Area Forecast Discussion
Issued by NWS Glasgow, MT

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656
FXUS65 KGGW 200855
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
255 AM MDT Sun Aug 20 2017

.SHORT TERM...for northeast Montana...today through Mon...

A quiet weather pattern sets up today for Northeast Montana. Once
again there is zonal flow aloft locally between a split trough.
The trough in Canada has nudged a cold front south of our area,
while hot, desert air remains well to our south. With a surface
high over the area, wind is expected to stay less than 15kt, more
likely 5-10kt.

The forecast area should remain fairly stable today, but there
will be a struggle with the boundary between the hot air to the
south and the cooler Canadian air. Temperatures will continue
slightly lower than normal.

Tonight, the wandering frontal boundary will be intercepted by a
short-wave trough/disturbance. This could generate a few showers
and some thunder before Monday morning.

Monday, a surface high sets up over southern Saskatchewan, which
will feed a northerly breeze into the area. This will keep
temperatures just below normal.

Templer


.LONG TERM...Mon night through Sun...

Upper ridge begins building into the northern Rockies on Tuesday.
Temperatures will warm through Thursday as the ridge moves east.
Dry conditions continue under the ridge.

Upper trof lifts across the Canadian Rockies late in the week.
This trof will push a cold front through eastern Montana on Friday
with the possibility of showers and thunderstorms. Cooler weather
will follow for the weekend until the next ridge begins to build.
Ebert


&&

.AVIATION...
VFR. High pressure over the region will slide to the east today
with winds turning to the southeast.

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

weather.gov/glasgow



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