067
FNUS75 KCYS 301819
FWSCYS
SPOT FORECAST FOR ACORN PILE RX...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
1119 AM MST FRI JAN 30 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
FOR MONDAY A STRONG UPPER LEVEL RIDGE WILL BE SET UP OVER THE INTERMOUNTAIN WEST.
A PRETTY STRONG LOW LEVEL INVERSION WILL BE IN PLACE IN THE MORNING BUT WILL
SLOWLY ERODE AWAY THROUGHOUT THE DAY AS DIURNAL MIXING OCCURS. THIS WILL CAUSE
SMOKE DISPERSAL TO IMPROVE OVER THE COURSE OF THE DAY AS WELL. MODEL SOUNDINGS DO
INDICATE THAT A NOCTURNAL INVERSION WILL SET UP OVERNIGHT THUS RETURNING A LIMITED
SMOKE DISPERSION STATE ONCE THE BOUNDARY LAYER DISCONNECTS AND THE INVERSION SETS IN.
OTHERWISE IT WILL BE A LITTLE GUSTY OR THE WYOMING USUAL AMOUNT OF WIND IN THE
AFTERNOON BUT NO HIGH WIND SCENARIOS ARE EXPECTED. TUESDAY AND WEDNESDAY, ANOTHER FRONT
WILL PUSH THROUGH THE MOUNTAINS DROPPING TEMPERATURES AND SLIGHTLY INCREASING THE WINDS.
THERE IS GOING TO BE A SLIGHT CHANCE FOR SNOW BY TUESDAY AFTERNOON INTO WEDNESDAY MORNING
FOR THE MEDBOW FOREST/ENCAMPMENT AREA.
MONDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
CWR.................1 PERCENT.
MAX TEMPERATURE.....AROUND 35.
MIN HUMIDITY........46 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 12 MPH WITH GUSTS TO AROUND
29 MPH.
MIXING HEIGHT.......2900 FT AGL.
TRANSPORT WINDS.....WEST 16 TO 23 MPH.
SMOKE DISPERSAL.....POOR (8200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (58200 KNOT-FT) IN THE
AFTERNOON.
TIME (MST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........59 59 45 32 18 16 14 12
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0
TEMP............31 33 34 35 35 34 32 30
RH..............52 48 46 46 46 47 50 52
20 FT WIND DIR..SW W W W W W W W
20 FT WIND SPD..12 12 12 12 12 12 12 12
20 FT WIND GUST.25 28 29 28 28 28 26 25
MIX HGT (KFT)...1.5 2.1 2.6 2.9 2.9 2.3 1.4 0.6
TRANSP WIND DIR.W W W W W W W W
TRANSP WIND SPD.18 20 21 23 23 21 18 16
SDSPL KT-FT/100023 35 47 58 58 41 22 8
MONDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (45-55 PERCENT).
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 18.
MAX HUMIDITY........73 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 8 TO 12 MPH.
MIXING HEIGHT.......200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 12 TO 18 MPH.
SMOKE DISPERSAL.....POOR (2200 KNOT-FT).
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........12 13 13 17 20 24 27 29 32 38 45 51
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............29 27 26 25 24 23 22 22 21 20 20 20
RH..............54 56 57 60 62 65 67 69 71 72 72 72
20 FT WIND DIR..W W W W SW SW SW SW SW SW SW SW
20 FT WIND SPD..12 10 10 9 9 8 8 8 8 8 8 8
20 FT WIND GUST.23 22 20 18 17 17 17 16 16 16 16 16
MIX HGT (KFT)...0.3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2
TRANSP WIND DIR.W W W W W SW SW SW SW SW SW SW
TRANSP WIND SPD.16 18 18 16 14 12 12 14 15 15 15 15
SDSPL KT-FT/10004 3 4 3 2 2 2 3 3 3 3 3
FORECASTER...MCLAUGHLIN
REQUESTED BY...RONALD ZUCHOWSKI
TYPE OF REQUEST...PRESCRIBED
.TAG 2601402.0/CYS
.DELDT 01/30/26
.FORMATTERVERSION 2.0.0
.EMAIL RONALD.ZUCHOWSKI@USDA.GOV
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