603
FNUS75 KCYS 100354
FWSCYS
SPOT FORECAST FOR SOUTH FORK...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
954 PM MDT TUE JUN 9 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT WEDNESDAY FOR THE WESTERN
NEBRASKA PANHANDLE...
DISCUSSION
VERY BREEZY WINDS EXPECTED TONIGHT BEHIND A PASSING COLD FRONT. CURRENT
GUSTS RANGE BETWEEN 40 AND 45 MPH FROM THE WEST. WINDS ARE EXPECTED TO
REMAIN BREEZY THROUGH THE OVERNIGHT HOURS, BUT WILL DECREASE TO AROUND
15 TO 20 MPH STARTING AT 11PM AND CONTINUING THROUGH 4AM. WINDS WILL
REMAIN WESTERLY AND INCREASE TO 20 TO 25 MPH GUSTING OVER 40 MPH BY
9AM. STRONG WEST WINDS WILL CONTINUE THROUGH THE AFTERNOON AND LATE
EVENING HOURS WEDNESDAY. WINDS SHIFT NORTHWESTERLY AROUND 9PM WEDNESDAY
EVENING, BUT MAINTAIN STRENGTH. OVERNIGHT HUMIDITY RECOVERIES TUESDAY
NIGHT INTO WEDNESDAY MORNING WILL BE POOR, AROUND 45 TO 50 PERCENT. VERY
DRY AFTERNOON CONDITIONS EXPECTED WEDNESDAY WITH AFTERNOON MINIMUM
HUMIDITY VALUES AROUND 10 TO 15 PERCENT. MINIMAL PRECIPITATION EXPECTED
WEDNESDAY WITH MOSTLY CLEAR SKIES BECOMING MOSTLY CLOUDY FOR THE LATE
AFTERNOON AND EVENING HOURS.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
CLEAR (0-10 PERCENT).
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........49 PERCENT.
WIND (20 FT)........WEST WINDS 9 TO 15 MPH. GUSTS UP TO 31 MPH
OVERNIGHT.
MIXING HEIGHT.......700 FT AGL.
TRANSPORT WINDS.....WEST 16 TO 24 MPH.
SMOKE DISPERSAL.....POOR (10700 KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........52 56 68 79 67 47 26 5
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0
TEMP............67 65 64 63 61 60 58 56
RH..............30 34 37 39 41 41 44 49
20 FT WIND DIR..W W W W W W W W
20 FT WIND SPD..14 12 9 10 12 14 15 14
20 FT WIND GUST.20 18 17 18 22 26 31 30
MIX HGT (KFT)...0.7 0.7 0.8 0.7 0.7 0.7 0.8 0.7
TRANSP WIND DIR.W W W W W W W W
TRANSP WIND SPD.24 18 16 17 20 20 20 18
HAINES INDEX....M M M M M M M M
SDSPL KT-FT/100015 11 11 11 13 12 14 11
WEDNESDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........11 PERCENT.
WIND (20 FT)........WEST WINDS 14 TO 22 MPH. GUSTS UP TO 37 MPH
INCREASING TO 49 MPH IN THE AFTERNOON.
MIXING HEIGHT.......10200 FT AGL INCREASING TO 13300 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....WEST 18 TO 26 MPH INCREASING TO 29 TO 37 MPH
LATE IN THE MORNING.
SMOKE DISPERSAL.....POOR (12900 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (107900 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (406000
KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........15 8 2 2 2 6 5 8 11 23 46 42
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............54 56 59 62 66 69 72 75 78 79 80 81
RH..............46 46 42 38 30 23 19 15 13 12 11 11
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..14 14 15 15 16 16 16 17 20 21 22 22
20 FT WIND GUST.30 29 31 32 33 36 37 40 43 46 47 49
MIX HGT (KFT)...0.8 1.8 3.7 5.4 7.2 8.9 10 11 12 12 13 13
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.18 20 23 23 26 29 32 33 35 35 36 37
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100013 31 74 108 165 222 285 320 355 371 406 426
WEDNESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT).
CWR.................2 PERCENT.
MIN TEMPERATURE.....AROUND 46.
MAX HUMIDITY........57 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 15 TO 21 MPH WITH GUSTS TO
AROUND 47 MPH DECREASING TO 12 TO 14 MPH WITH
GUSTS TO AROUND 29 MPH LATE IN THE EVENING.
MIXING HEIGHT.......6000 FT AGL DECREASING TO 700 FT AGL EARLY IN
THE EVENING.
TRANSPORT WINDS.....WEST 26 TO 33 MPH BECOMING NORTHWEST 18 TO 21
MPH EARLY IN THE EVENING.
SMOKE DISPERSAL.....EXCELLENT (367900 KNOT-FT) DECREASING TO POOR
(11700 KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........29 46 58 65 52 62 60 71 39 45 31 14
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............80 79 74 67 63 60 56 54 52 49 48 47
RH..............12 13 16 22 29 35 43 45 48 51 53 56
20 FT WIND DIR..W W NW NW NW NW NW NW NW W W W
20 FT WIND SPD..21 18 16 16 15 12 12 12 12 12 13 14
20 FT WIND GUST.47 43 39 36 32 28 24 24 24 25 28 29
MIX HGT (KFT)...13 6.0 1.4 1.3 1.3 1.1 1.2 1.1 0.9 1.0 1.1 0.7
TRANSP WIND DIR.W W W NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.33 26 21 20 21 21 20 20 18 20 21 20
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/1000368 137 25 23 23 19 20 19 14 18 19 12
THURSDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 72.
MIN HUMIDITY........23 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 14 TO 21 MPH. GUSTS UP TO 39
MPH INCREASING TO 45 MPH IN THE LATE MORNING
AND AFTERNOON, THEN DECREASING TO 33 MPH LATE
IN THE AFTERNOON.
MIXING HEIGHT.......7600 FT AGL.
TRANSPORT WINDS.....NORTHWEST 20 TO 29 MPH INCREASING TO 28 TO 33
MPH IN THE LATE MORNING AND EARLY AFTERNOON,
THEN DECREASING TO 21 TO 23 MPH LATE IN THE
AFTERNOON.
SMOKE DISPERSAL.....POOR (15200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (102900 KNOT-FT) IN THE
AFTERNOON INCREASING TO VERY GOOD (135200
KNOT-FT) EARLY IN THE MORNING INCREASING TO
EXCELLENT (193200 KNOT-FT) IN THE AFTERNOON IN
THE LATE MORNING AND AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........19 10 19 5 12 21 27 16 28 26 22 11
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............46 48 52 54 59 61 63 65 68 70 70 72
RH..............57 55 47 43 37 35 34 30 28 26 24 23
20 FT WIND DIR..W W NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..14 16 17 20 21 21 21 21 20 18 16 15
20 FT WIND GUST.30 33 37 39 43 45 43 41 41 40 37 33
MIX HGT (KFT)...0.9 2.8 4.1 5.2 5.9 6.4 6.7 6.5 6.9 7.2 7.2 7.6
TRANSP WIND DIR.W NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.20 24 29 30 30 33 33 30 28 28 23 21
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100015 59 103 135 153 185 193 169 166 172 143 136
FORECASTER...MOSE
REQUESTED BY...RYAN FLYNN
TYPE OF REQUEST...WILDFIRE
.TAG 2615278.0/CYS
.DELDT 06/09/26
.FORMATTERVERSION 2.0.0
.EMAIL SDGPC@FIRENET.GOV
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