Area Forecast Discussion
Issued by NWS Glasgow, MT

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
FXUS65 KGGW 270834

Area Forecast Discussion
National Weather Service GLASGOW MT
234 AM MDT TUE SEP 27 2016

.SHORT TERM...for northeast through Thu...

Synoptic Setup: Short term begins with a ridge running up the
front range from Colorado to Wyoming then pealing off north into
eastern Montana and Saskatchewan. Hot high pressure underlying the
ridge reaches west into Nevada and California. A large trough has
developed over the Gulf of Alaska and moved inland over northern
British Columbia and Alberta.

Today through Wednesday: Trough to the far northwest breaks in two
with some cool air remaining over the northeast Pacific and a
shortwave quickly moving across the Canadian Prairie Provinces. a
dry cold front will rush down the frontrange behind this system
reaching the international border overnight and dropping daytime
highs from the 70s and 80s Tuesday into the 60s and 70s Wednesday.

Wednesday night into Thursday: Pacific Trough drops south forcing
the hot air over the intermountain west to reform a ridge which
creates over the northwestern CONUS. Everything should remain dry
during these periods as the new ridge`s influence builds. A short
warming trend should also begin during this period.   GAH

.LONG TERM...Thu night through Tue...

Southwest flow aloft is expected between Thursday Night and
Sunday. An upper trough will be in the Eastern Pacific Thursday
Night and Friday. A shortwave trough in the SW flow aloft could
bring a slight chance of showers and thunderstorms to the
southeast zones Thursday Night. Otherwise, weather will remain
warm and dry into Saturday as most of the moisture stays to the

The moisture will eventually move into Northeast Montana Saturday
Night as upper trough moves inland across the Pacific NW. A cold
front is expected to move through the area on Saturday Night which
will bring chances for showers and thunderstorms.

The upper trough into Montana on Sunday with cooler temperatures
and chances for showers. Models keep the trough over the area
Monday and Tuesday with cool weather and frequent chances for
showers. Forrester


Flight category: VFR.

Synopsis: High pressure aloft will make for clear to mostly clear
conditions today and tonight.

Wind: Light and variable winds early, becoming westerly at
5-10kts around midday Tuesday and light and variable again this




$$ is the U.S. government's official web portal to all federal, state and local government web resources and services.