Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 192124
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
224 PM MST Mon Feb 19 2018

...BITTERLY COLD TONIGHT...

.DISCUSSION...Snow showers are winding down across central Idaho
today, with very light snow expected to continue through this
evening.

Last night was very cold with some locations in western Montana
reaching 20 to 35 below zero! Tonight is expected to be another
cold one, with many locations dropping below zero in western
Montana and into the single digits in central Idaho. Normally in
this situation the actual low temperatures will depend heavily on
how much cloud cover remains over the area. Models indicate mostly
dry air aloft, but not the excessively dry air that makes it a
sure thing. And today`s satellite imagery is showing the
development of some low clouds in area valleys. By the numbers it
is a very difficult forecast, but whether it`s 10, 20, or 30
degrees below zero, it is going to be very cold.

A light northerly or northwesterly flow will remain over the
Northern Rockies through the end of the week. Temperatures will
remain quite cold, though will slowly warm from day to day, with
highs across the region reaching the upper 20s to low 30s by
Friday. Typically under this type of pattern, light snow showers
will develop each day, but will not accumulate much, if they do
develop.

Long range forecast models remain in good agreement with another
active pattern developing over the Northern Rockies by this
weekend, and likely persisting into the first part of next week.
Most locations will likely remain cold enough for snow, however, it`s
too early to tell where the heavier precipitation develops.
Though, widespread snow accumulations look likely for the
mountains and valleys.


&&

.AVIATION...Some low and mid level clouds are hanging around and
may cause some very light snow showers, especially around the
mountains. Thin stratus is the most likely restriction to from at
any terminals tonight. The main regional terminals including KGPI,
KMSO, and KBTM are expected to be below zero tonight, with KBTM
being colder than 20 below zero.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

$$



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