195
FNUS75 KCYS 261213
FWSCYS
SPOT FORECAST FOR FE WARREN PILE...WFS
NATIONAL WEATHER SERVICE CHEYENNE WY
613 AM MDT SUN APR 26 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
OVERCAST SKIES AND FOGGY CONDITIONS ARE ONGOING THIS MORNING AHEAD OF
MORE SEASONABLE WEATHER FOR THIS AFTERNOON. HIGH TEMPERATURES WILL BE
IN THE LOW-50S THIS AFTERNOON WITH MINIMUM HUMIDITY VALUES ONLY DROPPING
TO AROUND 55 TO 60 PERCENT. SOUTHERLY FLOW INCREASES TO 10 TO 15MPH THIS
MORNING WITH GUSTS BETWEEN 20 AND 25MPH. ISOLATED TO SCATTERED RAIN
SHOWERS ARE POSSIBLE THIS AFTERNOON. A RUMBLE OR TWO OF THUNDER CANNOT BE
RULED OUT THIS AFTERNOON, BUT IS EXPECTED TO BE SHORT-LIVED. RAIN SHOWERS
WILL BEGIN TO TRANSITION BACK TO RAIN/SNOW FOR THE OVERNIGHT HOURS.
OVERNIGHT HUMIDITY RECOVERIES WILL BE OVER 95 PERCENT, WITH FOG POSSIBLE
AGAIN IN THE EARLY MORNING HOURS MONDAY. NORTHERLY FLOW WILL DEVELOP OVERNIGHT
TONIGHT WITH WINDS BETWEEN 10 AND 15MPH. WINDS WILL BE STRONGER ON MONDAY, LIKELY
BETWEEN 15 AND 20MPH SUSTAINED, GUSTING UP TO 30 TO 35MPH IN EARLY AFTERNOON
HOURS. OTHERWISE, MONDAY WILL BE SIMILAR TO TODAY, THOUGH SLIGHTLY DRIER, WITH
HIGHS IN THE LOW-50S, AFTERNOON MINIMUM HUMIDITY IN THE 40 TO 45 PERCENT RANGE,
AND OVERNIGHT RECOVERIES WELL INTO THE 90S.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). CHANCE OF RAIN
AND SNOW IN THE MORNING, THEN RAIN AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
CWR.................7 PERCENT INCREASING TO 52 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 51.
MIN HUMIDITY........58 PERCENT.
WIND (20 FT)........SOUTH WINDS 7 TO 12 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE
AFTERNOON.
MIXING HEIGHT.......4200 FT AGL.
TRANSPORT WINDS.....SOUTH 14 TO 21 MPH.
SMOKE DISPERSAL.....POOR (16200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (70900 KNOT-FT) IN THE
AFTERNOON.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........92 93 92 85 83 75 77 83 86 87 78
WEATHER COV.....CHC CHC SCH SCH SCH CHC CHC CHC LKY DEF
WEATHER TYPE....RS RS RS RN RN RN RN RN RN RN
TSTM COV........ SCH SCH SCH SCH SCH SCH
CWR.............10 10 10 10 10 50 50 50 50 50 50
TEMP............33 33 35 36 39 43 45 48 49 48 48
RH..............96 96 92 92 85 73 68 60 58 65 68
20 FT WIND DIR..S S S S S S S S S S S
20 FT WIND SPD..10 10 12 12 12 12 12 12 12 9 7
20 FT WIND GUST.18 20 21 21 21 22 22 22 21 18 14
MIX HGT (KFT)...1.2 1.6 1.5 1.7 2.0 2.2 3.0 3.8 3.6 4.2 2.9
TRANSP WIND DIR.S S S S S S S S S S SW
TRANSP WIND SPD.16 18 17 17 18 17 20 21 18 20 14
SDSPL KT-FT/100016 25 22 26 32 34 50 69 57 71 34
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT). RAIN LIKELY AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING,
THEN CHANCE OF RAIN OVERNIGHT.
