Wyoming, 2021

High Wind in Wyoming, December 13 to 14, 2021

December 13 to 14, 2021 · NWS UNR · 3 events in 3 counties and zones

Strong southwesterly winds developed over portions of northeastern Wyoming during the overnight and early morning hours. Wind gusts of 50 to 60 mph were recorded in some areas, especially over southern Campbell County and the Wyoming Black Hills.

Where it happened

Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
3

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 UNR wrote it up.

Strong southwesterly winds developed over portions of northeastern Wyoming during the overnight and early morning hours. Wind gusts of 50 to 60 mph were recorded in some areas, especially over southern Campbell County and the Wyoming Black Hills.

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 Rapid City, SD wrote its last area forecast discussion before the first event at Dec 13, 9:00 PM MST, 0 minutes earlier.

Area forecast discussion, Dec 13, 9:00 PM MST, 0 minutes before
Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
900 PM MST Mon Dec 13 2021

.UPDATE...
Issued at 857 PM MST Mon Dec 13 2021

Potent SW LLJ will continue to support windy conds across NE WY
and portions of the Black Hills. Given progged 750-775mb flow of
50+ knots persisting through Tues afternoon, have decided to issue
a high wind warning for southern Campbell County as well.

&&

.DISCUSSION...(This Evening Through Monday)
Issued at 110 PM MST Mon Dec 13 2021

Current upper air models show the long wave trough situated over
the west coast, with mild ridging over the northern plains and
southwest flow aloft. At the surface, light southwest winds are
expected to pick up this evening as a tightening mid-level
gradient enhances the flow. These increased winds will cause gusty
downslope winds for the central and northern black hills regions,
with gusts up to 60mph possible for late tonight through Tuesday
morning.

Our next potential winter system enters the region Wednesday.
Models show a shortwave ejecting out of the southwest CONUS up
through the upper midwest by Wednesday morning. Given the thermal
profile, expect leading precipitation as rain, then a transition
to mixed and eventually snow. While precipitation looks to be
widespread, lack of moisture and speed of the wave should only see
light accumulations of less than an inch for most of our forecast
area. Some localized regions could see slightly more. The larger
concern may be potential for wind headlines behind frontal
passage. High pressure rises behind the front will once again
bring gusty winds into the region. Still some uncertainty on the
exact track of the low, so will have to monitor as the week
progresses to determine if a headline will be needed.

Models begin to diverge looking ahead towards the weekend, with
some showing upper ridging moving into the upper midwest, and
others showing another potential shortwave moving through the
region, another thing to monitor through the week.

&&

.AVIATION...(For the 00Z TAFS Through 00Z Tuesday Evening)

VFR conditions will continue through the TAF forecast period.
Gusty southwest winds will continue over northeast Wyoming through
the period. The gusty winds will spread into the Black Hills
tonight where some gusts around 45kts are possible, especially in
the downslope areas of the northern/eastern foothills. LLWS will
also develop on the adjacent plains of the Black Hills, including
the KRAP terminal.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...High Wind Warning until 2 PM MST Tuesday for SDZ024-025-028.

     Wind Advisory until 2 PM MST Tuesday for SDZ072.

WY...High Wind Warning until 2 PM MST Tuesday for WYZ057.

     High Wind Warning until 5 PM MST Tuesday for WYZ055.

&&

Update...JC
DISCUSSION...Dye
AVIATION...JC
Hazardous weather outlook, Dec 13, 1:24 PM MST, 7 hours 36 minutes before
Hazardous Weather Outlook
National Weather Service Rapid City SD
Issued by National Weather Service Cheyenne WY
124 PM MST Mon Dec 13 2021

SDZ001-002-012>014-026-031-032-043-044-046-047-049-073-WYZ071-
141400-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-Rapid City-
Pennington Co Plains-Haakon-Jackson-Bennett-Mellette-Todd-Tripp-
Southern Meade Co Plains-Northeastern Crook-
124 PM MST Mon Dec 13 2021 /224 PM CST Mon Dec 13 2021/

This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.

.DAY ONE...This Afternoon and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A fast moving cold front will cross the area early Wednesday with
a period of rain transitioning to snow. Minor snow accumulations
are possible. Strong northwest winds with gust over 50 mph are
possible. The combination of wind, snow, and falling temperatures
may result in poor road conditions.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

SDZ027-029-030-041-042-074-WYZ054>056-058-141400-
Southern Foot Hills-Southern Black Hills-Custer Co Plains-
Fall River-Oglala Lakota-Hermosa Foot Hills-Northern Campbell-
Southern Campbell-Western Crook-Weston-
124 PM MST Mon Dec 13 2021

This Hazardous Weather Outlook is for portions of southwestern
South Dakota...the Black Hills of South Dakota...and northeast
Wyoming.

.DAY ONE...This Afternoon and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A fast moving cold front will cross the area early Wednesday with
a period of rain transitioning to snow. Minor snow accumulations
are possible. Strong northwest winds with gust over 40 mph are
possible. The combination of wind, snow, and falling temperatures
may result in poor road conditions.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

SDZ024-025-028-072-WYZ057-141400-
Northern Black Hills-Northern Foot Hills-Central Black Hills-
Sturgis/Piedmont Foot Hills-Wyoming Black Hills-
124 PM MST Mon Dec 13 2021

This Hazardous Weather Outlook is for portions of northwestern
South Dakota...the Black Hills of South Dakota...and the Black
Hills of Wyoming.

.DAY ONE...This Afternoon and Tonight

Gusty southwest winds will develop in the northern and eastern
slopes of the Black Hills tonight with gusts of 50 to 60+ mph.
See the latest FSDNPWUNR for more information.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A fast moving cold front will cross the area early Wednesday with
a period of rain transitioning to snow. Minor snow accumulations
are possible. Strong northwest winds with gust over 40 mph are
possible. The combination of wind, snow, and falling temperatures
may result in poor road conditions.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

In the hours before

Local storm report, Dec 13, 8:21 PM MST, 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
821 PM MST MON DEC 13 2021

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

0753 PM     NON-TSTM WND GST 5 NNW DWTN GILLETTE     44.34N 105.54W
12/13/2021  M51 MPH          CAMPBELL           WY   ASOS

&&

JC

The radar

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

Open the radar archive at this moment

Event by event

3 high wind. Local standard time, as filed.

High Wind, Northern Campbell

When
December 13, 9:00 PM MST to 11:00 PM MST
Where
Northern Campbell forecast zone
Measured
52 kt (60 mph) measured gust
Reported by
ASOS
Coordinates
44.248, -105.548 (the zone’s center; the record gives no point)

High Wind, Wyoming Black Hills

When
December 13, 11:00 PM MST to December 14, 5:00 AM MST
Where
Wyoming Black Hills forecast zone
Measured
40 kt (46 mph) measured sustained
Reported by
Mesonet
Coordinates
44.215, -104.569 (the zone’s center; the record gives no point)

High Wind, South Campbell

When
December 14, 4:00 AM MST to 5:00 AM MST
Where
South Campbell forecast zone
Measured
41 kt (47 mph) measured sustained
Reported by
Mesonet
Coordinates
44.248, -105.548 (the zone’s center; the record gives no point)

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 Wyoming in 2021Every state in 2021This day in weather historyWarnings in Wyoming, 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: 991540, 991539, 991538.