050
FNUS75 KCYS 220203
FWSCYS
SPOT FORECAST FOR IA 316...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
803 PM MDT TUE JUL 21 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE AT (307) 772-2227
DISCUSSION
SHOWERS AND THUNDERSTORMS MAY IMPACT THE FIRE OR COME CLOSE TO THE
FIRE LOCATION THIS EVENING, BUT CHANCES REMAIN ON THE LOWER SIDE,
LESS THAN 50 PERCENT. WINDS WILL REMAIN VARIABLE AND GENERALLY
LESS THAN 10 MPH. BUT, MAY GUST AND BECOME ERRATIC IN ANY STORM
ACTIVITY. RINSE AND REPEAT FOR WEDNESDAY, WITH REGARDS TO WINDS
AND STORMS. HI- RES GUIDANCE DOES DEPICT PRECIPITATION MOVING OVER
THE FIRE, HOWEVER THE LATEST RADAR SCAN SHOWS THE STORMS SKIRTING
OFF TO THE SOUTH AND EAST, HAVING A HARD TIME MOVING NORTH. IT IS
NOT OUT OF THE REALM OF POSSIBILITY A FEW LIGHTER SHOWERS
REACHING THE FIRE LOCATION. MIN RH VALUES WILL NOT BE OF A CONCERN
AS THEY REMAIN ABOVE 40 PERCENT.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT). CHANCE OF
THUNDERSTORMS EARLY IN THE EVENING. CHANCE OF
SHOWERS EARLY IN THE EVENING.
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 60.
MAX HUMIDITY........67 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 10 MPH SHIFTING TO THE
SOUTHWEST AFTER 3 AM. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS EARLY IN THE
EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 13 TO 21 MPH DECREASING TO 9 TO 10 MPH
OVERNIGHT, THEN SHIFTING TO THE WEST 8 TO 9 MPH
AFTER 3 AM.
SMOKE DISPERSAL.....POOR (3900 KNOT-FT).
HAINES INDEX........MISSING.
TIME (MDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........77 71 71 71 60 60 60 49 49 49
WEATHER COV.....CHC CHC CHC CHC
WEATHER TYPE....RW RW RW RW
TSTM COV........CHC
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............70 68 66 66 65 65 64 63 63 63
RH..............51 55 58 61 63 63 65 67 65 62
20 FT WIND DIR..S S S S S S SW SW SW W
20 FT WIND SPD..9 10 10 10 10 8 7 6 5 5
20 FT WIND GUST.18 20 21 21 20 17 13 10 9 8
MIX HGT (KFT)...0.8 0.6 0.6 0.6 0.6 0.6 0.5 0.6 0.6 0.6
TRANSP WIND DIR.S S SE SE S S S SW SW W
TRANSP WIND SPD.17 18 21 18 16 13 10 9 8 9
HAINES INDEX....M M M M M M M M M M
SDSPL KT-FT/100012 9 10 9 8 6 5 5 4 5
WEDNESDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING MOSTLY
CLOUDY (80-90 PERCENT). CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
CWR.................3 PERCENT INCREASING TO 36 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 74.
MIN HUMIDITY........44 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 7 MPH SHIFTING TO THE NORTHWEST
EARLY IN THE AFTERNOON, THEN BECOMING LIGHT
LATE IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
MIXING HEIGHT.......7000 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 15 MPH SHIFTING TO THE NORTHWEST
EARLY IN THE AFTERNOON, THEN SHIFTING TO THE
SOUTHWEST AROUND 8 MPH EARLY IN THE AFTERNOON
SHIFTING TO THE EAST AROUND 9 MPH LATE IN THE
AFTERNOON SHIFTING TO THE WEST AROUND 12 MPH
SHIFTING TO THE SOUTH AROUND 9 MPH LATE IN THE
AFTERNOON.
SMOKE DISPERSAL.....POOR (4000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (67800 KNOT-FT) IN THE
AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........31 31 31 8 8 8 33 33 33 83 83 83
WEATHER COV..... CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 40 40 40 40 40 40
TEMP............62 65 68 69 73 74 74 72 69 70 66 66
RH..............65 58 55 55 46 44 46 49 57 57 65 65
20 FT WIND DIR..W W W W W NW NW NW NW W W SW
20 FT WIND SPD..5 6 6 7 7 7 7 7 6 5 3 3
20 FT WIND GUST.9 10 12 13 14 14 14 13 10 9 8 7
MIX HGT (KFT)...0.6 0.6 1.4 2.5 4.2 5.7 7.0 5.7 4.8 3.9 3.0 2.3
TRANSP WIND DIR.W W W W W W NW NW SW E W S
TRANSP WIND SPD.8 12 13 15 15 14 10 10 8 9 12 9
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/10004 6 15 32 55 68 63 52 33 31 31 19
FORECASTER...ZAWISLAK
REQUESTED BY...TODD MILLER
TYPE OF REQUEST...WILDFIRE
.TAG 2617923.0/CYS
.DELDT 07/21/26
.FORMATTERVERSION 2.0.0
.EMAIL MILLERLARAMIE@YAHOO.COM,WYCPC@FIRENET.GOV
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