886
FNUS75 KCYS 181514
FWSCYS
SPOT FORECAST FOR SLICKER PILE RX...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
814 AM MST TUE FEB 18 2020
FORECAST IS BASED ON IGNITION TIME OF 0900 MST ON FEBRUARY 18.
IF CONDITIONS BECOME UN-REPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (307) 772-2227, IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST.
DISCUSSION
COLD FRONT LAYS ACROSS NORTHWESTERN SOUTH DAKOTA INTO SOUTHEASTERN MONTANA THIS MORNING. SOUTH OF THIS
FRONT HIGH PRESSURE RESIDES FROM RAWLINS TO CHADRON. WESTERLY WINDS EXPECTED MOST OF THE DAY WITH
PARTLY CLOUDY SKIES THROUGH MID AFTERNOON. FRONT DROPS SOUTH AFTER 1500 THIS AFTERNOON...SHIFTING WINDS
TO THE NORTH AND NORTHEAST.
REST OF TODAY
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................2 PERCENT.
MAX TEMPERATURE.....AROUND 33.
MIN HUMIDITY........45-51 PERCENT.
WIND (20 FT)........WEST WINDS 6 TO 9 MPH SHIFTING TO THE NORTH 7
TO 9 MPH IN THE AFTERNOON. GUSTS UP TO 15 MPH. AFTER 1500...NORTH TO NORTHEAST
WINDS 7 TO 9 MPH.
MIXING HEIGHT.......900 FT AGL INCREASING TO 3500 FT AGL LATE IN
THE MORNING, THEN DECREASING TO 500 FT AGL LATE
IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 12 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (8600-37800 KNOT-FT).
HAINES INDEX........4 LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE
GROWTH.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW THROUGH
THE NIGHT.
CWR.................4 PERCENT.
MIN TEMPERATURE.....AROUND 7 ABOVE.
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 6 TO 8 MPH WITH GUSTS TO AROUND
10 MPH.
MIXING HEIGHT.......500-1600 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 9 MPH.
SMOKE DISPERSAL.....POOR (2800 KNOT-FT).
HAINES INDEX........3 VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
FIRE GROWTH.
WEDNESDAY
SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW THROUGH
THE DAY.
CWR.................4 PERCENT.
MAX TEMPERATURE.....AROUND 23.
MIN HUMIDITY........56-62 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 6 TO 7 MPH WITH GUSTS TO AROUND
10 MPH.
MIXING HEIGHT.......1600-2800 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH.
SMOKE DISPERSAL.....FAIR (15600 KNOT-FT).
HAINES INDEX........3 VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
FIRE GROWTH.
FORECASTER...CLAYCOMB
REQUESTED BY...MICHAEL MATTMILLER
TYPE OF REQUEST...PRESCRIBED
.TAG 2002436.0/CYS
.DELDT 02/18/20
.EMAIL MICHAEL.MATTMILLER@USDA.GOV
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