Montana, 2021

High Wind in Montana, December 1, 2021

December 1, 2021 · NWS GGW · 1 event in 1 county or zone

A weak disturbance passing through the area brought stronger winds aloft down to the surface in southwest Phillips County.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GGW wrote it up.

A weak disturbance passing through the area brought stronger winds aloft down to the surface in southwest Phillips County.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Glasgow, MT wrote its last area forecast discussion before the first event at Nov 30, 2:20 PM MST, 11 hours 10 minutes earlier.

Area forecast discussion, Nov 30, 2:20 PM MST, 11 hours 10 minutes before
Area Forecast Discussion
National Weather Service Glasgow MT
220 PM MST Tue Nov 30 2021

.DISCUSSION...

A warm front will continue pushing across the region for this
afternoon. While expected wind speeds did not materialize for much
of NE Montana today, do expect a couple of hours of breezy
conditions still possible for this afternoon.

Ensemble guidance still shows a strong jet tracking over the
Northern High Plains tonight into Wednesday. Forecast 850mb winds
exceed 50 kts at times over the Little Rockies during that time.
Have upgraded the High Wind Watch over to a High Wind Warning.
There is some level of support for stronger winds over the
remainder of Phillips County, a trend that next shift or two can
keep an eye on. For now, confidence just isn't there for how much
mixing will take place over the lower elevations to justify
headlines at this time.

Wednesday will also feature record high temperatures with highs in
the 60s to low 70s ahead of the next approaching cold front.
Temperatures will swing downward for the end of the week as a
second cold front pushes through the area late Thursday.

Ensemble spread continues to lend to notable uncertainty
surrounding chances for snow over the upcoming weekend, something
that will continue being monitored.

&&

.AVIATION...

VFR conditions are expected into tonight. Low level wind shear may
be a problem at times tonight into Wednesday for area terminals
with strong winds just above the surface.

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
High Wind Warning from 11 PM this evening to 5 PM MST Wednesday
for Southwest Phillips.

&&

weather.gov/glasgow

In the hours before

Local storm report, Nov 30, 10:40 PM MST, 2 hours 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1040 PM MST TUE NOV 30 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1032 PM     NON-TSTM WND GST 1 ESE ZORTMAN           47.91N 108.50W
11/30/2021  M61 MPH          PHILLIPS           MT   MESONET

            MESONET STATION ALDM8 ZORTMAN 1E.

&&

BCB

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 high wind. Local standard time, as filed.

High Wind, Little Rocky Mountains

When
December 1, 1:30 AM MST
Where
Little Rocky Mountains forecast zone
Measured
56 kt (64 mph) measured gust
Reported by
Mesonet
Coordinates
48.259, -107.913 (the zone’s center; the record gives no point)

A peak wind gust of 64 mph was measured at the BLM Zortman East Mesonet site (MTM38).

What these are

High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Montana in 2021Every state in 2021This day in weather historyWarnings in Montana, December 2021

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 995957.