101
FNUS75 KCYS 280329
FWSCYS
SPOT FORECAST FOR EWC...FOREST SERVICE
NATIONAL WEATHER SERVICE CHEYENNE WY
929 PM MDT THU AUG 27 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
SOME LIGHT SHOWERS MAY PASS OVER THE EWC BURN AREA LATE TONIGHT INTO EARLY TOMORROW MORNING
IF THEY MANAGE TO STAY TOGETHER FROM SOUTHERN CONVERSE COUNTY (MEDIUM CONFIDENCE SCENARIO).
A NOCTURNAL INVERSION LOOKS TO SET UP EARLY IN THE MORNING POSSIBLY LIMITING SMOKE DISPERSAL
BUT THINGS SHOULD BECOME BETTER ONCE DIURNAL MIXING STARTS. FRIDAY AFTERNOON WIND GUSTS UP
TO 30 MPH LOOKS POSSIBLE AS THE 700MB PRESSURE GRADIENT TIGHTENS FROM THE LOW PRESSURE SYSTEM
MOVING ALONG THE CANADIAN BORDER. THERE ARE SOME THUNDERSTORMS FORECASTED FOR TOMORROW AND
BETWEEN 3 AND 6 PM CURRENTLY LOOK TO BE THE BEST TIMING FOR THOSE SHOWERS TO MOVE OVER THE
EWC AREA. THE CHANCE FOR WETTING RAIN IS AROUND 5 TO 10 PERCENT DEPENDING ON THE SPEED OF
THESE STORMS.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT).
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 66.
MAX HUMIDITY........42 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS AROUND 13 MPH.
TRANSPORT WINDS.....WEST AROUND 16 MPH.
TIME (MDT) 5AM
SKY (%).........57
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0
TEMP............67
RH..............39
20 FT WIND DIR..SW
20 FT WIND SPD..13
20 FT WIND GUST.21
TRANSP WIND DIR.W
TRANSP WIND SPD.16
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT).
CWR.................3 PERCENT.
MAX TEMPERATURE.....AROUND 83.
MIN HUMIDITY........25 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 14 MPH WITH GUSTS TO AROUND 29
MPH.
TRANSPORT WINDS.....WEST 16 TO 25 MPH INCREASING TO 25 TO 28 MPH IN
THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........43 52 37 49 36 45 40 53 53 61 73 89
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............68 68 69 73 75 77 80 81 81 82 81 78
RH..............35 35 36 34 31 29 26 25 25 25 26 30
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..13 14 13 12 10 12 12 12 13 13 13 12
20 FT WIND GUST.21 23 24 24 23 23 24 26 29 29 29 28
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.16 17 16 20 20 22 25 26 26 25 25 28
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT).
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 65.
MAX HUMIDITY........47 PERCENT.
WIND (20 FT)........WEST WINDS 8 TO 12 MPH. GUSTS UP TO 25 MPH
EARLY IN THE EVENING.
TRANSPORT WINDS.....WEST 21 TO 25 MPH DECREASING TO 14 TO 21 MPH
EARLY IN THE EVENING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........85 87 90 80 69 59 55 72 77 68 72 74
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............75 74 71 68 67 67 66 67 67 67 68 68
RH..............34 35 41 45 46 47 47 43 41 43 40 42
20 FT WIND DIR..W W W W W W SW SW W W W W
20 FT WIND SPD..12 9 9 8 9 9 10 10 10 12 12 12
20 FT WIND GUST.25 22 20 18 18 18 18 18 18 20 20 20
TRANSP WIND DIR.W W W W W SW SW W W W W W
TRANSP WIND SPD.25 21 15 14 18 17 17 18 20 20 20 21
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF
SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 24 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 81.
MIN HUMIDITY........28 PERCENT.
WIND (20 FT)........WEST WINDS 12 TO 17 MPH. GUSTS UP TO 36 MPH
LATE IN THE MORNING. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON.
TRANSPORT WINDS.....WEST 17 TO 26 MPH.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........70 89 72 85 82 81 80 74 73 66 81 86
WEATHER COV..... CHC SCH
WEATHER TYPE.... RW RW
TSTM COV........ CHC SCH
CWR.............0 0 0 0 0 0 20 20 20 20 20 20
TEMP............68 68 68 71 74 77 78 79 80 78 77 75
RH..............42 40 44 39 35 31 31 29 28 31 32 34
20 FT WIND DIR..W SW SW SW W W W W W W W W
20 FT WIND SPD..12 12 13 12 12 14 15 16 16 16 17 16
20 FT WIND GUST.20 22 24 24 26 30 31 33 36 35 36 36
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.20 17 17 17 21 23 26 25 25 24 23 24
FORECASTER...MCLAUGHLIN
REQUESTED BY...JAY MILLER
TYPE OF REQUEST...WILDFIRE
.TAG 2620771.0/CYS
.DELDT 08/28/26
.FORMATTERVERSION 2.0.0
.EMAIL WYCPC@FIRENET.GOV,ROB_NEIBAUER@FIRENET.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page