815
FXUS65 KMSO 081906
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
106 PM MDT Mon Jul 8 2024

.DISCUSSION...A strong ridge of high pressure will continue to
build over the Northern Rockies through mid week. This ridge will
cause extremely warm temperatures with Wednesday being the hottest
day of the week. Temperatures for Wednesday will be approaching
daily record values, especially across north central Idaho.

A subtle disturbance will pass through the region on Thursday
causing the ridge to flatten. This feature will cause temperatures
to cool slightly, around 5 degrees, but afternoon readings will
still be extremely warm for this time of year. The disturbance
will also cause increased westerly winds Thursday afternoon and
evening. The combination of winds and low humidity readings will
be approaching critical fire weather conditions.

The ridge axis nudges to the east Friday into the weekend. This
shift in the ridge will place the Northern Rockies in subtle
southwesterly flow aloft. This flow appears to allow some
monsoonal moisture to make its way up into the region by Saturday
afternoon causing isolated high-based storms over southwest
Montana and Lemhi County.

&&

.AVIATION...VFR conditions the next 24 hours through 09/1200z.




&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Heat Advisory from 1 PM Tuesday to midnight MDT Friday night for
     Flathead/Mission Valleys...Kootenai/Cabinet Region...Lower
     Clark Fork Region...Missoula/Bitterroot Valleys.

ID...Heat Advisory from noon Tuesday to 11 PM PDT Friday for Northern
     Clearwater Mountains.

     Excessive Heat Warning from noon Tuesday to 11 PM PDT Friday for
     Orofino/Grangeville Region...Southern Clearwater Mountains.

     Excessive Heat Warning until 11 PM PDT Friday for Lower Hells
     Canyon/Salmon River Region.

&&

$$