Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 260823

Area Forecast Discussion
National Weather Service GLASGOW MT
223 AM MDT MON SEP 26 2016

.SHORT TERM...for northeast through Wed...

Synoptic Setup: short term begins with the warmest temperatures
over the California and Oregon Coasts pointing northward into a
ridge that runs into southern British Columbia and northern
Alberta. This and a trough to the east has placed northeast
Montana under northwest flow aloft. Farther west a second trough
is developing in the Gulf of Alaska.

Today through Tuesday: Ridge will move eastward across eastern
Montana. this will keep conditions dry and partly cloudy to clear
with general warming that could reach highs in the 80s by Tuesday.

Tuesday night through Wednesday: Trough will move across British
Columbia and exit the front range over central Alberta. Most of
this energy will not reach northeast montana. However briefly
cooler temperatures may be able to drop across the International
border devoid of any moisture.   GAH

.LONG TERM...Wed night through Mon...

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
Saturday Night.

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 today and tonight.

Wind: Light and variable are expected early this morning. Then,
winds will become west to northwest 5 to 10 knots around 15z (9am
MDT) today and light and variable after sunset this evening expect
for local Milk Valley east winds around 10 knots at KGGW.




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