109
FXUS65 KMSO 250813
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
213 AM MDT Sat May 25 2024

.DISCUSSION...A deep trough of low pressure approaching the
Northern Rockies will bring widespread rain by this afternoon.
Total precipitation ranges in the western Montana valleys go from
nothing to several hundredths in the lower range, and up to 0.10
to 0.20" in the upper range. The mountains of north-central Idaho
range from 0.10 to 0.50" and the western Montana mountains could
range from a few hundredths up to a couple of tenths. Snow will be
confined mostly to the highest peaks of the Clearwaters,
Bitterroots, Missions, and Swans.

As the trough exits the region Sunday, a drying trend will start,
but it will end up being a breezy afternoon across the region.
The mean wind speeds will range from 10 to 25 mph across western
Montana.

Temperatures will rebound into the 70s and 80s by Monday and
Tuesday. Tuesday will be the warmest day, with daytime high
temperatures hitting 80 degrees for western Montana valleys and
upper 80s for the lower Salmon River valley in Idaho. Along with
daytime heating will come instability. Conditions will be
favorable for afternoon thunderstorms, primarily across north-
central Idaho and southwest Montana.


&&

.AVIATION... A trough of low pressure will bring rain showers to
all terminals today, starting in the southwest and moving
northeast. Some instability this afternoon will bring about a 30
percent chance for thunderstorms to KBTM. Expect westerly wind
gusts to about 20 knots for KGPI this afternoon. Rain showers will
taper off tonight by about 26/0300Z. Precipitation will obscure
terrain across the Northern Rockies airspace today.



&&

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

$$