Missoula, Montana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

034
FXUS65 KMSO 300754
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
154 AM MDT Mon Jun 30 2025

.DISCUSSION...


KEY MESSAGES:

- Hot temperatures through Wednesday.

- Thunderstorms return to the region Tuesday and especially Wednesday.

A ridge over the region is causing hot, dry conditions today. The
peak heat of the day in combinations with warm overnight
temperatures only dropping into the 60s has caused us to issue
some heat advisories for portions of central Idaho including
Grangeville and Orofino through Wednesday morning.

The ridge moves eastward on Wednesday setting up southwest flow
into the region. This is a classic thunderstorm pattern for
central Idaho and western Montana. With the recent heat and dry
temperatures, the biggest threat from these storms will be strong
straight line winds. Some of the machine learning and AI models
are also starting show some severe thunderstorm risks for
Wednesday.

Beyond Wednesday a broad trough becomes established over the
region. This will mean more afternoon clouds and cooler
temperatures with highs mostly in the 80s and low 90s. Daily
thunderstorms will also likely affect Lemhi County, ID and
southwest Montana later in the week.



&&

.AVIATION...A ridge over the region will keep VFR conditions over
the region for the next couple of days. Some isolated wildfires
may produce some localized smoke, but none of the regional
terminals are expected to be directly impacted by smoke.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...Heat Advisory from noon today to 9 PM PDT Tuesday for Lower
     Hells Canyon/Salmon River Region...Orofino/Grangeville
     Region.

&&

$$