327
FXUS65 KMSO 050858
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
258 AM MDT Thu Jun 5 2025

.DISCUSSION...

KEY MESSAGES:

- Isolated PM showers today, primarily along the divide and
  higher terrain

- Warming and drying trend through early next week

A weak trough of low pressure will remain over the region today,
bringing seasonable temperatures and another period of showers
this afternoon and evening. The best chance for showers will be
across northwest Montana, along the Continental Divide and in
Lemhi County.

High pressure will strengthen and build into the region Friday
into early next week, bringing a significant warm up and generally
dry conditions. Monday looks like the hottest day this week with
many valleys reaching into the low 90s and nearing 100 for the
lower valleys of north central Idaho. Isolated thunderstorms will
be possible across Lemhi County and southwest Montana by Monday
and Tuesday afternoons.

Forecast models continue to show a change in the pattern by late
next week, with around 70 percent of model solutions showing a
trough of low pressure moving into the Pacific northwest by
Friday. This solution would initially favor slightly cooler
temperatures and thunderstorms, but could bring much cooler
temperatures and possibly precipitation by the following weekend.


&&

.AVIATION...A weak disturbance passing through the region in
northerly flow will continue to favor afternoon showers and
isolated thunderstorms, as far west as the Idaho/western Montana
border. These showers may lead to brief MVFR ceilings and
localized reduced visibility. KBTM and KSMN stand the best chance
of seeing a shower through 06/0300z. Winds will generally be
light and terrain driven.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

$$