605
FNUS75 KMSO 140400
FWSMSO

Spot Forecast for Horn Fire
National Weather Service Missoula MT
1000 PM MDT Wed Aug 13 2025

Forecast is based on forecast start time of 2200 MDT on August 13.
If conditions become unrepresentative...contact the National Weather
Service.

...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT THURSDAY...

.DISCUSSION...Mostly clear with patchy smoke and haze. Another
chance for showers and thunderstorms Thursday afternoon and
evening. Low chance for wetting rain unless directly under storm
core. Direct impact from nearby thunderstorm may produce erratic
outflow gusts up to 55 mph. Otherwise expect frequent gusts 20-35
mph in the afternoon. Warm, dry and breezy continuing into Friday.

.REST OF TONIGHT...

* Sky/Weather.........Mostly clear. Patchy smoke/haze overnight.
* CWR (> 0.10 Inch)...0 percent.
* Chance Lightning....0 percent.
* Min Temperature.....44-49.
* Max Humidity........49-54 percent.
* Wind (20 ft)........East 5-10 mph becoming variable 1-5 mph
  after midnight.
* Mixing Height.......Decreasing to less than 1500 ft agl
  overnight.
* Mixing Winds........West 5 mph.
* Precip Amount.......0.00 inches.

.THURSDAY...

* Sky/Weather.........Sunny then becoming partly cloudy. Patchy
  smoke/haze at times. Chance of rain showers and slight chance
  of thunderstorms in the afternoon.
* CWR (> 0.10 Inch)...15 percent.
* Chance Lightning....15 percent.
* Max Temperature.....79-84.
* Min Humidity........12-17 percent.
* Wind (20 ft)........Variable 1-5 mph in the morning becoming
  south-southwest 10-18 mph with gusts up to 35 mph in the
  afternoon. Direct impact from thunderstorm may produce erratic
  outflow gusts up to 55 mph.
* Mixing Height.......Less than 1500 ft agl in the morning
  increasing to 8500 ft agl late in the morning increasing to near
  14000 ft agl late in the afternoon.
* Mixing Winds........Southwest 20 mph.
* Precip Amount.......0.00-0.10 inches.

.THURSDAY NIGHT...

* Sky/Weather.........Partly cloudy. Slight chance of showers and
  thunderstorms in the evening.
* CWR (> 0.10 Inch)...Less than 10 percent.
* Chance Lightning....20 percent.
* Min Temperature.....43-48.
* Max Humidity........53-58 percent.
* Wind (20 ft)........South-southwest 10-18 mph with gusts to 35
  mph in the afternoon. Direct impact from thunderstorm may
  produce erratic outflow gusts up to 55 mph. Becoming variable
  2-6 mph overnight.
* Mixing Height.......Decreasing to near 1500 ft agl overnight.
* Mixing Winds........Southwest 10 mph.
* Precip Amount.......0.00-0.01 inches.

.FRIDAY...

* Sky/Weather.........Mostly sunny. Slight chance shower or
  thunderstorm in the afternoon.
* CWR (> 0.10 Inch)...0 percent.
* Chance Lightning....10 percent.
* Max Temperature.....80-85.
* Min Humidity........9-14 percent.
* Wind (20 ft)........Variable 2-6 mph in the morning increasing
  to southwest 10-15 mph with gusts up to 30 mph in the afternoon.
* Mixing Height.......Near 1500 ft agl in the morning increasing
  to near 14000 ft agl in the afternoon.
* Mixing Winds........Southwest 15 mph.
* Precip Amount.......0.00 inches.

$$
Forecaster...Parker/Smith
Requested by...USFC
Type of request...WILDFIRE
.TAG 2519876.0/MSO
.DELDT 08/13/25
.FormatterVersion 2.0.0
.EMAIL trent.smith@noaa.gov