178
FNUS75 KMSO 201835
FWSMSO
SPOT FORECAST FOR CHERRY PEAK FIRE
NATIONAL WEATHER SERVICE MISSOULA MT
1235 PM MDT THU AUG 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON AUGUST 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
HAZY, WARM, AND DRY CONDITIONS WERE PRESENT WITH
TEMPERATURES NEAR 75F AND MIN RH 20%. WINDS WERE LIGHT OUT OF THE
SOUTHWEST.
HIGH PRESSURE WILL CONTINUE TO BRING WARM AND DRY CONDITIONS
THROUGH THE FORECAST PERIOD. THERMAL BELTS WILL ALSO DEVELOP
PRODUCING POOR RH RECOVERY DURING THURSDAY NIGHT. RH RECOVERY ON
FRIDAY NIGHT MAY BE SLIGHTLY BETTER THAN THURSDAY NIGHT, BUT
REMAIN POOR TO MODERATE RECOVERY ONLY. TERRAIN DRIVEN DOWN-SLOPE
WINDS MAY DEVELOP FRIDAY NIGHT.
A COLD FRONT ON SATURDAY WILL ALLOW FOR RIDGE BREAKDOWN WITH
WINDS INCREASING THROUGH THE WEEKEND. HIGH BASED SHOWERS MAY
DEVELOP FROM FRIDAY NIGHT INTO SATURDAY MORNING, WITH RISK OF DRY
THUNDERSTORM FROM SATURDAY AFTERNOON. WIND GUSTS UP TO 30-35 MPH
POSSIBLE ASSOCIATED WITH SHOWERS/THUNDERSTORM OUTFLOW. THROUGHOUT
THIS FORECAST PERIOD, LOW LEVEL ATMOSPHERE REMAIN QUITE DRY AND
WETTING RAIN IS UNLIKELY.
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY.
* CWR (> 0.10 INCH)...0 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....77-82.
* MIN HUMIDITY........17-22 PERCENT.
* WIND (20 FT)........VARIABLE 2-5 MPH SHIFTING TO THE EAST 5-7
MPH GUSTS TO 10 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......500 FT AGL IN THE EARLY MORNING INCREASING
TO 7200 FT AGL IN THE AFTERNOON.
* MIXING WINDS........SOUTHEAST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT (<10%) CHANCE OF HIGH
BASED SHOWERS OVERNIGHT, MORE LIKELY AFTER MID NIGHT.
* CWR (> 0.10 INCH)...10 PERCENT.
* CHANCE LIGHTNING....UP TO 10 PERCENT.
* MIN TEMPERATURE.....61-66.
* MAX HUMIDITY........43-48 PERCENT.
* WIND (20 FT)........EAST 2- 5 MPH.
* MIXING HEIGHT.......7000 FT AGL DECREASING TO 500 FT AGL.
* MIXING WINDS........EAST 5 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
SATURDAY
* SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF HIGH BASED
SHOWERS. SLIGHT CHANCE OF DRY THUNDERSTORM IN THE AFTERNOON.
* CWR (> 0.10 INCH)...10 PERCENT.
* CHANCE LIGHTNING....15 PERCENT.
* MAX TEMPERATURE.....74-79.
* MIN HUMIDITY........27-32 PERCENT.
* WIND (20 FT)........EAST AROUND 5 MPH SHIFTING TO THE SOUTHWEST
5-8 MPH GUSTS TO 15-20 MPH IN THE AFTERNOON.
* MIXING HEIGHT.......500 FT AGL IN THE EARLY MORNING INCREASING
TO 8500 FT AGL IN THE AFTERNOON.
* MIXING WINDS........SOUTH 10 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
FORECASTER...BEC/JUNSMITHBOM
REQUESTED BY...BRITTENY ALLESTEAD
TYPE OF REQUEST...WILDFIRE
.TAG 2619977.3/MSO
.DELDT 08/20/26
.FORMATTERVERSION 2.0.0
.EMAIL 2026.CHERRYPEAK.PLANS@FIRENET.GOV,WADE.BACHE@USDA.GOV,MTMDC@FIRENET.GOV,TREVOR.UNSWORTH@USDA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page