Area Forecast Discussion
Issued by NWS Missoula, MT

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FXUS65 KMSO 022021

Area Forecast Discussion
National Weather Service Missoula MT
121 PM MST Sat Mar 2 2024

.DISCUSSION...We have a potent storm system across the entire
west this afternoon. A large upper low exists across western
Canada down to the desert southwest and California. The main jet
around 130-150 knots is moving across California where blizzard
conditions are resulting in feet of snow.

Back home in Idaho/Montana, pulses of energy or surface low
pressure systems are developing and spinning northward across the
Northern Rockies. A couple of lines of strong showers produced
snow/graupel across the Flathead down to the Bitterroot however
with little impacts this afternoon with warmer road temps.

Meanwhile closer to the surface low itself several inches of snow
has fallen across Lookout pass into Northwest Montana. This has
resulted in some difficult travel this afternoon.

The large upper trough over the west will continue through
much of next week. Cold and unstable conditions with snow showers
and gusty outflow winds will persist across the NR. A couple of
surface lows may break off each afternoon and spin up across the
NR to bring a more organized (or line) of snow showers with gusty
westerly winds to around 40 mph.

Overnight temperatures will become quite cold Saturday through
much of next week thanks to some arctic air moving into central
Montana. Some of this arctic air will spill across the divide
resulting in pretty cold temperatures. Single digits across
southwest Montana and Lemhi county will occur with overnight lows
in the teens elsewhere.


.AVIATION...A weak arctic air mass will bring easterly winds at
KGPI. All terminals can expect vicinity snow showers through
03/2300z. Quickly reduced visibilities, low ceilings and mountain
obscurations will occur with showers.


MT...Winter Weather Advisory until 5 PM MST this afternoon for
     Kootenai/Cabinet Region...Lower Clark Fork Region.

     Winter Weather Advisory until 5 AM MST Sunday for
     Bitterroot/Sapphire Mountains...Potomac/Seeley Lake
     Region...West Glacier Region.

ID...Winter Weather Advisory until 10 PM PST this evening for
     Northern Clearwater Mountains...Southern Clearwater

     Winter Weather Advisory until 5 PM MST this afternoon for
     Eastern Lemhi County...Western Lemhi County.


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