Butte-Silver Bow, Montana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

178
FXUS65 KMSO 091315 CCA
AFDMSO

Area Forecast Discussion...CORRECTED
National Weather Service Missoula MT
715 AM MDT Wed Apr 9 2025

.DISCUSSION...

KEY MESSAGES:

-  Scattered showers may cause light accumulations on area passes
   today.

-  A ridge of high pressure builds over the region on Thursday
   causing warm and dry conditions.

-  Cool and showery conditions return to the Northern Rockies this
   weekend.

The Northern Rockies will be under weak west to northwest flow
today keeping temperatures near seasonal readings along with
scattered showers. Snow levels will be slowly rising throughout
the day. Mountain passes will be experiencing some snow, but
impacts to the roads will be minimal.

A ridge of high pressure slides over the region on Thursday
allowing temperatures to climb dramatically. Afternoon readings on
Thursday will be around 15 to 20 degrees above seasonal averages.
The ridge shifts off to the east on Friday allowing for the
potential of a few showers to develop over the Northern Rockies.
Temperatures on Friday will be around 10 degrees cooler compared
to Thursday with the exception being over Lemhi county into
southwest Montana.

A cold front is still on track to push through the region Friday
night into Saturday. This front will be associated with a fairly
cold low pressure system impacting the Northern Rockies this
weekend. The latest consensus of models have shifted the low
pressure system slightly farther to the north over Glacier
National Park and Bob Marshall Wilderness. Snow levels will be
dropping to around 3000 feet by Sunday morning. The majority of
the valleys could experience some light snowfall, but snow
accumulations will be limited to non-paved surfaces while
mountain passes, especially Marias pass, could experience moderate
impacts from the snowfall.

Another ridge of high pressure tries to build over the region for
the first part of next week allowing for another period of
warming and drying conditions.

&&

.AVIATION...Scattered showers will continue to be moving through
the Northern Rockies today. Snow will be mainly confined to the
higher terrain, but area terminals could experience a period of
reduced visibility and lowered ceilings. A ridge of high pressure
will becoming the dominant feature tonight into Thursday.


&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

$$