441
FNUS75 KRIW 111210
FWSRIW
SPOT FORECAST FOR CLOVERMIST RX...FOREST SERVICE
NATIONAL WEATHER SERVICE RIVERTON WY
510 AM MST THU DEC 11 2025
FORECAST IS BASED ON IGNITION TIME OF 0700 MST ON DECEMBER 11.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
BREEZY CONDITIONS WILL PREVAIL TODAY WITH GUSTS TO 25 TO 30 MPH, WITH
SOME DECREASE AFTER 1200. A COLD FRONT DROPPING SOUTHWARD WILL BRING
A CHANCE OF SNOW STARTING AROUND 1200, BUT THE BEST CHANCE OF SNOW WILL
BE AFTER 1600 AND INTO TONIGHT. ACCUMULATIONS WILL BE GENERALLY BETWEEN
1 TO 3 INCHES THROUGH TONIGHT. MIXING AND SMOKE DISPERSAL SHOULD BECOME
FAIR AFTER 1000 AND THEN GOOD AFTER 1400 BEFORE BECOMING POOR AGAIN BY
SUNSET. SNOW SHOULD PERSIST INTO THE MORNING HOURS ON FRIDAY BEFORE
TAPERING OFF IN THE AFTERNOON.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
REST OF TODAY
SKY/WEATHER.........PARTLY SUNNY (40-50 PERCENT), THEN BECOMING
MOSTLY CLOUDY (70 TO 80 PERCENT). CHANCE OF SNOW
AFTER 1300, THEN SNOW LIKELY AFTER 1700.
CWR.................0 PERCENT INCREASING TO 66 PERCENT.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 38.
MIN HUMIDITY........59 PERCENT.
WIND (20 FT)........WEST WINDS 12 TO 18 MPH WITH GUSTS TO AROUND 25
MPH.
RIDGETOP WIND.......WEST 25 TO 30 MPH.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WINDS.....WEST 29 TO 36 MPH UNTIL 1600, THEN 23 TO 25
MPH.
SMOKE DISPERSAL.....POOR UNTIL 1000, BECOMING GOOD AROUND 1400.
TIME (MST) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........40 40 50 55 65 70 75 80 80 80 80
WEATHER COV..... SCH CHC CHC CHC LKY LKY
WEATHER TYPE.... SN SN SN SN SN SN
TSTM COV........
CWR.............0 0 0 0 20 20 20 20 20 20 70
CHC OF PCPN (%).0 10 10 10 10 10 30 40 50 60 70
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............37 36 33 36 36 38 36 36 38 37 36
RH..............70 69 69 62 65 64 64 67 65 67 71
20 FT WIND DIR..W W W W W W W W W W W
20 FT WIND SPD..18 18 18 19 19 18 18 17 17 16 15
20 FT WIND GUST.28 28 29 29 30 29 28 26 25 24 22
RIDGE WIND DIR..W W W W W W W W W W W
RIDGE WIND SPD..30 30 30 30 30 30 30 25 25 25 25
MIX HGT (KFT)...0.5 1.0 1.5 2.0 2.0 2.0 1.5 2.0 2.0 1.5 1.5
TRANSP WIND DIR.W W W W W W W W W W W
TRANSP WIND SPD.32 32 32 36 33 33 31 35 29 25 23
SDSPL KT-FT/100019 22 36 57 57 57 47 64 45 34 31
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SNOW LIKELY.
CWR.................66 PERCENT DECREASING TO 38 PERCENT EARLY IN
THE MORNING.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
MIN TEMPERATURE.....AROUND 33.
MAX HUMIDITY........78 PERCENT.
WIND (20 FT)........WEST WINDS 11 TO 14 MPH WITH GUSTS TO AROUND 21
MPH.
RIDGETOP WIND.......WEST AROUND 20 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 22 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........80 80 80 75 80 80 75 75 75 75 70 65
WEATHER COV.....LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CWR.............70 70 70 70 70 60 60 60 60 60 60 40
CHC OF PCPN (%).70 70 70 70 70 60 60 60 70 70 70 70
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............36 36 36 34 36 36 36 36 34 34 34 34
RH..............72 73 74 76 73 76 74 75 77 76 75 77
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..14 14 13 12 12 11 11 11 11 11 11 11
20 FT WIND GUST.21 20 19 18 18 17 17 17 17 17 17 17
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..20 20 20 20 20 20 20 20 20 20 20 20
MIX HGT (KFT)...1.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.22 22 21 21 21 21 21 21 22 21 21 20
SDSPL KT-FT/100030 13 13 12 12 12 12 12 13 13 12 11
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SNOW LIKELY IN
THE MORNING, THEN CHANCE OF SNOW LATE IN THE
MORNING.
CWR.................38 PERCENT DECREASING TO 3 PERCENT LATE IN THE
MORNING.
CHANCE OF PCPN......70 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 38.
MIN HUMIDITY........68 PERCENT.
WIND (20 FT)........WEST WINDS 11 TO 17 MPH. GUSTS UP TO 30 MPH
INCREASING TO 31 MPH LATE IN THE AFTERNOON.
RIDGETOP WIND.......WEST 20 TO 25 MPH.
MIXING HEIGHT.......2500 FT AGL.
TRANSPORT WINDS.....WEST 22 TO 31 MPH UNTIL 1200, THEN 29 TO 35 MPH
UNTIL 1700, THEN AROUND 25 MPH.
SMOKE DISPERSAL.....POOR UNTIL 0800. FAIR EARLY IN THE MORNING
INCREASING TO GOOD IN THE AFTERNOON AFTER 1300.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........65 65 55 60 65 70 70 70 65 65 65 65
WEATHER COV.....LKY LKY LKY LKY LKY CHC CHC CHC CHC CHC CHC
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CWR.............40 40 40 40 40 0 0 0 0 0 0 0
CHC OF PCPN (%).70 70 70 70 70 30 30 30 30 30 30 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............34 35 33 33 34 36 37 38 38 37 36 35
RH..............76 75 78 78 76 73 71 70 69 68 68 68
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..11 11 11 12 13 14 15 16 16 16 16 17
20 FT WIND GUST.17 17 17 18 19 21 22 24 24 24 24 25
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..20 20 20 20 20 20 25 25 25 25 25 25
MIX HGT (KFT)...1.0 1.0 1.5 2.0 2.0 2.5 2.5 2.5 2.5 2.5 2.0 2.0
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.22 22 23 25 29 31 32 33 35 31 29 25
SDSPL KT-FT/100017 22 31 39 52 65 68 72 76 63 54 43
FORECAST DAYS 3 THROUGH 5
SATURDAY
PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN THE UPPER 20S.
HIGHS IN THE UPPER 30S. WEST WINDS AROUND 13 MPH.
SUNDAY
MOSTLY CLEAR. LOWS IN THE MID 20S. HIGHS IN THE LOWER 40S. WEST
WINDS AROUND 9 MPH.
MONDAY
PARTLY CLOUDY. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 30S.
WEST WINDS AROUND 9 MPH.
FORECASTER...HATTINGS
REQUESTED BY...JAMES BENDON
TYPE OF REQUEST...PRESCRIBED
.TAG 2527286.2/RIW
.DELDT 12/11/25
.FORMATTERVERSION 2.0.0
.EMAIL JAMES.BENDON@USDA.GOV
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