646
FNUS75 KMSO 212135
FWSMSO
SPOT FORECAST FOR NORTH FORK LOST HORSE
NATIONAL WEATHER SERVICE MISSOULA MT
335 PM MDT FRI AUG 21 2026
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON AUGUST 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SATURDAY
MOSTLY CLOUDY CONDITIONS ARE EXPECTED IN THE MORNING,
WITH A 20 PERCENT PROBABILITY FOR LIGHT RAINS SHOWERS BETWEEN
0500-0800. THESE SHOWERS WILL BE MORE LIKE SPRINKLES, NOT WETTING
RAINS. LIGHT SOUTHERLY WINDS IN THE MORNING WILL BECOME WESTERLY
9-12 MPH, WITH GUSTS UP TO 25 MPH. DURING THE AFTERNOON THERE WILL
BE A 25 PERCENT PROBABILITY FOR MOSTLY DRY THUNDERSTORMS BETWEEN
1500 AND 2000. CHANCES FOR WETTING RAINS ARE VERY LOW, UNLESS THE
CORE OF THE THUNDERSTORMS ARE DIRECTLY OVERHEAD. GUSTY AND ERRATIC
WINDS AROUND 30 MPH ARE POSSIBLE WITH THE THUNDERSTORMS. A DRY
COLD FRONT WILL MOVE THROUGH THE AREA SUNDAY, WITH THE FRONTAL
PASSAGE LATE MORNING TO EARLY AFTERNOON 1000-1300.
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS IN THE
MORNING AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CWR (> 0.10 INCH)...LESS THAN 10 PERCENT.
* CHANCE LIGHTNING....25 PERCENT.
* MAX TEMPERATURE.....81-86.
* MIN HUMIDITY........20-25 PERCENT.
* WIND (20 FT)........SOUTH-SOUTHWEST 6-8 MPH SHIFTING TO THE WEST
9-12 MPH IN THE AFTERNOON, WITH GUSTS 20-25 MPH.
* MIXING HEIGHT.......3000 FT AGL INCREASING TO 7500 FT AGL IN THE
AFTERNOON.
* MIXING WINDS........SOUTHWEST 15 MPH.
* PRECIP AMOUNT.......0.01 INCHES.
SATURDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY. CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING, THEN SLIGHT CHANCE
OF RAIN OVERNIGHT.
* CWR (> 0.10 INCH)...10 PERCENT.
* CHANCE LIGHTNING....25 PERCENT.
* MIN TEMPERATURE.....48-53.
* MAX HUMIDITY........52-57 PERCENT.
* WIND (20 FT)........SOUTH AROUND 7 MPH SHIFTING TO THE SOUTHWEST
9-10 MPH OVERNIGHT.
* MIXING HEIGHT.......500 FT AGL.
* MIXING WINDS........SOUTHWEST 10 MPH.
* PRECIP AMOUNT.......0.03 INCHES.
SUNDAY
* SKY/WEATHER.........MOSTLY SUNNY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....73-78.
* MIN HUMIDITY........26-31 PERCENT.
* WIND (20 FT)........WEST 12-18 MPH. GUSTS 30-35 MPH IN THE
AFTERNOON.
* MIXING HEIGHT.......2500 FT AGL INCREASING TO 8000 FT AGL.
* MIXING WINDS........SOUTHWEST 15 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
FORECASTER...ROBINSON
REQUESTED BY...DAVID HOOD
TYPE OF REQUEST...WILDFIRE
.TAG 2619111.16/MSO
.DELDT 08/21/26
.FORMATTERVERSION 2.0.0
.EMAIL CHRIS.MARABETTA@USDA.GOV,2026.NORTHFORKLOSTHORSE.PLANS@FIRENET.GOV,CLINT.MENDENHALL@USDA.GOV,CHRISTOPHER.M.KRAMER@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page