356
FNUS75 KCYS 161449
FWSCYS
SPOT FORECAST FOR BASALT RX...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
749 AM MST TUE DEC 16 2025
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
A THERMAL RIDGE WILL KEEP TEMPERATURES ABOVE FREEZING DURING THE DAY BUT CREATES IN THE MID AND UPPER LEVELS WHICH MAY HINDER
ANY SMOKE DISPERSAL ONCE AWAY FROM THE SURFACE. A 700MB JET HAS SET UP AND WILL REMAIN ACTIVE OVER THE NEXT COUPLE OF DAYS
KEEPING WIND GUSTS BETWEEN 55 TO 70 MPH THIS MORNING AND DROPPING DOWN BETWEEN 45 TO 55 MPH BY THE AFTERNOON. TOMORROW, A WEAK
CLIPPER SYSTEM MOVES THROUGH MONTANA AND THE NORTHERN PLAINS. THIS WILL SUSTAIN THE 700MB JET OVERNIGHT INTO TOMORROW BUT ALSO
CREATE SOME SNOW AND MIXED PRECIP CHANCES FOR THE MEDBOW AREA BY THE AFTERNOON. BY FRIDAY MORNING A RIDGE WILL SETTLE BACK IN
WITH THE WINDS DIEING DOWN BY THE WEEKEND.
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT) THEN BECOMING MOSTLY
SUNNY (45-55 PERCENT).
CWR.................1 PERCENT.
MAX TEMPERATURE.....AROUND 38.
MIN HUMIDITY........44 PERCENT.
WIND (20 FT)........WEST WINDS 16 TO 20 MPH WITH GUSTS TO AROUND 36
MPH.
MIXING HEIGHT.......2100 FT AGL.
TRANSPORT WINDS.....WEST 26 TO 35 MPH.
SMOKE DISPERSAL.....POOR (14000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (61100 KNOT-FT) IN THE
AFTERNOON.
TIME (MST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........17 12 13 20 20 57 62 54 44 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............29 32 35 36 37 38 36 36 34 30
RH..............63 61 56 54 54 52 59 56 64 75
20 FT WIND DIR..W W W W W W W W W W
20 FT WIND SPD..18 20 20 20 20 20 20 18 17 16
20 FT WIND GUST.33 35 35 36 36 36 35 33 31 30
MIX HGT (KFT)...0.8 1.0 1.5 1.8 2.0 2.1 2.1 1.8 1.1 0.6
TRANSP WIND DIR.W W W W W W W W W SW
TRANSP WIND SPD.31 30 32 35 33 33 33 32 26 26
SDSPL KT-FT/100023 25 43 55 57 61 60 50 26 14
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
CWR.................4 PERCENT.
MIN TEMPERATURE.....AROUND 26.
MAX HUMIDITY........75 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 16 TO 21 MPH. GUSTS UP TO 43
MPH EARLY IN THE MORNING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 26 TO 33 MPH INCREASING TO 35 TO 36
MPH AFTER 3 AM.
SMOKE DISPERSAL.....POOR (8900 KNOT-FT).
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........28 30 42 34 43 32 25 33 28 23 38 30
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............29 29 29 29 29 28 28 28 27 28 28 28
RH..............75 72 72 72 72 71 71 71 74 75 71 71
20 FT WIND DIR..W SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..16 16 16 16 16 17 17 16 17 17 18 21
20 FT WIND GUST.29 29 30 30 31 31 31 31 31 32 33 43
MIX HGT (KFT)...0.6 0.4 0.4 0.5 0.6 0.7 0.6 0.6 0.6 0.6 0.6 0.6
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.26 28 28 29 30 31 31 32 33 32 36 35
SDSPL KT-FT/100013 9 10 13 14 19 16 16 18 17 20 17
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). SNOW SHOWERS LATE
IN THE MORNING. CHANCE OF SNOW SHOWERS LATE IN
THE AFTERNOON. AREAS OF BLOWING SNOW LATE IN
THE AFTERNOON.
CWR.................4 PERCENT INCREASING TO 73 PERCENT LATE IN THE
MORNING, THEN DECREASING TO 21 PERCENT LATE IN
THE AFTERNOON.
MAX TEMPERATURE.....AROUND 38.
MIN HUMIDITY........59 PERCENT.
WIND (20 FT)........WINDY. SOUTHWEST WINDS 21 TO 30 MPH. GUSTS UP
TO 54 MPH INCREASING TO 60 MPH LATE IN THE
AFTERNOON.
MIXING HEIGHT.......2600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 40 TO 49 MPH SHIFTING TO THE WEST 52
TO 55 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (32300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (111900 KNOT-FT) IN THE
AFTERNOON.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........41 41 32 48 47 69 72 76 79 80 82 83
WEATHER COV..... DEF DEF DEF DEF DEF DEF CHC
WEATHER TYPE.... SW SW SW SW SW SW SW
TSTM COV........
CWR.............0 0 0 0 0 70 70 70 70 70 70 20
TEMP............29 30 32 35 36 36 36 35 35 32 30 27
RH..............69 69 63 59 59 61 64 69 69 82 88 92
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW W W W
20 FT WIND SPD..21 22 24 24 25 25 25 26 28 28 29 30
20 FT WIND GUST.45 47 49 51 51 52 53 54 55 58 59 60
MIX HGT (KFT)...0.9 1.0 1.4 1.6 1.8 2.0 2.3 2.5 2.6 2.5 2.3 2.2
TRANSP WIND DIR.SW SW SW SW SW SW SW W W W W W
TRANSP WIND SPD.40 43 45 47 48 49 49 49 49 52 53 55
SDSPL KT-FT/100032 37 56 65 75 86 97 107 112 112 106 106
FORECASTER...MCLAUGHLIN
REQUESTED BY...PARKER JOHNSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2527795.0/CYS
.DELDT 12/16/25
.FORMATTERVERSION 2.0.0
.EMAIL PARKER.JOHNSON@USDA.GOV
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