430  
FNUS75 KCYS 191228  
FWSCYS  
 
SPOT FORECAST FOR F.E. WARREN...USFWS  
NATIONAL WEATHER SERVICE CHEYENNE WY  
528 AM MST WED NOV 19 2025  
 
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE AT (307) 772-2227  
   
DISCUSSION  
 
MOSTLY SUNNY TODAY WITH BREEZY CONDITIONS ARRIVING AROUND 9AM. WESTERLY  
WINDS WILL START GUSTING 15 TO 20 MPH FROM 9AM THROUGH ABOUT 4PM.  
AFTERNOON MINIMUM RELATIVE HUMIDITY VALUES WILL REMAIN IN THE 25 TO 30  
PERCENT RANGE AS SLIGHTLY DRIER CONDITIONS ARE EXPECTED TODAY. NO  
PRECIPITATION IS EXPECTED TODAY, BUT PRECIPITATION CHANCES RETURN  
THURSDAY EVENING.  
   
TODAY  
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).  
CWR.................2 PERCENT.  
MAX TEMPERATURE.....AROUND 57.  
MIN HUMIDITY........30 PERCENT.  
WIND (20 FT)........WEST WINDS 5 TO 14 MPH.  
MIXING HEIGHT.......6900 FT AGL.  
TRANSPORT WINDS.....WEST 13 TO 20 MPH DECREASING TO 9 TO 13 MPH  
LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (6300 KNOT-FT) EARLY IN THE MORNING,  
INCREASING TO GOOD (89500 KNOT-FT) IN THE  
LATE MORNING, INCREASING TO VERY GOOD  
(130600 KNOT-FT) IN THE AFTERNOON, THEN  
DECREASING TO POOR (6900 KNOT-FT) IN THE  
EVENING.  
 
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........54 39 24 17 32 32 37 44 50 52 50 61  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............30 34 38 46 50 53 54 55 56 55 54 50  
RH..............88 78 70 49 42 36 34 31 30 31 32 37  
20 FT WIND DIR..W W W W W W W W W W W W  
20 FT WIND SPD..8 9 10 12 13 14 13 12 10 8 7 5  
20 FT WIND GUST.15 16 17 21 23 24 23 21 17 14 10 8  
MIX HGT (KFT)...0.6 0.6 0.5 1.5 3.8 5.3 6.2 6.9 6.8 5.6 1.4 0.9  
TRANSP WIND DIR.W W W W W W W W W W W W  
TRANSP WIND SPD.13 14 15 20 24 24 24 22 21 18 13 9  
SDSPL KT-FT/10006 7 7 25 80 110 131 131 122 90 16 7  
   
TONIGHT  
 
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING  
PARTLY CLOUDY (35-45 PERCENT).  
CWR.................2 PERCENT.  
MIN TEMPERATURE.....AROUND 28.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING WEST AROUND 5 MPH.  
MIXING HEIGHT.......500 FT AGL.  
TRANSPORT WINDS.....WEST 6 TO 8 MPH SHIFTING TO THE NORTHEAST  
AROUND 7 MPH OVERNIGHT, THEN SHIFTING TO THE  
SOUTHEAST AFTER 3 AM SHIFTING TO THE SOUTH  
AROUND 8 MPH EARLY IN THE MORNING.  
SMOKE DISPERSAL.....POOR (2800 KNOT-FT).  
 
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........63 63 62 59 54 55 54 47 32 30 33 38  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............45 43 41 39 37 36 35 34 34 32 31 31  
RH..............47 51 55 62 70 72 75 78 78 85 88 92  
20 FT WIND DIR..W W W W SW S SW W W W W SW  
20 FT WIND SPD..3 3 3 3 3 3 3 3 3 5 5 5  
20 FT WIND GUST.7 7 7 7 7 7 7 7 7 7 8 8  
MIX HGT (KFT)...0.6 0.6 0.7 0.6 0.6 0.6 0.6 0.5 0.5 0.6 0.6 0.6  
TRANSP WIND DIR.W W NW NW W NW W W NE E SE S  
TRANSP WIND SPD.8 6 7 7 6 7 7 7 7 7 7 8  
SDSPL KT-FT/10004 3 4 4 3 3 3 3 3 3 3 4  
   
THURSDAY  
 
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF RAIN  
SHOWERS LATE IN THE AFTERNOON.  
CWR.................4 PERCENT INCREASING TO 11 PERCENT LATE IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 49.  
MIN HUMIDITY........51 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 7 MPH SHIFTING TO THE  
SOUTHEAST 7 TO 12 MPH IN THE LATE MORNING AND  
AFTERNOON.  
MIXING HEIGHT.......2900 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 9 TO 14 MPH.  
SMOKE DISPERSAL.....POOR (4200 KNOT-FT).  
 
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........53 34 44 31 34 47 55 55 56 60 66 73  
WEATHER COV..... CHC  
WEATHER TYPE.... RW  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0 0 0 0 10  
TEMP............29 31 36 41 44 47 47 48 48 47 45 44  
RH..............100 96 82 67 58 51 53 51 51 53 58 60  
20 FT WIND DIR..SW S S S S S SE SE SE SE SE SE  
20 FT WIND SPD..5 5 6 7 8 10 10 12 10 9 8 7  
20 FT WIND GUST.8 8 9 12 15 17 18 18 18 17 15 14  
MIX HGT (KFT)...0.6 0.5 0.5 1.0 1.7 2.3 2.7 2.9 2.8 2.3 1.7 1.1  
TRANSP WIND DIR.S SE S S S S S SE SE SE SE SE  
TRANSP WIND SPD.9 10 9 12 13 13 13 14 13 13 13 13  
SDSPL KT-FT/10004 5 4 10 18 25 30 35 31 26 18 12  
 
 
FORECASTER...MOSE  
REQUESTED BY...MICHAEL MILLER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2526046.4/CYS  
.DELDT 11/19/25  
.FORMATTERVERSION 2.0.0  
.EMAIL MICHAEL_A_MILLER@FWS.GOV  
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