Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 232049

Area Forecast Discussion
National Weather Service Missoula MT
249 PM MDT Tue Apr 23 2019


Periodic rain showers will continue to be present across the
Northern Rockies through this evening. Rainfall accumulations of
up to a few hundredths of an inch are possible with these
showers. Otherwise, cloudy skies will keep temperatures down just
a bit over Monday.

A few showers will linger over southwest Montana and north
central Idaho through Wednesday morning, however the remainder of
Wednesday will see warming and drying conditions across the
Northern Rockies. Daytime temperatures will warm quite a bit
Thursday, with low elevations of Idaho pushing 80 degrees.

The late week warmth for the Northern Rockies will be short-lived,
with a return to rain showers on Friday and a significant cold
storm system arriving Saturday. The Glacier Park Region appears to
be ground zero for the cold air, with snow levels briefly below
3000 feet late Saturday night through Sunday morning. Light snow
accumulations could be present near Essex to Marias Pass Saturday
night (and possibly Sunday night, too), creating instances of
hazardous winter driving conditions in low visibility and slick
roadways. Elsewhere across the region, rain/snow showers will be
present throughout this weekend, with afternoon temperatures
struggle to reach 50 degrees for many areas above 2500 feet. North
central Idaho and Lemhi County will remain slightly warmer, as the
cold air will be concentrated over northwest Montana.

Models are in agreement that the weekend cold snap is likely to
extend through at least the middle of next week, accompanied by
occasional high-elevation snow and cold valley rain showers. There
is a possibility of a warm ridge of high pressure late next
week, but there is low pattern agreement among global models.



Rain showers will continue to be present across the Northern
Rockies air space through 24/1800Z, obscuring terrain mainly down
to 5000 feet MSL. KMSO is the most likely terminal to be impacted
by a rain shower, however there will be minimal change to
visibility and ceiling overhead. Otherwise, wind gusts to 25 knots
will be present at KGPI and KBTM through 25/0300Z. Wind gusts to
25 knots may return to KGPI and KBTM after 25/1800Z. Otherwise,
skies are anticipated to clear across the region on Wednesday



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