475
FNUS75 KCYS 041549
FWSCYS
SPOT FORECAST FOR MURPHY FIRE...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
949 AM MDT THU JUN 4 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
A WARM AND DRY DAY IS EXPECTED WITH ABOVE AVERAGE TEMPERATURES. HIGH
TEMPERATURES WILL BE IN THE MID 80S WITH A MINIMUM RELATIVE HUMIDITY
AROUND 15 PERCENT. WINDS WILL PICK UP THIS AFTERNOON WITH SUSTAINED
WESTERLIES AT 20 MPH AND GUSTS UP TO 35 MPH. THIS WILL CREATE CRITICAL
FIRE WEATHER CONDITIONS ACROSS THE AREA. THERE IS A SLIGHT CHANCE OF AN
ISOLATED SHOWER/STORM THIS AFTERNOON. GIVEN THE VERY DRY MID AND LOW
LEVELS, VERY LITTLE MOISTURE IS EXPECTED TO REACH THE GROUND, LEADING
TO DRY LIGHTNING CONCERNS. GUSTY AND ERRATIC WINDS WILL ALSO BE POSSIBLE
IN AND AROUND THESE SHOWERS/STORMS. CANNOT RULE OUT ROGUE GUSTS OVER
50 MPH. OVERNIGHT HUMIDITY RECOVERIES WILL BE BETTER, RISING TO ABOUT
75 PERCENT WITH A LOW TEMPERATURE AROUND 50 DEGREES. WINDS WILL WEAKEN
OVERNIGHT BECOMING LIGHT AND VARIABLE. WARM AND DRY TEMPERATURES ARE
ONCE AGAIN FORECAST FOR FRIDAY, WITH HIGH TEMPERATURES AND MINIMUM
RELATIVE HUMIDITY VIRTUALLY THE SAME AS TODAY. HOWEVER, WESTERLY WINDS
ARE EXPECTED TO BE LIGHTER AT ABOUT 15 MPH WITH GUSTS TO 25 MPH.
PRECIPITATION CHANCES ARE NOT EXPECTED FRIDAY WITH MOSTLY SUNNY SKIES.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
CWR.................1 PERCENT.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........14 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 16 MPH.
MIXING HEIGHT.......14100 FT AGL.
TRANSPORT WINDS.....WEST 20 TO 28 MPH.
SMOKE DISPERSAL..... VERY GOOD (144300 KNOT-FT) EARLY IN THE
MORNING INCREASING TO EXCELLENT (217700
KNOT-FT) IN THE AFTERNOON INCREASING TO
EXCELLENT (260400 KNOT-FT) IN THE AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 33 49 50 55 55 52 53
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0
TEMP............75 79 79 80 82 83 83 83
RH..............20 17 16 16 15 15 15 14
20 FT WIND DIR..W W W W W W W W
20 FT WIND SPD..10 12 12 14 14 13 16 16
20 FT WIND GUST.22 24 25 26 28 26 29 29
MIX HGT (KFT)...8.5 12 13 14 14 14 13 13
TRANSP WIND DIR.W W W W W W W W
TRANSP WIND SPD.20 21 23 24 24 26 28 26
HAINES INDEX....M M M M M M M M
SDSPL KT-FT/1000144 218 260 296 296 323 314 301
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (20-30 PERCENT) THEN BECOMING
MOSTLY CLEAR (15-25 PERCENT).
CWR.................1 PERCENT.
MIN TEMPERATURE.....AROUND 49.
MAX HUMIDITY........77 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 16 MPH BECOMING LIGHT.
MIXING HEIGHT.......7100 FT AGL DECREASING TO 500 FT AGL EARLY IN
THE EVENING.
TRANSPORT WINDS.....WEST 16 TO 25 MPH SHIFTING TO THE NORTH 8 TO 17
MPH IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....EXCELLENT (294700 KNOT-FT) DECREASING TO POOR
(4400 KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........53 41 33 19 11 3 10 18 19 26 34 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............81 79 74 67 63 60 58 56 55 52 51 51
RH..............15 16 23 32 38 44 49 57 59 71 70 70
20 FT WIND DIR..W W W NW NW N N N N N NW NW
20 FT WIND SPD..16 14 10 9 8 7 7 6 5 3 2 2
20 FT WIND GUST.30 25 21 17 15 13 12 10 9 7 6 6
MIX HGT (KFT)...13 7.1 0.9 0.6 0.6 0.6 0.5 0.6 0.6 0.6 0.6 0.6
TRANSP WIND DIR.W W W NW NW N N N N N N NW
TRANSP WIND SPD.25 24 16 14 16 17 16 15 13 12 9 8
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/1000295 150 13 7 8 9 8 7 6 6 5 4
FRIDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................2 PERCENT.
MAX TEMPERATURE.....AROUND 83.
MIN HUMIDITY........14 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 6 TO 9 MPH LATE
IN THE MORNING, THEN SHIFTING TO THE WEST 10 TO
12 MPH IN THE AFTERNOON.
MIXING HEIGHT.......10400 FT AGL INCREASING TO 10600 FT AGL LATE IN
THE AFTERNOON.
TRANSPORT WINDS.....WEST 7 TO 9 MPH INCREASING TO AROUND 21 MPH.
SMOKE DISPERSAL.....POOR (3500 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (94200 KNOT-FT) IN THE
AFTERNOON INCREASING TO VERY GOOD (129700
KNOT-FT) EARLY IN THE MORNING INCREASING TO
EXCELLENT (189900 KNOT-FT) IN THE AFTERNOON IN
THE AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........32 32 27 15 14 14 12 11 12 9 3 5
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............50 53 57 61 68 73 75 77 81 81 82 83
RH..............77 69 64 55 40 30 25 23 18 16 15 14
20 FT WIND DIR..W W S S S SW SW W W W W W
20 FT WIND SPD..2 2 2 3 6 7 9 10 12 12 12 12
20 FT WIND GUST.6 6 6 9 13 15 18 21 22 23 22 22
MIX HGT (KFT)...0.6 1.5 2.1 3.2 4.9 6.7 7.8 8.6 9.3 10 10 11
TRANSP WIND DIR.NW W W W W W W W W W W W
TRANSP WIND SPD.7 7 8 9 10 12 14 17 18 21 21 21
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10004 9 15 26 44 67 94 130 148 183 187 190
FORECASTER...FULLER
REQUESTED BY...BRADLEY INGLE ICT5
TYPE OF REQUEST...WILDFIRE
.TAG 2614964.0/CYS
.DELDT 06/04/26
.FORMATTERVERSION 2.0.0
.EMAIL BRADLEY.INGLE@USDA.GOV
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