800
FNUS75 KCYS 212259
FWSCYS
SPOT FORECAST FOR SANDSTONE NORTH GNA...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
359 PM MST WED JAN 21 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
THE MAIN CONCERNS WE'RE LOOKING AT WILL BE AN ARCTIC AIRMASS
INCOMING THAT WILL BRING COLD WINDS FOLLOWED BY A CHANCE OF SNOW
ON FRIDAY. FOR THURSDAY, WINDS SHOULD BE ON THE LIGHT SIDE,
ALONGSIDE PARTLY CLOUDY SKIES. FRIDAY HIGHS WON'T GET ABOVE
FREEZING AND SNOW BEGINS TO APPEAR DURING THE AFTERNOON AND
EVENING.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 34.
MIN HUMIDITY........33 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 7 MPH IN
THE LATE MORNING AND AFTERNOON, THEN BECOMING
LIGHT LATE IN THE AFTERNOON.
MIXING HEIGHT.......2800 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 17 MPH SHIFTING TO THE WEST 9 TO
18 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3100 KNOT-FT) EARLY IN THE MORNING INCREASING
TO FAIR (4500 KNOT-FT) IN THE AFTERNOON.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........26 26 30 30 30 47 47 47 59 59 59 63
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............13 13 15 19 26 31 32 34 34 34 32 27
RH..............64 64 58 54 44 36 36 33 33 33 36 46
20 FT WIND DIR..S S S S SW SW SW W W W SW SW
20 FT WIND SPD..3 3 3 3 5 5 6 7 7 6 5 3
20 FT WIND GUST.7 7 7 8 8 9 10 12 13 10 9 7
MIX HGT (KFT)...0.4 0.4 0.5 0.8 1.2 1.7 2.3 2.7 2.8 2.2 1.3 0.7
TRANSP WIND DIR.W SW SW SW SW W W W W W W W
TRANSP WIND SPD.10 8 9 8 9 12 15 17 18 15 12 9
SDSPL KT-FT/10004 3 4 6 10 17 29 41 45 28 13 6
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT).
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 13.
MAX HUMIDITY........76 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 TO 8 MPH SHIFTING TO THE SOUTH
AROUND 6 MPH AFTER 3 AM.
SMOKE DISPERSAL.....POOR (1600 KNOT-FT).
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........62 63 55 44 44 50 54 54 53 53 53 57
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............26 23 22 20 20 19 18 17 16 16 16 15
RH..............46 52 52 56 54 56 59 61 64 64 64 67
20 FT WIND DIR..SW S S S SE SE SE SE SE SE SE SE
20 FT WIND SPD..2 2 2 2 2 2 2 2 2 2 2 2
20 FT WIND GUST.6 5 5 3 3 3 3 3 3 3 5 5
MIX HGT (KFT)...0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.SW SW SW W SW SW S S S S S S
TRANSP WIND SPD.8 8 8 6 5 5 5 5 5 5 6 6
SDSPL KT-FT/10003 3 3 2 2 2 2 2 2 2 2 2
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF SNOW
LATE IN THE MORNING. CHANCE OF SNOW SHOWERS
LATE IN THE AFTERNOON.
CWR.................10 PERCENT.
MAX TEMPERATURE.....AROUND 27.
MIN HUMIDITY........48 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST AROUND 5 MPH
LATE IN THE AFTERNOON, THEN BECOMING LIGHT LATE
IN THE AFTERNOON.
MIXING HEIGHT.......2400 FT AGL.
TRANSPORT WINDS.....SOUTH 6 TO 8 MPH SHIFTING TO THE NORTHWEST 6 TO
7 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (1200 KNOT-FT).
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........59 61 64 67 70 73 76 79 83 84 85 89
WEATHER COV..... CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... SN SN SN SN SN SN SW
TSTM COV........
CWR.............0 0 0 0 0 10 10 10 10 10 10 10
TEMP............14 13 14 17 20 24 26 27 27 25 23 22
RH..............70 76 73 64 59 52 48 48 48 52 59 59
20 FT WIND DIR..SE SE SE S SW W W W W NW NW NW
20 FT WIND SPD..2 2 2 2 2 2 3 5 5 5 5 3
20 FT WIND GUST.3 3 3 3 5 6 7 8 9 8 8 9
MIX HGT (KFT)...0.3 0.2 0.3 0.8 1.4 1.9 2.2 2.4 2.3 2.0 1.5 1.0
TRANSP WIND DIR.S S S S SW SW W W W W NW NW
TRANSP WIND SPD.6 6 6 7 8 9 10 12 12 10 7 6
SDSPL KT-FT/10002 1 2 5 10 15 20 24 23 18 9 5
FORECASTER...GOATLEY
REQUESTED BY...PARKER JOHNSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2600297.0/CYS
.DELDT 01/21/26
.FORMATTERVERSION 2.0.0
.EMAIL PARKER.JOHNSON@USDA.GOV
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