530
FNUS75 KTFX 121321
FWSTFX
SPOT FORECAST FOR MALMSTROM PILE RX...US FWS
NATIONAL WEATHER SERVICE GREAT FALLS MT
721 AM MDT THU MAR 12 2026
FORECAST IS BASED ON IGNITION TIME OF 1800 MDT ON MARCH 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
..HIGH WIND WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING
DISCUSSION
STRONG WEST TO NORTHWEST WINDS GRADUALLY DIMINISH THIS AFTERNOON
INTO THE EVENING AROUND MALMSTROM IN WAKE OF A PACIFIC COLD FRONT.
AS WINDS DIMINISH THIS EVENING PROBABILITIES FOR SNOW INCREASE,
THOUGH THE BEST OPPORTUNITY FOR SNOW HOLDS OFF UNTIL THE FRIDAY
THROUGH SATURDAY TIMEFRAME. EXPECTED SNOWFALL BETWEEN FRIDAY AND
SATURDAY IS IN THE VICINITY OF 6 TO 8 INCHES OR SO.
TONIGHT
SKY/WEATHER.........CLOUDY (95-100 PERCENT). SNOW LIKELY.
CWR.................10 PERCENT INCREASING TO 40 PERCENT OVERNIGHT.
MIN TEMPERATURE.....23-28.
MAX HUMIDITY........79-84 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WINDY. WEST WINDS 25 TO 35 MPH WITH GUSTS TO
50 MPH AT 6PM, DECREASING TO AROUND 10 MPH BY
LATE EVENING.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....WEST AROUND 50 MPH DECREASING TO 10 TO 15 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........97 97 98 98 98 98 98 98 98 98 98 98
WEATHER COV.....CHC CHC CHC CHC LKY CHC LKY LKY LKY LKY LKY LKY
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CWR.............10 10 10 10 10 10 40 40 40 40 40 40
TEMP............40 39 36 35 34 34 32 32 32 31 29 28
RH..............48 49 50 52 55 60 65 67 69 73 73 78
20 FT WIND DIR..WNW WNW NW W W W W W W W W NW
20 FT WIND SPD..35 30 25 20 15 15 10 10 10 10 10 10
20 FT WIND GUST.45 35 30 30 25 20 15 15 15 15 15 15
MIX HGT (KFT)...5.0 3.5 2.5 2.0 1.5 1.0 1.0 1.5 1.5 2.0 1.5 1.0
TRANSP WIND DIR.W W W W W W W W W W W NW
TRANSP WIND SPD.50 35 25 20 15 15 10 15 15 10 10 10
FRIDAY
SKY/WEATHER.........CLOUDY (95-100 PERCENT). SNOW.
CWR.................50 PERCENT DECREASING TO 40 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....29-34.
MIN HUMIDITY........75-80 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS AROUND 10 MPH SHIFTING TO THE
NORTHEAST LATE IN THE AFTERNOON.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH SHIFTING TO THE NORTH IN
THE AFTERNOON.
TIME (MDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........98 98 98 98 98 98
WEATHER COV.....DEFNTE DEFNTE DEFNTE DEFNTE DEFNTE DEFNTE
WEATHER TYPE....SNOW SNOW SNOW SNOW SNOW SNOW
TSTM COV........
CWR.............50 50 50 40 40 40
TEMP............27 26 26 27 29 30
RH..............81 84 87 82 75 75
20 FT WIND......NW 10 NW 10 N 10 N 10 NE 10 NE 10
20 FT WIND GUST.15 15 15 15 15 15
MIX HGT (FT)....1000 1500 1500 1500 2000 1500
TRANSPORT WIND..NW 15 NW 15 NW 15 N 10 N 15 N 15
FRIDAY NIGHT
SKY/WEATHER.........CLOUDY (90-100 PERCENT). SNOW.
CWR.................0 PERCENT INCREASING TO 15 PERCENT OVERNIGHT.
MIN TEMPERATURE.....18-23.
MAX HUMIDITY........93-98 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.
TIME (MDT) 6 PM 9 PM MIDNGT 3 AM
SKY (%).........98 93 94 93
WEATHER COV.....DEFNTE DEFNTE DEFNTE DEFNTE
WEATHER TYPE....SNOW SNOW SNOW SNOW
TSTM COV........
CWR.............0 0 20 20
TEMP............28 24 24 23
RH..............68 86 87 93
20 FT WIND......E 10G15 NE 5G10 NE 5G10 NE 5G10
MIX HGT (FT)....1000 1000 500 500
TRANSPORT WIND..NE 10 NE 10 E 5 NE 5
SATURDAY
SKY/WEATHER.........CLOUDY (90-100 PERCENT). SNOW.
CWR.................60 PERCENT INCREASING TO 70 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....28-33.
MIN HUMIDITY........68-73 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST WINDS AROUND 5 MPH INCREASING TO
NORTH AROUND 15 MPH IN THE AFTERNOON.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH INCREASING TO NORTH 25 TO
30 MPH.
TIME (MDT) 6 AM 10 AM 2 PM
SKY (%).........90 92 97
WEATHER COV.....DEFNTE DEFNTE DEFNTE
WEATHER TYPE....SNOW SNOW SNOW
TSTM COV........
CWR.............60 60 70
TEMP............22 24 28
RH..............96 93 76
20 FT WIND......NE 5G10 N 5G10 N 15G20
MIX HGT (FT)....500 1000 1500
TRANSPORT WIND..NE 5 NE 10 N 20
FORECASTER...MCDOWELL
REQUESTED BY...BELA HARRINGTON
TYPE OF REQUEST...PRESCRIBED
.TAG 2605492.0/TFX
.DELDT 03/12/26
.FORMATTERVERSION 2.0.0
.EMAIL BELA_HARRINGTON@FWS.GOV, TFX.OPS@NOAA.GOV
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