Area Forecast Discussion
Issued by NWS Glasgow, MT

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
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

FXUS65 KGGW 171502

Area Forecast Discussion
National Weather Service Glasgow MT
802 AM MST Mon Feb 17 2020

Morning Update...
A cold front will move through the area this evening into early
tonight. This will usher in significantly colder air along with a
round of snow showers. Most locations throughout Northeast Montana
will see a quick half inch to one inch of snow between 5 PM and 10
PM this evening. As winds increase behind the front we will see
wind chill values surpass 20 below zero and a Wind Chill Advisory
will be needed for portions of Valley, Daniels, and Sheridan


Previous Discussion...
Broad upper trof over North America will deepen briefly before
being pushed east by ridge building across the west coast. Shortwave
dropping out of Alaska is expected to pull arctic airmass south
tonight. Cold air will linger into midweek before ridge begins to
bring warmer air back to the region.

A few snow showers will linger over the region today within the
northwest flow. A more organized band is expected in the late
afternoon and evening as the cold front drops south across the
region. Expect a brief increase in winds with the front, but
sustained gusty winds are not expected. Temperatures should drop
low enough by the early morning that could need a wind chill
advisory in the northeast.

As the arctic high follows the cold front, chances of snow shift
to the upslope areas of the southwest zones for Tuesday morning.
Cold air lingers over eastern Montana as the high moves through
the northern plains. Arctic will begin to shallow by Wednesday
with high moving into the upper midwest, and upper ridge builds
into the Pacific Northwest.

Warm air continues to spread east with the upper ridge through
next weekend. Ebert


Generally VFR conditions, but with MVFR or IFR conditions possible
as snow showers move across the region today. More widespread
reduced flight conditions are expected overnight as a cold front
brings another band of snow south from Canada. Much colder air
will follow the front, pushing temperatures to near or below zero
by Tuesday morning.




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