521
FNUS75 KCYS 041826
FWSCYS
SPOT FORECAST FOR SITL TRAINING...NEBRASKA EMERGENCY MANAGEMENT AGENCY
NATIONAL WEATHER SERVICE CHEYENNE WY
1226 PM 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 LOW 90S WITH A MINIMUM RELATIVE HUMIDITY
AROUND 15 PERCENT. WINDS WILL PICK UP THIS AFTERNOON WITH SUSTAINED
SOUTHERLIES AT 10 MPH AND GUSTS UP TO 25 MPH. THIS WILL CREATE NEAR
CRITICAL FIRE WEATHER CONDITIONS ACROSS THE AREA. THERE IS A SLIGHT
CHANCE OF AN ISOLATED SHOWER/STORM THIS AFTERNOON AND EVENING. 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
GOOD, RISING TO ABOUT 90 PERCENT WITH A LOW TEMPERATURE AROUND 55
DEGREES. WINDS WILL REMAIN SIMILAR OVERNIGHT, BUT GRADUALLY CHANGE
DIRECTIONS, BECOMING MORE NORTHERLY BY MORNING. WARM AND DRY TEMPERATURES
ARE ONCE AGAIN FORECAST FOR FRIDAY, WITH A HIGH TEMPERATURE AROUND 85 AND
A MINIMUM RELATIVE HUMIDITY AROUND 20 PERCENT. NORTHERLY WINDS AT 10 MPH
ARE EXPECTED FOR THE FIRST PART OF THE DAY, TURNING MORE EASTERLY BY THE
EVENING.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON.
CWR.................5 PERCENT.
MAX TEMPERATURE.....AROUND 91.
MIN HUMIDITY........15 PERCENT.
WIND (20 FT)........WEST WINDS 6 TO 7 MPH SHIFTING TO THE SOUTH
AROUND 8 MPH LATE IN THE AFTERNOON. GUSTY AND
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS LATE
IN THE AFTERNOON.
MIXING HEIGHT.......13600 FT AGL.
TRANSPORT WINDS.....WEST 13 TO 15 MPH SHIFTING TO THE SOUTHWEST
AROUND 13 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL..... VERY GOOD (104900 KNOT-FT) EARLY IN THE
MORNING INCREASING TO EXCELLENT (170500
KNOT-FT) IN THE AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 1PM 2PM 3PM 4PM 5PM
SKY (%).........4 5 17 49 52
WEATHER COV..... SCH SCH SCH
WEATHER TYPE.... RW RW RW
TSTM COV........ SCH SCH SCH
CWR.............10 10 10 10 10
TEMP............89 90 91 91 90
RH..............17 15 15 16 19
20 FT WIND DIR..W W SW SW S
20 FT WIND SPD..6 7 7 8 8
20 FT WIND GUST.10 13 14 15 16
MIX HGT (KFT)...12 13 14 12 9.5
TRANSP WIND DIR.NW W W W SW
TRANSP WIND SPD.14 15 13 14 13
HAINES INDEX....M M M M M
SDSPL KT-FT/1000146 171 149 148 105
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT).
CWR.................3 PERCENT.
MIN TEMPERATURE.....AROUND 56.
MAX HUMIDITY........93 PERCENT.
WIND (20 FT)........SOUTH WINDS 7 TO 9 MPH SHIFTING TO THE WEST 9
TO 10 MPH AFTER 3 AM.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 13 TO 20 MPH SHIFTING TO THE NORTHWEST 14
TO 17 MPH OVERNIGHT.
SMOKE DISPERSAL.....GOOD (80700 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (6200 KNOT-FT) LATE IN THE
NIGHT.
HAINES INDEX........MISSING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........36 37 59 52 61 47 13 19 10 11 28 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............88 85 79 74 71 70 66 64 61 58 58 56
RH..............20 22 27 33 36 38 42 52 56 72 77 93
20 FT WIND DIR..S S S S S S S SW SW W W NW
20 FT WIND SPD..9 9 8 8 8 8 7 8 8 9 10 10
20 FT WIND GUST.16 16 16 16 15 15 15 15 16 17 18 18
MIX HGT (KFT)...6.7 1.7 0.7 0.5 0.6 0.6 0.6 0.5 0.5 0.5 0.7 1.1
TRANSP WIND DIR.S S S S S S S S W NW N NW
TRANSP WIND SPD.14 13 16 17 20 20 20 18 14 15 16 17
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100081 19 10 8 10 10 10 9 6 7 10 17
FRIDAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT) THEN BECOMING
SUNNY (0-10 PERCENT).
CWR.................1 PERCENT.
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........NORTH WINDS 7 TO 10 MPH SHIFTING TO THE EAST
AROUND 8 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......7900 FT AGL.
TRANSPORT WINDS.....NORTH 9 TO 17 MPH SHIFTING TO THE WEST AROUND
10 MPH LATE IN THE AFTERNOON, THEN SHIFTING TO
THE SOUTHEAST LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (15600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (71000 KNOT-FT) IN THE
AFTERNOON.
HAINES INDEX........MISSING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........59 68 73 56 45 28 5 4 8 6 5 5
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............56 58 63 66 71 75 78 80 83 84 87 87
RH..............93 90 75 65 53 46 39 34 28 25 22 21
20 FT WIND DIR..NW NW N N N NE NE NE NE E E E
20 FT WIND SPD..10 9 9 8 7 7 6 6 7 7 7 8
20 FT WIND GUST.20 18 16 15 13 12 10 10 12 13 14 15
MIX HGT (KFT)...1.1 1.7 2.0 2.3 3.1 4.0 4.7 6.0 6.7 7.5 7.9 7.8
TRANSP WIND DIR.N N N N N N N N NW NW W SE
TRANSP WIND SPD.16 17 17 16 14 12 10 10 10 9 10 10
HAINES INDEX....M M M M M M M M M M M M
SDSPL KT-FT/100016 25 30 32 37 40 43 54 60 60 71 71
FORECASTER...FULLER
REQUESTED BY...THOMAS K. GUILFORD
TYPE OF REQUEST...WILDFIRE
.TAG 2614972.0/CYS
.DELDT 06/04/26
.FORMATTERVERSION 2.0.0
.EMAIL THOMAS.GUILFORD@NEBRASKA.GOV
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