328
FNUS75 KTFX 040001
FWSTFX
SPOT FORECAST FOR BLACK DIAMOND...USFS
NATIONAL WEATHER SERVICE GREAT FALLS MT
601 PM MDT SUN MAY 3 2026
FORECAST IS BASED ON IGNITION TIME OF 2000 MDT ON MAY 03.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A COLD FRONT WILL MOVE SOUTH AND ACROSS THE INCIDENT AREA DURING
THE OVERNIGHT HOURS TONIGHT, GENERALLY BETWEEN THE HOURS OF 0000
AND 0400 LOCAL TIME. THIS FRONT WILL BRING A WIND SHIFT TO THE
NORTHWEST AND NORTHEAST, ALONG WITH A PERIOD OF GUSTY WINDS. WHILE
WIND GUSTS UP TO 20 MPH ARE EXPECTED WITH THE PASSAGE OF THE COLD
FRONT THERE IS A 35% CHANCE THAT GUSTS COULD EXCEED 25 MPH. LIGHT
RAIN IS ALSO EXPECTED TO ACCOMPANY THE COLD FRONT, WITH
PRECIPITATION CHANCES LINGERING THROUGH MOST OF THE DAY ON MONDAY.
AT THIS TIME PRECIPITATION AMOUNTS WILL BE LIGHT, WITH A 5%
CHANCE THAT AMOUNTS EXCEED 0.05".
REST OF TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT). SLIGHT CHANCE OF
RAIN OVERNIGHT.
CWR.................5 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
MIN TEMPERATURE.....36-41.
MAX HUMIDITY........86-91 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH SHIFTING TO THE
NORTHEAST OVERNIGHT. WIND GUSTS UP TO 20 MPH BETWEEN
0000 TO 0400 LOCAL TIME.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH SHIFTING TO THE
NORTHEAST 15 TO 20 MPH OVERNIGHT.
TIME (MDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........9 6 13 20 27 40 49 55 53 59
WEATHER COV..... SCH SCH SCH SCH
WEATHER TYPE.... RN RN RN RN
TSTM COV........
CWR.............0 0 0 0 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0
TEMP............61 55 52 50 48 46 45 43 42 41
RH..............30 39 45 48 55 57 61 67 71 76
20 FT WIND DIR..W W W NW NW N NE NE NE NE
20 FT WIND SPD..5 5 5 5 10 10 10 10 10 10
20 FT WIND GUST.10 10 10 10 15 15 15 15
MIX HGT (KFT)...1.5 0.5 0.1 0.1 0.5 1.0 1.0 1.5 1.5 1.5
TRANSP WIND DIR.W W NW W N NE NE NE NE NE
TRANSP WIND SPD.10 10 10 10 10 15 15 20 20 15
MONDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
MOSTLY SUNNY (45-55 PERCENT). CHANCE OF SNOW IN
THE MORNING. CHANCE OF RAIN THROUGH THE DAY.
CWR.................5 PERCENT.
CHANCE OF THUNDER...5 PERCENT.
MAX TEMPERATURE.....49-54.
MIN HUMIDITY........33-38 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......5000 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH DECREASING TO 10 TO 15
MPH IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........69 79 83 88 84 89 90 82 67 60 53 48
WEATHER COV.....CHC SCH CHC CHC CHC SCH SCH CHC SCH SCH SCH SCH
WEATHER TYPE....RN RN RS RS RS RS RN RN RN RN RN RN
TSTM COV........
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 10 10 10 0 0 0
TEMP............40 39 38 41 42 43 44 46 48 49 49 50
RH..............81 81 81 66 64 60 56 52 46 43 41 39
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE NE NE NE
20 FT WIND SPD..10 10 5 5 5 5 5 5 10 10 10 10
20 FT WIND GUST.15 15 15 15 15 15 15 15 15 20 20 20
MIX HGT (KFT)...2.0 2.5 2.5 2.5 3.0 3.0 3.5 4.5 5.0 5.0 5.0 5.0
TRANSP WIND DIR.NE NE NE NE NE NE NE NE NE N N N
TRANSP WIND SPD.20 15 15 15 15 15 15 10 10 10 10 15
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (45-55 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT).
CWR.................5 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MIN TEMPERATURE.....29-34.
MAX HUMIDITY........53-58 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......NORTHEAST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........52 52 52 52 52 52 36 36 36 25 25 25
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............51 49 46 44 42 41 39 37 35 33 32 31
RH..............39 39 43 48 50 50 50 51 52 53 55 58
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE NE NE NE
20 FT WIND SPD..10 10 10 10 10 10 5 5 5 5 5 5
20 FT WIND GUST.15 15 15 15 15 15 15 15 15 10 10 10
MIX HGT (KFT)...5.0 3.5 3.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.5 0.5
TRANSP WIND DIR.N NE NE NE NE NE NE NE NE NE NE NE
TRANSP WIND SPD.15 15 15 10 10 10 10 10 10 10 10 10
FORECASTER...MOLDAN
REQUESTED BY...JAREL KURTZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2612468.2/TFX
.DELDT 05/03/26
.FORMATTERVERSION 2.0.0
.EMAIL JAREL.KURTZ@USDA.GOV, TFX.OPS@NOAA.GOV
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