Area Forecast Discussion
Issued by NWS Glasgow, MT
FXUS65 KGGW 262052
Area Forecast Discussion
National Weather Service GLASGOW MT
252 PM MDT MON SEP 26 2016
.SHORT TERM...for northeast Montana...tonight through Wed...
An upper ridge building into Montana today will stay in control
across the area during this period. But a system traversing central
Canada will spread cooler air into the region Wednesday.
A warm surge of air taking place across the Northern Rockies will
push into our area Tuesday with 850 mb temps rising from the teens
today to the 20s Celsius. Also, some compressional warming is
expected ahead of a cold front, so forecast high temperatures are a
couple degrees over model projections. Fire weather concerns look to
be minimal as winds are expected to remain 15 kts or less during the
afternoon with humidities in the mid 20s and 30s percent.
Tuesday night, the cold front moves south across the CWA. The
strongest winds move through after midnight but nowhere near Lake
Wind Advisory criteria.
Wednesday, surface high pressure moves east across the Prairie
provinces. Light north winds will become easterly during the
afternoon. High temperatures will about 10 degrees cooler over
.LONG TERM...Wed night through Mon...
The going forecast looks to be in good shape. The only real change
was to bump temperatures up a couple of degrees toward the end of
Previous long term discussion: Upper ridge moves to the east
Wednesday Night and Thursday. Flow aloft will become southwest on
Thursday as upper trough in the Eastern Pacific moves towards the
Pacific NW and BC coast. Weather will remain warm and dry Thursday
and most of Friday as moisture stays to the west.
The moisture will eventually move into Northeast Montana Friday
Night and Saturday as upper trough moves inland across the Pacific
NW. A cold front is expected to move through the area on Saturday
which will bring chances for showers and thunderstorms through
The upper trough moves through Montana on Sunday with cooler
temperatures and chances for showers.
Model differences show up Sunday Night and Monday as they differ
on whether or not to maintain or weaken the upper trough. Will
maintain at least a slight chance of showers. Forrester
Flight category: VFR.
Synopsis: High pressure aloft will make for clear to mostly clear
conditions tonight and Tuesday.
Wind: Generally west to northwest winds at 5 to 10 knots will
become light and variable tonight. Light and variable winds can be
expected to prevail through Tuesday morning.