Area Forecast Discussion
Issued by NWS Missoula, MT

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

FXUS65 KMSO 220929

Area Forecast Discussion
National Weather Service Missoula MT
329 AM MDT WED OCT 22 2014

.DISCUSSION...High pressure has moved into Idaho and western
Montana overnight and helped cloud cover to decrease and fog to
form in many areas. The mix of low clouds and fog will last into
mid morning.

The next trough is moving onto the west coast with cloud cover
spreading ahead of it. This cloud cover will keep high
temperatures from reaching their full potential today, though,
near to just above normal temperatures can be expected.
Precipitation with the next weather system is forecast to move
into far northwest Montana this evening followed by the rest of
northwest Montana and north central Idaho overnight. The strong
upper jet with this trough could still produce a few thunderstorms
late Thursday so the chance remains in the forecast. Gusty
westerly winds should also be anticipated for Thursday afternoon
and evening. Precipitation will linger through Friday.

Model guidance now agree that weak ridge will build back into
Idaho and western Montana Saturday morning ahead of another
trough, so one change to the extended forecast has been to dry
the forecast for Friday night. This next trough will pass on
Sunday and Monday with cool and showery conditions.

Weak high pressure may build for Tuesday before another possible
trough on Wednesday.


.AVIATION...Clouds are on a general decreasing trend through the
region this morning as weak high pressure passes over Idaho and
western Montana. The exception to clearing skies is that low level
moisture, left from yesterday`s rain, has caused fog and stratus
to build. A mix of fog and stratus will last through mid morning.
Cloud cover ahead of an approaching trough is already moving into
Washington and will pass through the region with lowering cloud
bases through today. Downslope winds are still expected along the
Rocky Mountain Front of Glacier National Park so watch out for
mountain wave activity. Obscured terrain and precipitation will
spread through northwest Montana and north central Idaho overnight



$$ is the U.S. government's official web portal to all federal, state and local government web resources and services.