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fxus65 kmso 271029 

Area forecast discussion
National Weather Service Missoula Montana
429 am MDT Mon Mar 27 2017


Low elevation rain and high elevation snow showers will be present
at times across the northern rockies through tonight. Snow
accumulations are not anticipated much on area roadways, including
upon mountain passes. Consistent with previous forecasts, north
central Idaho has the best chance of liquid equivalent
precipitation over one quarter inch.

Most location across the northern rockies will have a respite from
precipitation Monday night through Tuesday with the exception of
far northwest Montana. Even so, precipitation amounts for
northwest Montana will be quite light. On Wednesday, a more
significant storm system will impact the northern rockies,
reducing snow levels Wednesday evening.

The next weather system of concern will be moving in Wednesday
evening into Thursday. A trough of low pressure will bring
widespread precipitation across central Idaho, southwest Montana,
and Lemhi County. Areas of central Idaho will see the greatest
precipitation with 0.50 inches to 1.00 inches of moisture
possible. Snow levels will be generally around 5000 feet thus most
valleys will see rain with this system. Higher elevation valleys
of southwest Montana and Idaho could see periods of moderate snow
especially around Georgetown Lake. Mountain passes such as lost
trail and Gilmore Summit could see periods of moderate to heavy
snow, which could cause hazardous Road conditions at times on
Thursday. This weather system will moving out of our region on
Friday and we could see a day or two of dry weather before our
next weather system moves in.


Aviation...some very weak rain showers have persisted near
northern rockies terminals overnight, however more substantial
widespread precipitation will occur mainly after 27/1400z. The
precipitation may decrease visibility/ceilings and be mixed
briefly with snow (ksmn, kbtm) through 27/2000z. Terrain
obscurations will be common across the region during the next 24


Mso watches/warnings/advisories...

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