Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 211623 AAA
AFDGGW

Area Forecast Discussion...UPDATED
National Weather Service Glasgow MT
1023 AM MDT Thu Mar 21 2024

.DISCUSSION...

Morning Update: Made of fine-tuning adjustments for precipitation
chances and snow fall amounts based on current radar and model
data trends out through the next 24 hours. Today through tonight,
we are generally expecting another 1 to 2 inches near and south of
highway 200; and 3 to 4 inches near and north of the Missouri
River. Winter weather advisory may need to be extended in time to
capture the end of this current wave of snow which should taper
off near the border with North Dakota overnight tonight.
------BMickelson

Previous discussion: Winter Weather Advisory continues for much
of the region today with another round of moderate snow expected
through the afternoon. May need to extend the time on the advisory
over the eastern zones, depending on how soon the heavier snow
moves out of the region. Southwest Phillips county (the Little
Rockies) is another area of concern with snow continuing on the
mountain top through Friday.

The second wave of snow Friday afternoon through Saturday morning
will include kind of a lull or break in the action, but still may
have minor impacts if the snowfall is banded as it was today.

The third, and most impactful wave of snow will move through the
entire region from Saturday afternoon through Sunday evening.
Expect a near-steady east wind of 20 to 25 mph with gusts up to
40 mph. The most-intense snowfall will move east across mainly the
southern zones Saturday night and Sunday. Forecast has been fairly
consistent with the timing and placement of this heavier snow,
with minor run to run variations. The weekend heavy snow combined
with the current snowfall and stronger winds, will likely need a
Winter Storm Warning for a good portion of the areas. Given the
current Advisory and the day 3 to 4 time period will issue a
Winter Storm Watch to provide extra impact for messaging.

By Sunday night, the responsible flow pattern finally becomes
disrupted enough to lessen the snowfall to flurries at best.
Expect a gradual increase in temperatures next week to more
seasonable levels.


&&

.AVIATION...

WEATHER PATTERN: Multi-day snow event is now in it`s second day.
Impactful snow for NE MT TAF sites will return and become more
widespread today, then taper off by early Friday morning.

FLIGHT CONDITIONS: Currently IFR for KGGW and KOLF; MVFR for KSDY
and KGDV. Expecting widespread IFR to borderline LIFR later today
and this evening. Near VFR should return Friday afternoon.

WINDS: From the east and slightly northeast around 10 kts.

----BMickelson

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 6 PM MDT this evening for Central
and Southeast Phillips...Central and Southern Valley...Daniels...
Dawson...Eastern Roosevelt...McCone...Northern Phillips...
Northern Valley...Richland...Sheridan...Southwest Phillips...
Western Roosevelt...Wibaux.

Winter Storm Watch from Saturday afternoon through late Sunday
night for Central and Southeast Phillips...Central and Southern
Valley...Daniels...Dawson...Eastern Roosevelt...Garfield...
McCone...Northern Phillips...Northern Valley...Petroleum...
Prairie...Richland...Sheridan...Southwest Phillips...Western
Roosevelt...Wibaux.

&&

$$

weather.gov/glasgow


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