Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 221026
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
426 AM MDT Sun Oct 22 2017

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

Jet core punching into the Pacific Northwest early this morning
expected to push across the Northern Rockies and into eastern
Montana by this afternoon. Lee trof developing ahead of this jet
across central Montana, with a few showers along the boundary.

Good mixing expected today as the jet core crosses the region.
Clipper system develops along the front in Alberta before sliding
east, bringing cold air advection and pressure rises to aid in the
mixing. The addition of scattered showers to increase wind gusts
as the moisture from the evaporates, increases confidence for High
Wind Warning for much of the region today.

Winds only diminish slightly tonight as clipper moves east. Jet
remains overhead, but will be changing orientation to the
northwest as it digs into the trof over the Mississippi valley
left by previous trof. Ending of shower activity will also
diminish the stronger gust potential.

Dry but still windy conditions expected on Monday. Jet will be
slowly shifting eastward with ridge pushing over the west coast.
Ebert

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

Tuesday into Wednesday, a warming and drying trend returns to the
area thanks to high pressure building over the northern Rockies.

Models in slightly better agreement with the next clipper diving
through the Canadian prairies. Strong winds, some rain or snow
showers and much colder air expected with this system Wednesday
night into Thursday. Very cold temperatures expected for Thursday
night with Canadian high clearing skies and weakening winds.

Pacific ridge pushes east into the weekend for rebounding
temperatures and dry weather. Ebert

&&

.AVIATION...

VFR as an Alberta clipper races through the area today. Very
strong west winds will develop by late this morning, with low
level wind shear a concern until around 17z. Strongest wind gusts
are expected this afternoon and evening with only slight weakening
overnight and Monday.

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
High Wind Warning from 10 AM this morning to 8 PM MDT this
evening for Central and Southeast Phillips...Central and
Southern Valley...Dawson...Garfield...McCone...Northern
Phillips...Petroleum...Prairie...Richland...Southwest Phillips...
Wibaux.

Lake Wind Advisory until 10 AM MDT this morning For Fort Peck
Lake for Central and Southeast Phillips...Central and Southern
Valley...Garfield...McCone...Petroleum.

Lake Wind Advisory from 8 PM this evening to 6 PM MDT Monday For
Fort Peck Lake for Central and Southeast Phillips...Central and
Southern Valley...Garfield...McCone...Petroleum.

&&

$$

weather.gov/glasgow



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