897
FNUS75 KMSO 202017
FWSMSO
SPOT FORECAST FOR NORTH FORK LOST HORSE
NATIONAL WEATHER SERVICE MISSOULA MT
217 PM MDT THU AUG 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON AUGUST 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
VERY DRY CONDITIONS ARE PRESENT CURRENTLY WITH MIN
RHS IN THE MID TEENS, WITH VERY POOR RECOVERIES OVERNIGHT. BY
EVENING, UNSTABLE AIR FROM THE SOUTHWEST COULD PRODUCE A DRY
THUNDERSTORM, HOWEVER THIS OUTCOME IS VERY LOW PROBABILITY BUT IF
IT DID HAPPEN COULD PRODUCE STRONG OUTFLOW WINDS 25 TO 35 MPH.
SATURDAY THUNDERSTORM CHANCES INCREASE, INITIAL STORMS WILL BE
VERY DRY AND STRONG OUTFLOW WINDS OF 25 TO 35 MPH AND LIGHTNING
ARE THE IMPACTS. THERE IS A 5% CHANCE OR LESS OF A STORM ATTAINING
SEVERE STATUS AND PRODUCING DAMAGING OUTFLOW GUSTS OF 58 MPH OR
GREATER.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....83-88.
* MIN HUMIDITY........14-19 PERCENT.
* WIND (20 FT)........SOUTH AROUND 5 MPH SHIFTING TO THE EAST 5-9
MPH IN THE AFTERNOON.
* MIXING HEIGHT.......2500 FT AGL INCREASING TO 6500 FT AGL.
* MIXING WINDS........SOUTHWEST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MIN TEMPERATURE.....60-65.
* MAX HUMIDITY........30-35 PERCENT.
* WIND (20 FT)........NORTHEAST 7-12 MPH SHIFTING TO THE
SOUTHEAST OVERNIGHT AND DECREASING 5-9 MPH.
* MIXING HEIGHT.......500 FT AGL.
* MIXING WINDS........EAST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* CWR (> 0.10 INCH)...LESS THAN 10 PERCENT.
* CHANCE LIGHTNING....25 PERCENT.
* MAX TEMPERATURE.....79-84.
* MIN HUMIDITY........19-24 PERCENT.
* WIND (20 FT)........SOUTHWEST 6-9 MPH WITH GUSTS TO 20 MPH.
GUSTS FROM THUNDERSTORMS 25 TO 35 MPH.
* MIXING HEIGHT.......2000 FT AGL INCREASING TO 6500 FT AGL LATE IN
THE MORNING.
* MIXING WINDS........SOUTHWEST 10 MPH.
* PRECIP AMOUNT.......0.00-0.02 INCHES.
FORECASTER...BEC
REQUESTED BY...DAVID HOOD
TYPE OF REQUEST...WILDFIRE
.TAG 2619111.15/MSO
.DELDT 08/20/26
.FORMATTERVERSION 2.0.0
.EMAIL CHRIS.MARABETTA@USDA.GOV,2026.NORTHFORKLOSTHORSE.PLANS@FIRENET.GOV,CHRISTOPHER.M.KRAMER@USDA.GOV,CLINT.MENDENHALL@USDA.GOV
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