CWR.................5 PERCENT.
MIN TEMPERATURE.....AROUND 34.
MAX HUMIDITY........92 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 6 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING WEST 5 TO 6 MPH
LATE IN THE EVENING SHIFTING TO THE NORTHWEST 6
TO 12 MPH. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE EVENING.
MIXING HEIGHT.......700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 8 MPH SHIFTING TO THE SOUTH 7
TO 10 MPH EARLY IN THE EVENING, THEN SHIFTING
TO THE WEST 10 TO 18 MPH IN THE LATE EVENING
AND OVERNIGHT SHIFTING TO THE NORTHWEST AROUND
20 MPH EARLY IN THE MORNING.
SMOKE DISPERSAL.....POOR (6100 KNOT-FT).
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........75 69 78 75 73 64 54 50 56 53 65 65
WEATHER COV.....LKY LKY CHC CHC SCH CHC CHC CHC CHC SCH CHC CHC
WEATHER TYPE....RN RN RN RN RN RN RN RN RN RN RN RN
TSTM COV........SCH SCH SCH
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
TEMP............46 44 42 40 38 38 39 38 37 37 36 36
RH..............73 79 82 85 92 92 85 85 85 85 89 85
20 FT WIND DIR..S S S S SW SW W W NW NW NW NW
20 FT WIND SPD..6 5 3 3 3 5 5 6 6 7 9 12
20 FT WIND GUST.10 9 8 7 7 8 9 10 12 13 16 21
MIX HGT (KFT)...1.6 1.2 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.8 0.9 1.0
TRANSP WIND DIR.SW SE S SW W W W W W W NW NW
TRANSP WIND SPD.8 7 10 10 13 10 13 15 17 16 18 20
SDSPL KT-FT/100011 7 6 6 8 7 7 9 10 11 15 18
MONDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF RAIN
SHOWERS AND SNOW SHOWERS IN THE MORNING, THEN
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
CWR.................5 PERCENT INCREASING TO 30 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 51.
MIN HUMIDITY........41 PERCENT.
WIND (20 FT)........NORTH WINDS 10 TO 15 MPH SHIFTING TO THE
NORTHEAST AROUND 8 MPH LATE IN THE AFTERNOON.
GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......6700 FT AGL.
TRANSPORT WINDS.....NORTHWEST 22 TO 29 MPH SHIFTING TO THE
NORTHEAST 14 TO 18 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (18400 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (111400 KNOT-FT) IN THE
AFTERNOON INCREASING TO GOOD (60200 KNOT-FT)
EARLY IN THE MORNING INCREASING TO VERY GOOD
(137000 KNOT-FT) IN THE AFTERNOON IN THE
AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........59 42 35 28 21 21 27 36 45 56 67 79
WEATHER COV.....CHC CHC CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY
WEATHER TYPE....RS RS RS RS RS RS RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH
CWR.............10 10 10 10 10 10 30 30 30 30 30 30
TEMP............36 35 37 40 44 47 49 50 50 51 49 48
RH..............79 82 72 64 53 47 44 42 42 41 46 49
20 FT WIND DIR..N N N N N N N N N N NE NE
20 FT WIND SPD..12 14 15 15 15 15 14 14 13 12 10 8
20 FT WIND GUST.22 24 26 28 28 26 25 24 23 21 18 15
MIX HGT (KFT)...1.0 1.7 2.3 3.0 3.8 4.5 5.1 5.9 6.5 6.7 6.1 5.0
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW N NE
TRANSP WIND SPD.22 26 28 29 28 26 25 24 24 22 18 14
SDSPL KT-FT/100018 39 55 76 91 103 111 123 137 128 98 60
FORECASTER...MOSE
REQUESTED BY...MERMIGKAS
TYPE OF REQUEST...PRESCRIBED
.TAG 2611648.2/CYS
.DELDT 04/26/26
.FORMATTERVERSION 2.0.0
.EMAIL ALEXANDROS_MERMIGKAS@FWS.GOV
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