Weather Service Report

FXUS65 KGGW 290857

Area Forecast Discussion
National Weather Service GLASGOW MT
257 AM MDT MON AUG 29 2016

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

The short term period begins for Northeast Montana with an upper
ridge in place over the Divide and zonal flow aloft. The boundary
between the cooler air-mass to the north and the warmer air-mass
to the south will be across the local area. This will result in
near normal temperatures today. A surface high in place with bring
mostly clear skies. 

Off the coast of Southeast Alaska and British Columbia there is a
trough that will work its way south during the period ending up
off the Washington/Oregon coast by Wednesday afternoon. The
movement of the trough will amplify the upper ridge well north
into northern Canada Tuesday and Wednesday. This will develop a
path for hot desert air to push north through Northeast Montana.
So expect temperatures to rise to around 10f degrees above normal. 

The period is expected to remain stable and mostly dry. But minor
weak disturbances from the movement of the frontal boundary may
develop a few showers and thunderstorms, with not much in the way
of measurable rain.


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

Upper ridge will move to the east Wednesday Night and Thursday
turning the flow aloft to the southwest. The SW flow aloft will
continue to bring warm summerlike temperatures in the 90s for
Thursday which will be 10 to 15 degrees above normal. Weak waves
in the SW flow aloft and a somewhat unstable atmosphere may
produce a few thunderstorms. Will mention a slight chance. 

A cold front is expected on Friday as an upper trough moves inland
from the Pacific. While most of the moisture stays to the north of
the forecast area, an unstable atmosphere may allow for a few

Expect breezy and cooler weather on Saturday behind cold front.
Weak waves on SW flow aloft will continue to bring slight chances
for showers and thunderstorms over the weekend. Models have the
upper trough moving through Eastern Montana either Sunday Night or
Monday. Will maintain a slight chance of showers on Monday with
the possibility of the upper trough being in the area. Forrester


Flight category: VFR

Synopsis: Surface high pressure will move across Northeast Montana
today. Mid and high clouds will clear this morning and skies will
remain clear through tonight. 

Wind: Northeast wind 5 to 10 knots this morning will veer to the
east to southeast by afternoon and remain ESE tonight.





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