........88 88 87 85 83 82 81 81  
WEATHER COV.....LKY LKY DEF DEF DEF DEF DEF DEF  
WEATHER TYPE....RW RW RW RW RW RW RW RW  
TSTM COV........ SCH SCH SCH SCH SCH SCH  
CWR.............20 20 70 70 70 70 70 70  
TEMP............56 58 59 60 61 61 61 60  
RH..............83 75 72 69 65 65 65 67  
20 FT WIND DIR..E E E E E E E E  
20 FT WIND SPD..9 9 9 9 9 9 9 8  
20 FT WIND GUST.17 17 18 18 17 17 16 16  
MIX HGT (KFT)...1.4 1.5 1.6 1.7 1.7 1.7 1.7 1.6  
TRANSP WIND DIR.E E E E E E E E  
TRANSP WIND SPD.17 17 18 20 22 23 23 23  
SDSPL KT-FT/100021 23 26 29 33 35 34 33  
   
SATURDAY NIGHT  
 
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). RAIN SHOWERS AND  
CHANCE OF THUNDERSTORMS IN THE EVENING, THEN  
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF  
THUNDERSTORMS OVERNIGHT.  
CWR.................68 PERCENT DECREASING TO 43 PERCENT OVERNIGHT.  
MIN TEMPERATURE.....AROUND 48.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........EAST WINDS 7 TO 8 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
EVENING. GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS IN THE LATE EVENING AND  
OVERNIGHT.  
MIXING HEIGHT.......1000 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 13 TO 22 MPH DECREASING TO AROUND 12  
MPH EARLY IN THE MORNING.  
SMOKE DISPERSAL.....POOR (12400 KNOT-FT).  
 
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........82 85 88 90 89 87 85 85 85 86 86 86  
WEATHER COV.....DEF DEF DEF DEF DEF DEF LKY LKY LKY LKY LKY LKY  
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW  
TSTM COV........CHC CHC CHC SCH SCH SCH SCH SCH SCH SCH SCH SCH  
CWR.............70 70 70 70 70 70 40 40 40 40 40 40  
TEMP............59 57 55 54 53 52 52 51 51 50 49 49  
RH..............69 75 80 83 86 86 86 89 89 93 96 96  
20 FT WIND DIR..E E E E E E E E E E E E  
20 FT WIND SPD..8 8 8 8 7 7 7 7 7 7 7 7  
20 FT WIND GUST.16 15 15 15 15 14 14 14 13 13 12 12  
MIX HGT (KFT)...1.5 1.3 1.1 1.0 1.1 1.3 1.4 1.4 1.2 1.1 1.2 1.2  
TRANSP WIND DIR.E E E E SE SE SE SE SE SE SE SE  
TRANSP WIND SPD.22 20 18 16 15 14 14 14 13 13 13 12  
SDSPL KT-FT/100029 22 18 14 15 16 17 17 14 13 13 12  
 
 
FORECASTER...MOSE  
REQUESTED BY...NOLAN WOODRUFF  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2514538.0/CYS  
.DELDT 05/22/25  
.FORMATTERVERSION 2.0.0  
.EMAIL NOLAN.WOODRUFF@WYO.GOV  
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