Area Forecast Discussion
Issued by NWS Missoula, MT
FXUS65 KMSO 240952
Area Forecast Discussion
National Weather Service Missoula MT
352 AM MDT Fri Mar 24 2017
.DISCUSSION...Several weather disturbances will periodically move
through the Northern Rockies tonight through much of next week.
There will be some breaks in between systems bringing pleasant
early spring weather with near normal temperatures.
Late today through Saturday morning a weather system with
widespread precip will move through the region. Snow levels of
5000-6000 kft will lower to 4000-5000 kft overnight so expect some
pass level snow. However amounts will be generally light around
1-3". Scattered rain/snow showers will cont Saturday afternoon
then diminish during the evening.
Expect a pretty nice SUNDAY with plenty of sunshine and seasonal
temps in the lower 50s under a weak ridge.
Another shortwave trough will swing through the Northern Rockies
Monday and Tuesday that will bring widespread showers to much of
the region. Not a lot of impacts are anticipated, except for
isolated areas that could see moderate to heavy burst of rain
under the stronger showers and potential thunderstorms. Areas with
poor drainage and very saturated ground could see increased
ponding of water and runoff. Light snow accumulations will be
possible down to 5000 feet Monday morning for areas of north-
central Idaho and southwestern Montana, but not a lot of impacts
due to snow covered roads are expected.
There will be a very short break in widespread precipitation
Wednesday before our next system moves into the region Wednesday
night and Thursday. Models still show a very wet disturbance,
though they differ on whether this will be an open wave or a
closed low pressure system. In either case the wet active pattern
will continue, just how low the snow-levels will be, is the
question at this time.
.AVIATION...The Northern Rockies will see an increase in clouds
this morning and afternoon as our next weather system approaches
today. North-central Idaho will see light to moderate rain showers
first, early this afternoon. While aviation sites KMSO and KGPI
in western Montana should remain dry until after 24/2100Z and KBTM
around midnight tonight. Not a lot of impacts are expected with
these showers, other than brief lowering of ceilings and
visibility in the more moderate rain showers. Southwesterly
breezes of 20-25kts ahead of the showers can be expected for KBTM
and KMSO after 24/1900Z this afternoon.