Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 240951
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
351 AM MDT Wed May 24 2017

...Strong winds expected across western Montana today...

.DISCUSSION...A strong cold front is moving through western
Montana and central Idaho early this morning, causing breezy
winds to occur. Wind gusts to 30 mph have already become common.
Wind speeds are expected to increase through the morning as the
atmosphere continues to destabilize, with widespread gusts over 40
mph likely, mainly in western Montana. Southwest Montana could see
a period of gusts nearing 50 mph this afternoon, mainly in the
vicinity of Avon, Ovando and MacDonald Pass. Damage to trees and
some power outages are possible. Travel for high profile vehicles
may be difficult at times due to crosswinds. In addition,
choppy conditions are likely on area lakes, particularly Flathead
Lake, which could cause hazardous conditions for small water
craft. Winds will begin to diminish late this afternoon, except
across southwest Montana and Lemhi County in Idaho, where winds
may linger a bit longer.

Cooler conditions with afternoon showers and thunderstorms can be
expected for Thursday and Friday.

No changes to the forecast for Memorial Day weekend. We are still
on track with a warming trend through early next week. In terms of
precipitation, there could be scattered showers and maybe a
thunderstorm along the Continental Divide and portions of
southwest Montana Saturday afternoon. Showers with an isolated
thunderstorm are possible from the Whitefish Range to Glacier
National Park on Sunday. For Memorial Day showers and maybe a
thunderstorm could be possible mainly over the mountains along the
Divide and perhaps over the southern Clearwater mountains.

&&

.AVIATION...A strong cold front is moving through western Montana
and central Idaho this morning with a rough position from KGPI to
KMSO to KSNT as of 09z. Winds sustained at 15-20kts with gusts up
to 30kts can be expected as the front continues to move eastward.
KBTM and KSMN can expect the front between roughly 24/1000z and
24/1300z. Behind the front, winds will continue to increase
through the morning as the atmosphere continues to destabilize. By
roughly 24/1800z, all airfields can anticipate wind gusts reaching
as high as 40kts. Winds will likely begin to weaken around KGPI
and KMSO around 25/0000z, but KBTM and KSMN will likely hang on to
the winds through roughly 25/0300z. Mid level clouds will be on
the increase this afternoon across mainly northwest Montana, with
the potential for some shower activity.


&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Wind Advisory from 9 AM this morning to 9 PM MDT this evening
     Butte/Blackfoot Region.

     Wind Advisory from 9 AM this morning to 9 PM MDT this evening
     Bitterroot/Sapphire Mountains...Missoula/Bitterroot
     Valleys...Potomac/Seeley Lake Region.

     Wind Advisory from 9 AM this morning to 9 PM MDT this evening
     Kootenai/Cabinet Region...Lower Clark Fork Region.

     Wind Advisory from 9 AM this morning to 9 PM MDT this evening
     Flathead/Mission Valleys...West Glacier Region.

ID...Wind Advisory from 9 AM this morning to 9 PM MDT this evening
     Eastern Lemhi County.

&&

$$


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