843
FNUS75 KMSO 201209
FWSMSO
SPOT FORECAST FOR HORN FIRE
NATIONAL WEATHER SERVICE MISSOULA MT
609 AM MDT WED AUG 20 2025
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON AUGUST 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 10 PM
MDT THIS EVENING...
DISCUSSION
ANOTHER WARM, DRY AND UNSTABLE IS EXPECTED FOR THE
FIRE AREA. THE COMBINATION OF WIND AND LOW HUMIDITY WILL CREATE
CRITICAL FIRE WEATHER CONDITIONS. SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO DEVELOP AFTER 1600 MDT NEAR THE FIRE. ANY STORMS WILL
BE CAPABLE OF GUSTY ERRATIC OUTFLOW WINDS. A WEAK DRY COLD FRONT
IS ANTICIPATED TO PUSH THROUGH THE AREA DURING THE OVERNIGHT
HOURS.
TODAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CWR (> 0.10 INCH)...10 PERCENT.
* CHANCE LIGHTNING....15 PERCENT.
* MAX TEMPERATURE.....83-88.
* MIN HUMIDITY........12-17 PERCENT.
* WIND (20 FT)........SOUTH 5-12 MPH SHIFTING TO THE SOUTHWEST 13-18
MPH GUSTS TO 30 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......4000 FT AGL INCREASING TO 13500 FT AGL.
* MIXING WINDS........SOUTHWEST 20 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
TONIGHT
* SKY/WEATHER.........MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. HAZE OVERNIGHT.
* CWR (> 0.10 INCH)...10 PERCENT.
* CHANCE LIGHTNING....15 PERCENT.
* MIN TEMPERATURE.....44-49.
* MAX HUMIDITY........70-75 PERCENT.
* WIND (20 FT)........SOUTH 9-14 MPH SHIFTING TO THE NORTH 3-7
MPH OVERNIGHT.
* MIXING HEIGHT.......10500 FT AGL DECREASING TO 1500 FT AGL.
* MIXING WINDS........NORTHWEST 10 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
THURSDAY
* SKY/WEATHER.........MOSTLY SUNNY. HAZE IN THE MORNING.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....79-84.
* MIN HUMIDITY........12-17 PERCENT.
* WIND (20 FT)........NORTH 3-6 MPH SHIFTING TO THE WEST 5-10 MPH
GUSTS TO 20 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......3500 FT AGL INCREASING TO 11000 FT AGL.
* MIXING WINDS........NORTHWEST 10 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
FORECASTER...SMITH
REQUESTED BY...USFC
TYPE OF REQUEST...WILDFIRE
.TAG 2519876.7/MSO
.DELDT 08/20/25
.FORMATTERVERSION 2.0.0
.EMAIL CWSTULZ@GMAIL.COM,MTDDC@FIRENET.GOV
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