Area Forecast Discussion
Issued by NWS Missoula, MT
FXUS65 KMSO 042127
Area Forecast Discussion
National Weather Service Missoula MT
227 PM MST Wed Dec 4 2013
...DANGEROUS WIND CHILLS FRIDAY INTO SATURDAY...
.DISCUSSION...This morning was pretty cold through the region, but
tonight is going to be the first very cold night in many years. Low
temperatures tonight are expected to reach values that we have not
seen since 2009. Missoula has not seen a below zero temperature in
1012 days but tonight is going to break that streak with a below
zero temperature very likely. The cold morning on Thursday will
have a big affect on afternoon temperatures with most highs to
only reach the single digits at best. These cold temperatures will
have us primed for a widespread and dangerous wind chill setup for
late Thursday through Saturday morning. Another arctic cold front
will pass late Thursday through Saturday and will bring breezy
conditions and a reinforcement of cold air. The combination of
wind and cold will result in wind chills of 20 to 30 degrees below
zero or colder. Wind chills of these readings can cause frostbite
to exposed skin in as little as 10 minutes, so please be prepared
if planning to travel, be outdoors, or have pets in the elements.
Moisture is going to increase with the upper level trough passage
on Friday. Most of the region is going to be so cold that a snow
growth region will not exist, so most people will only see very
light snow and cloud cover. North central Idaho is the only
location with a chance for accumulations since there will be a
snow growth temperature profile near the ground. The Camas Prairie
is included in the snow chances but at this time the snow does not
look to present a big impact.
The cold weather pattern will maintain over the Northern Rockies
through this weekend and into next week. There are indications in
extended model guidance for the upper level flow to transition
into an active northwesterly flow. This flow pattern could open
the door for more moisture and snow chances as we move through
.AVIATION...The very cold trough will maintain its presence
through the northern Rockies and much of the western United
States. Cloud cover still exists in parts of north central Idaho
and western Montana that are obscuring terrain at times. A period
of mostly clear skies are expected tonight but cloud cover will
increase through Thursday.
MT...WIND CHILL WATCH from Thursday afternoon through Saturday
morning Bitterroot/Sapphire Mountains...Butte/Blackfoot
Region...Lower Clark Fork Region...Missoula/Bitterroot
Valleys...Potomac/Seeley Lake Region...West Glacier Region.
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