FXUS65 KGGW 260850
Area Forecast Discussion
National Weather Service Glasgow MT
250 AM MDT Wed Sep 26 2018
NW flow aloft will prevail the next few days over the region with
an upper ridge on the west coast and a trough over Hudson Bay and
the Great Lakes.
Today will be dry with the forecast area between waves in the NW
flow aloft. However, a weak frontal boundary is expected around
noon today which will lead to strong enough NW winds this
afternoon to require a Lake Wind Advisory for Fort Peck Lake.
A stronger back door cold front drops south across NE Montana
tonight with a shortwave late tonight and Thursday. Moisture from
the Pacific will override this front. There will be a chance for
rain showers to the region tonight and Thursday with the best
chance in the SW zones on Thursday.
The front and moisture moves to the south Thursday Night and high
pressure builds into the area with clearing skies. Colder air mass
will bring below freezing temperature to most possibly all
locations for lows.
Friday and Saturday is expected to be dry and cool with the
surface high over the area.
Next cold front pushes south across the region Saturday Night with
Pacific moisture overrunning it. Models differ somewhat on the
timing of the upper trough at this point. Temperatures are
expected to be cold enough Saturday Night and Sunday morning for a
chance of snow in some areas.
Another cold front is expected on Tuesday with a chance of rain or
snow depending on temperatures. Forrester
VFR conditions will prevail across all TAF sites today and most of
tonight. There will be an increase in mid and high level clouds
today. Light winds this morning will become northwest 15 to 20
knots around noon (18Z) today.
With a cold front tonight, there is a chance of rain. Lower
ceilings are expected which may bring MVFR conditions at times. NW
winds 10 to 15 knots are expected tonight.
Lake Wind Advisory from 11 AM this morning to 9 PM MDT this
evening For Fort Peck Lake for Central and Southeast Phillips...
Central and Southern Valley...Garfield...McCone...Petroleum.
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