Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 050951
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
351 AM MDT SAT SEP 5 2015

.DISCUSSION...Rain continues to fall across the Northern Rockies
this morning as a low pressure system circulates just to the west
in Oregon/Washington. As this system moves eastward, rain will
continue across central Idaho and western Montana. That being
said, there is the potential that a brief area of dry air could
shut off rain across west central Montana, including the Missoula
and Bitterroot valleys, through the late morning hours. Should
that occur, we still expect rainfall (steady, moderate at times)
to pick back up in the afternoon and last through the early Sunday
hours. Isolated thunder will also be possible during this time
across most of the Northern Rockies.

Snow is still possible in higher terrain around 6500 feet and
higher during this time period. The winter weather advisory for
western Montana and portions of central Idaho remains in effect
to cover this potential. Those who plan on camping, hiking,
backpacking, or any other type of backcountry travel/recreation
should take extra measures to prepare for rapidly changing, raw,
cold conditions.

Showers will linger in the terrain through Monday, but a general
warming and drying trend will occur through midweek. Another weak
wave of energy may bring a round of showers Wednesday into
Thursday, but confidence is low due to forecast model differences
in timing and intensity.


&&

.AVIATION...Rain showers will affect all terminals throughout the
day today, with isolated areas of lightning popping up through
this evening. Ceilings will gradually lower as rainfall spreads
across central Idaho and western Montana, with rain becoming
moderate to heavy at times. Periodic breaks in rainfall could lead
to partial clearing, but the overall pattern today will be a
cloudy, breezy, rainy one with lowered ceilings being the main
aviation impact to area terminals through at least early Sunday
morning.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...WINTER WEATHER ADVISORY from Noon today to 9 AM MDT Sunday ABOVE
     6500 FEET for the Bitterroot/Sapphire Mountains...
     Butte/Blackfoot Region...Potomac/Seeley Lake Region.

     WINTER WEATHER ADVISORY from Noon today to 9 AM MDT Sunday ABOVE
     6500 FEET for the West Glacier Region.

ID...WINTER WEATHER ADVISORY from Noon today to 9 AM MDT Sunday ABOVE
     6500 FEET for the Eastern Lemhi County...Western Lemhi
     County.

&&

$$


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