131
FNUS75 KCYS 272109
FWSCYS
SPOT FORECAST FOR BALD FIRE...CASPER INTERAGENCY DISPATCH CENTER
NATIONAL WEATHER SERVICE CHEYENNE WY
309 PM MDT THU AUG 27 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
WEST WINDS THIS AFTERNOON WILL BECOME VARIABLE THIS EVENING AND
OVERNIGHT WITH A FEW HIGH-BASED LIGHT SHOWERS IN THE AREA. EXPECT
HUMIDITY RECOVERIES TO AROUND 50 PERCENT.
THE PRIMARY CONCERNS ON FRIDAY WILL BE INCREASING PREVAILING WINDS
WITH WEST-SOUTHWEST WINDS SUSTAINED 10 TO 20 MPH, GUSTING TO AROUND
35 MPH, AND THE POTENTIAL FOR GUSTY SHOWERS/THUNDERSTORMS. SCATTERED
SHOWERS AND THUNDERSTORMS WILL DEVELOP EARLY FRIDAY AFTERNOON.
LOCALIZED WIND GUSTS UP TO AROUND 50 MPH WILL BE POSSIBLE NEAR AND
UNDER THIS ACTIVITY, BUT THE CHANCE FOR WETTING RAINFALL REMAINS
LOW. THE MOST LIKELY TIMING FOR GUSTY THUNDERSTORM WINDS IS BETWEEN
2PM AND 6PM. IMPROVED MOISTURE WILL BE MOVING IN ALOFT, BUT THE LOWER
ATMOSPHERE WILL REMAIN SOMEWHAT DRY, WITH MINIMUM RH AROUND 20 TO 25
PERCENT. EXPECT WEST-SOUTHWEST WINDS TO CONTINUE FRIDAY NIGHT. WHILE
MOST GUSTS WILL BE AROUND 20 MPH, THE CHANCE FOR A FEW GUSTY SHOWERS
WILL CONTINUE THROUGH THE OVERNIGHT HOURS. GUSTS OF 30 TO 40 MPH
WILL BE POSSIBLE AGAIN LATE IN THE EVENING OR EARLY MORNING IF THIS
SECOND ROUND MATERIALIZES.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
CWR.................1 PERCENT.
MIN TEMPERATURE.....AROUND 56.
MAX HUMIDITY........AROUND 50 PERCENT.
WIND (20 FT)........WEST TO VARIABLE WINDS 5 TO 10 MPH.
MIXING HEIGHT.......7100 FT AGL DECREASING TO 500 FT AGL EARLY IN
THE EVENING.
TRANSPORT WINDS.....BETWEEN SOUTHWEST AND SOUTHEAST AT 8 TO 12 MPH.
SMOKE DISPERSAL.....GOOD (87400 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (4400 KNOT-FT) LATE IN THE
NIGHT.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........24 34 44 42 35 45 39 50 35 34 48 50
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............73 72 69 64 62 61 60 60 59 59 57 57
RH..............20 21 24 30 34 38 41 41 42 42 45 45
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..7 7 7 8 7 7 7 7 8 9 9 9
20 FT WIND GUST.14 14 15 15 14 14 13 14 15 16 17 17
MIX HGT (KFT)...11 7.1 0.7 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W SW SW SE SW SE SW SW W SW W W
TRANSP WIND SPD.9 9 9 10 9 9 9 9 10 12 12 12
SDSPL KT-FT/100087 57 5 5 5 5 5 4 5 6 6 6
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
CWR.................4 PERCENT.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........20 TO 25 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 20 MPH. GUSTS UP TO 35 MPH.
GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......10000 FT AGL INCREASING TO 11000 FT AGL LATE IN
THE AFTERNOON.
TRANSPORT WINDS.....WEST 12 TO 21 MPH INCREASING TO 24 TO 28 MPH IN
THE AFTERNOON.
SMOKE DISPERSAL.....POOR (5300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (80900 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (182200
KNOT-FT).
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........52 66 45 44 57 31 22 35 50 60 68 75
WEATHER COV..... SCH SCH SCH SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............56 56 59 60 64 66 70 73 73 75 73 73
RH..............49 49 45 44 40 37 31 28 27 24 27 27
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..9 9 9 9 12 13 15 16 17 18 18 17
20 FT WIND GUST.17 17 17 17 21 24 28 31 32 33 35 33
MIX HGT (KFT)...0.6 0.5 0.6 1.3 2.7 5.1 8.1 10 11 11 9.3 7.6
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.12 12 12 14 17 18 21 24 25 26 26 28
SDSPL KT-FT/10006 5 6 16 41 81 146 210 242 252 214 182
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT).
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........AROUND 50 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 15 MPH. GUSTS UP TO 35
MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST 21 TO 28 MPH DECREASING TO 9 TO 16 MPH
EARLY IN THE EVENING.
SMOKE DISPERSAL..... VERY GOOD (135300 KNOT-FT) EARLY IN THE
EVENING DECREASING TO GOOD (80700 KNOT-FT) LATE
IN THE NIGHT DECREASING TO POOR (4200 KNOT-FT)
EARLY IN THE EVENING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........66 79 75 69 74 66 79 68 72 71 81 61
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............71 69 66 64 63 61 60 60 59 59 58 57
RH..............30 32 37 41 43 44 46 46 47 47 49 51
20 FT WIND DIR..W W W W W SW SW SW SW SW SW SW
20 FT WIND SPD..16 15 13 10 8 7 7 7 8 9 9 9
20 FT WIND GUST.32 28 23 20 16 13 13 13 15 17 17 17
MIX HGT (KFT)...5.6 4.5 1.6 0.6 0.6 0.5 0.6 0.5 0.5 0.6 0.5 0.5
TRANSP WIND DIR.W W W W W W W SW SW SW SW W
TRANSP WIND SPD.28 21 16 13 10 10 10 9 10 12 12 12
SDSPL KT-FT/1000135 81 22 6 5 5 5 4 5 6 5 5
FORECASTER...NATOLI
REQUESTED BY...TEDDY DONOGHUE
TYPE OF REQUEST...WILDFIRE
.TAG 2620718.0/CYS
.DELDT 08/27/26
.FORMATTERVERSION 2.0.0
.EMAIL MVANPATTER@BLM.GOV,WYCPC@FIRENET.GOV
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