408
FNUS75 KMSO 202317
FWSMSO

Spot Forecast for Moose Fire PM
National Weather Service Missoula MT
517 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...High pressure will maintain hot and dry conditions
with poor RH recoveries on midslopes and ridges. Today will trend
several degrees warmer with similar RHs to Thursday. The high
pressure ridge begins to weaken tonight with increasing moisture
from the south. Northeasterly winds this evening will shift to
southeasterly early Saturday morning. Clouds will keep
temperatures cooler and RHs higher on Saturday but the threat for
thunderstorms increases by Saturday afternoon. While measurable
precipitation is anticipated with storms, the biggest threat will
be for gusty and erratic outflow winds.

.FRIDAY...

* Sky/Weather.........Mostly sunny becoming partly cloudy in the
  afternoon.
* CWR (> 0.10 Inch)...0 percent.
* Chance Lightning....Up to 10 percent.
* Max Temperature.....82-87.
* Min Humidity........16-21 percent.
* Wind (20 ft)........Upslope/upvalley 3-5 mph becoming west 5-8
  mph in the afternoon.
* Mixing Height.......2000 ft agl increasing to 8500 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.....58-63.
* Max Humidity........35-40 percent.
* Wind (20 ft)........Northeast 5-8 mph in the evening shifting
  to the southeast 5-7 mph overnight.
* Mixing Height.......3500 ft agl decreasing to 500 ft agl early in
  the evening.
* Mixing Winds........East 10 mph.
* Precip Amount.......0.00 inches.

.SATURDAY...

* Sky/Weather.........Mostly cloudy. Slight chance of showers or a
  thunderstorm in the morning, then showers likely and chance of
  thunderstorms in the afternoon.
* CWR (> 0.10 Inch)...Less than 10 percent.
* Chance Lightning....30 percent.
* Max Temperature.....75-80.
* Min Humidity........22-27 percent.
* Wind (20 ft)........South 5-7 mph shifting to the southwest 7-10
  mph with gusts to 15 mph in the afternoon.
* Mixing Height.......2000 ft agl increasing to 7000 ft agl.
* Mixing Winds........Southwest 15 mph.
* Precip Amount.......0.01 inches.

$$
Forecaster...JennK
Requested by...Donavan Albert
Type of request...WILDFIRE
.TAG 2619413.10/MSO
.DELDT 08/20/26
.FormatterVersion 2.0.0
.EMAIL donavan_albert@firenet.gov,2026.moose.plans@firenet.gov