Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

Area forecast discussion 
National Weather Service Missoula Montana
954 am MDT Friday Mar 27 2015

Update...added several locations across western Montana to a Wind
Advisory for Saturday.

&&

Discussion...there is high confidence that strong, gusty winds
will occur through the day Saturday and could impact several user
groups. Those with plans to be out boating on Flathead Lake will
encounter rough waters due to gusty winds, and those with outdoor
plans across southwest and portions of west central Montana will
also see persistent strong winds, beginning as early as Saturday
morning. High profile vehicles could encounter difficult driving,
especially from Drummond to Butte along Interstate 90. Gusts of 40
to 50 mph are possible in all aforementioned locations.

&&

Aviation...

Fog has developed in northwest Montana including kgpi. Patchy fog
is also possible in north central Idaho and west central Montana
valleys which will last until around mid morning. High pressure
will build over Idaho and western Montana today so after fog lifts
and dissipates, conditions will be rather nice. The next weather
system will quickly move into the region late today with showers
and even thunderstorms possible in Idaho as early as this evening.
Showers and isolated thunderstorms will move into western Montana
overnight, followed by a cold front Saturday morning that will
bring gusty winds.

&&

Previous discussion... /issued 336 am MDT Friday Mar 27 2015/

.Isolated thunderstorms tonight and gusty winds and showers
Saturday...

Discussion...fog and low cloud cover has developed through
portions of northwest Montana which model guidance agree will lift
and dissipate beginning mid morning. Other than some passing
clouds early today conditions look to be very nice for this time
of year. High temperatures are still anticipated to reach near
record values.

The next weather system currently just off the West Coast is
still forecast to quickly move into the Pacific northwest late
today. There is plenty of support for showers with possibly
lightning to develop late this evening in north central Idaho that
will expand into western Montana overnight. The trough and cold
front will pass during Saturday morning and will be associated with
rain and increased winds. By the afternoon, showers will decrease
and winds will increase. Most locations will have gusty winds but
along The Divide and I-90 corridor have the potential to be quite
gusty with widespread gusts 30-40 mph and even stronger between
Deer Lodge and Butte. Winds are expected to decrease during the
evening as the trough continues off to the east.

A few showers will develop on Sunday otherwise temperatures are
going to be just below normal.

Monday will be another nice Spring day before a moist westerly
flow pattern sets up for next week. A cold front is still expected
to pass through the region on Tuesday. Gusty winds, high chances
for precipitation, and lowering snow levels are all expected as
the front passes. Snow levels will lower enough that at least
mountain passes could see light snow accumulation. The active
weather pattern next week will keep temperatures below average and
increased chances for precipitation.

&&

Mso watches/warnings/advisories...
Montana...Wind Advisory from 9 am to 9 PM MDT Saturday Butte/Blackfoot
region...Potomac/Seeley Lake region.

Wind Advisory from 9 am to 9 PM MDT Saturday Bitterroot/Sapphire
Mountains...Missoula/Bitterroot valleys.

Lake Wind Advisory from 9 am to 9 PM MDT Saturday
Flathead/mission valleys.

Idaho...&&

$$

National Weather Service Glossary of Abbreviations