179
FNUS75 KCYS 301251
FWSCYS
SPOT FORECAST FOR LOG ROAD...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
651 AM MDT TUE JUN 30 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT
THIS EVENING...
DISCUSSION
CURRENT CONDITIONS IN THE VICINITY OF THE FIRE SHOW SOUTHWEST WINDS
AT 10 MPH WITH GUSTS TO 15 MPH. HUMIDITY RECOVERIES THIS MORNING ARE
RATHER POOR AT AROUND 40 PERCENT. WINDS WILL BECOME MORE SOUTHERLY AS
THE DAY PROGRESSES, WITH SUSTAINED WINDS OF 15 MPH AND GUSTS UP TO 30
MPH. HOTTER TEMPERATURES ARE EXPECTED THIS AFTERNOON WITH A HIGH IN THE
UPPER 80S. THIS WILL CONTRIBUTE TO DRY CONDITIONS AT THE SURFACE WITH A
MINIMUM RELATIVE HUMIDITY AROUND 15 PERCENT. MOSTLY SUNNY SKIES ARE
EXPECTED THROUGH MOST OF THE DAY, HOWEVER INCREASING CLOUDS WILL BE
POSSIBLE LATE THIS AFTERNOON AS PRECIPITATION CHANCES INCREASE.
SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP LATE THIS AFTERNOON AND
CONTINUE THROUGH ABOUT MIDNIGHT. THE BEST TIME FRAME TO SEE STORMS WILL
BE BETWEEN 4 PM AND 12 AM. A 40 PERCENT CHANCE OF RAIN IS EXPECTED
DURING THIS TIME. MOISTURE ALOFT WILL GRADUALLY INCREASE AS THE NIGHT
PROGRESSES. DRY LIGHTNING CANNOT BE RULED OUT DURING THE AFTERNOON AND
EVENING HOURS, BUT WETTING RAINS WILL BE POSSIBLE OVERNIGHT. STORMS COULD
CONTAIN GUSTY AND ERRATIC WINDS, AS WELL AS HAIL. A FEW LINGERING SHOWERS
WILL BE POSSIBLE AFTER MIDNIGHT. TUESDAY NIGHT HUMIDITY RECOVERIES ARE
EXPECTED TO BE BETTER, RECOVERING TO ABOUT 80 PERCENT. WINDS OVERNIGHT
WILL WEAKEN, BUT GENERALLY REMAIN SOUTHERLY. SIMILAR CONDITIONS ARE
EXPECTED FOR WEDNESDAY, WITH ALIKE TEMPERATURES AND HUMIDITY. WINDS WILL
BE WEAKER AND MORE WESTERLY, BUT WITH MINIMAL CHANCES FOR PRECIPITATION.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................2 PERCENT.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........14 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 9 TO 13 MPH SHIFTING TO THE
SOUTH 10 TO 12 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......10300 FT AGL INCREASING TO 11000 FT AGL LATE IN
THE AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 22 MPH SHIFTING TO THE SOUTH AROUND
16 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (9100 KNOT-FT) EARLY IN THE MORNING
INCREASING TO VERY GOOD (106800 KNOT-FT) IN THE
AFTERNOON INCREASING TO VERY GOOD (142700
KNOT-FT) EARLY IN THE MORNING INCREASING TO
EXCELLENT (198200 KNOT-FT) IN THE AFTERNOON IN
THE AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 1 1 3 4 2 4 6 8 22 41
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0
TEMP............59 64 69 73 76 80 83 86 88 88 85
RH..............38 32 26 23 20 17 15 14 14 15 16
20 FT WIND DIR..W SW SW SW SW SW SW SW SW S S
20 FT WIND SPD..10 10 12 12 12 13 13 12 12 12 12
20 FT WIND GUST.20 20 21 22 23 24 24 24 23 22 22
MIX HGT (KFT)...0.7 1.5 2.5 3.5 4.9 6.2 7.5 9.3 10 11 11
TRANSP WIND DIR.W W W W W W SW SW SW SW S
TRANSP WIND SPD.15 17 20 18 18 20 22 22 22 20 16
HAINES INDEX....M M M M M M M M M M M
SDSPL KT-FT/10009 23 45 58 78 107 144 177 198 187 156
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT). CHANCE OF
THUNDERSTORMS IN THE EVENING. CHANCE OF RAIN
SHOWERS IN THE EVENING AND OVERNIGHT, THEN
SLIGHT CHANCE OF RAIN SHOWERS AFTER 3 AM.
CWR.................13 PERCENT.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........80-86 PERCENT.
WIND (20 FT)........SOUTH WINDS 7 TO 12 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE
EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 13 TO 15 MPH SHIFTING TO THE SOUTHEAST 10
TO 14 MPH IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....GOOD (93400 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3900 KNOT-FT) LATE IN THE
NIGHT.
HAINES INDEX........MISSING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........56 69 72 66 68 59 57 55 42 38 33 22
WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC SCH SCH SCH
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........CHC CHC CHC CHC CHC CHC
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
TEMP............83 80 74 70 66 65 63 62 59 57 56 55
RH..............19 23 34 43 49 53 59 61 71 76 82 83
20 FT WIND DIR..S S S S S S SE S S S S SW
20 FT WIND SPD..12 10 10 10 10 10 10 10 9 8 8 8
20 FT WIND GUST.21 21 21 21 21 20 20 18 18 17 16 15
MIX HGT (KFT)...7.0 2.5 0.8 0.6 0.5 0.5 0.5 0.5 0.6 0.5 0.5 0.5
TRANSP WIND DIR.SW SE S S SE SE SE SE SE SE SE S
TRANSP WIND SPD.15 15 13 14 14 14 13 14 13 12 12 10
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100093 35 10 7 7 7 6 7 7 5 5 4
WEDNESDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................1 PERCENT.
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........14 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 7 TO 8 MPH SHIFTING TO THE
NORTHEAST AROUND 6 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......9900 FT AGL INCREASING TO 11800 FT AGL LATE IN
THE AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 9 MPH SHIFTING TO THE WEST 10 TO
17 MPH.
SMOKE DISPERSAL.....POOR (3700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (66600 KNOT-FT) IN THE
AFTERNOON INCREASING TO VERY GOOD (128300
KNOT-FT) EARLY IN THE MORNING INCREASING TO
EXCELLENT (176100 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 (%).........18 12 5 3 4 3 3 5 10 11 19 19
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............55 58 63 68 72 76 79 82 85 87 87 87
RH..............83 74 56 45 38 32 27 23 20 17 15 15
20 FT WIND DIR..SW SW SW W W W NW NW N N NE NE
20 FT WIND SPD..7 7 8 8 8 9 9 8 7 7 7 6
20 FT WIND GUST.15 15 15 16 17 17 17 16 15 14 13 12
MIX HGT (KFT)...0.5 0.9 1.8 2.6 3.9 5.1 6.7 9.9 11 11 12 12
TRANSP WIND DIR.S W W NW NW W W W W W W W
TRANSP WIND SPD.9 10 10 10 12 12 12 15 16 15 17 16
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10004 8 17 24 39 51 67 129 156 146 176 166
FORECASTER...FULLER
REQUESTED BY...CALEB MEYER
TYPE OF REQUEST...WILDFIRE
.TAG 2616505.0/CYS
.DELDT 06/30/26
.FORMATTERVERSION 2.0.0
.EMAIL CALEB.MEYER@USDA.GOV
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