Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 012145
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
244 PM MST SUN MAR 1 2015

...ARCTIC FRONT MONDAY THROUGH TUESDAY...

.DISCUSSION...Few changes to the short-term forecast from last
night. An arctic front is on the way for Monday afternoon through
Tuesday morning.

Marias pass will be impacted first tomorrow morning, then the snow
and wind will impact the Flathead Valley and Kalispell late in the
morning or early in the afternoon. Kalispell should receive 1-3
inches of new snow with 20-30 mph winds coming out of Bad Rock
canyon. Elsewhere winds with the front will be around 20 mph.

As the front moves south it will impact the I-90 corridor,
Missoula, and the Bitterroot valley with light snow in the
afternoon and more snow and wind in the evening. Expect
difficulties during the evening commute in Missoula and along Hwy
93 with snow and blowing snow. A total of 2-4 inches of new snow
is expected by Tuesday morning in Missoula and much of the
Bitterroot valley. Locally some areas may receive more snow,
especially west of Missoula along I-90 from Alberton through
Tarkio and Superior.

Lolo and Lost Trail passes should get 3-6 inches of new snow with
15-20 mph northeast winds tomorrow evening as the front moves into
Idaho.

Central Idaho will be affected overnight and for the Tuesday
morning commute with snow. Most of the snow in Orofino and
Grangeville, where 1-2 inches of new snow are expected, will come
overnight. However, very cold air and light, powdery snow are
expected early in the morning commute causing very slick roads.
Naturally with these towns being affected by snow, locations such
as Greer Grade and Whitebird Hill will also have difficult travel
due to snow and ice.

Lemhi County, Idaho and the city of Salmon will receive around an
inch of snow with difficult travel conditions expected Tuesday
morning over Gilmore Summit and along Hwy 28 due to snow and
blowing snow.

All areas will have unusually cold temperatures Wednesday morning
potentially causing difficulty for newborn livestock.

A ridge of high pressure will be the dominant feature over the
northern Rockies for the latter part of the week and into the
weekend. The models are still depicting some very weak
disturbances moving over the ridge which could bring isolated to
scattered showers. The timing of the features is still uncertain,
but temperatures do not appear to be as warm as previously
forecasted.


&&

.AVIATION...Increasing clouds tonight ahead of an arctic front for
tomorrow. No significant impacts to aviation overnight expected.
Tomorrow morning snow will impact KGPI as the front moves in.


&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...WINTER WEATHER ADVISORY from 2 PM Monday to 11 AM MST Tuesday
     Bitterroot/Sapphire Mountains...Butte/Blackfoot Region...
     Lower Clark Fork Region...Missoula/Bitterroot Valleys...
     Potomac/Seeley Lake Region.

     WINTER WEATHER ADVISORY from 8 AM Monday to 8 AM MST Tuesday
     Flathead/Mission Valleys...West Glacier Region.

     WINTER WEATHER ADVISORY from 8 AM Monday to 8 AM MST Tuesday
     Kootenai/Cabinet Region.

ID...&&

$$



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