Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 270951
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
351 AM MDT Thu Apr 27 2017

.DISCUSSION...

Rain and high elevation snow showers will continue to be present
across the Northern Rockies through Friday evening. Minor snow and
slush accumulations over area mountain passes will create brief
hazardous winter driving conditions this morning, and again
tonight through Friday morning. Otherwise, cool late April
conditions will exist across the region.

A window of warmer, dry weather over the Northern Rockies is
anticipated on Saturday, however it is likely to last less than 24
hours and not extend beyond Saturday night.

A disturbance will drop down through the Northern Rockies on
Sunday, bringing widespread showers under cool, northwest flow.
Long range models depict additional scattered showers, and
perhaps an afternoon thunderstorm, will develop both Monday and
Tuesday as the unstable northwest flow continues. However,
precipitation coverage is still uncertain. Perhaps the biggest
change in the forecast appears to be the development of high
pressure beginning Wednesday into Thursday which could trend
toward brief drier and warmer weather before the next system
approaches.

&&

.AVIATION...

Terrain obscurations will be common across Northern Rockies air
space during the next 24 hours. Passing rain showers will lower
ceilings at KGPI through 27/1400Z. For KMSO, KBTM, and KSMN,
showers will likely remain in the vicinity of airfields through
27/1400Z. Showers will redevelop near KGPI and KMSO after
27/1800Z. Wind gusts to 20 knots will be present near KBTM
27/1800Z through 28/0100Z as well.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Winter Weather Advisory until 8 AM MDT this morning West Glacier
     Region.

ID...None.
&&

$$


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