Damaging Winds in Wyoming, June 6 to 7, 2026

Name: Damaging Winds in Wyoming, June 6 to 7, 2026
Start: 2026-06-06T17:23
End: 2026-06-07T18:45
Location: Wyoming

June 6 to 7, 2026 · NWS UNR · 9 events in 3 counties and zones

Severe thunderstorms brought damaging winds to eastern Wyoming.

Where it happened

Every event with a place to put it. 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

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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 9

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.

Severe thunderstorms brought damaging winds to eastern Wyoming.

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 Jun 6, 4:49 PM MST, 34 minutes earlier. Its key messages:

High-based storms capable of gusty winds are possible over northeast Wyoming, far western South Dakota, and the Black Hills through the overnight hours.
A cold front moves slowly through the area Sunday and Sunday night, bringing showers and thunderstorms, severe storms are possible.

Area forecast discussion, Jun 6, 4:49 PM MST, 34 minutes before

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
549 PM MDT Sat Jun 6 2026

.KEY MESSAGES...

- High-based storms capable of gusty winds are possible over
  northeast Wyoming, far western South Dakota, and the Black Hills
  through the overnight hours.

- A cold front moves slowly through the area Sunday and Sunday
  night, bringing showers and thunderstorms, severe storms are
  possible.

&&

.DISCUSSION...(This Evening Through Saturday)
Issued at 110 PM MDT Sat Jun 6 2026

Upper level analysis has a shortwave ridge centered over the Eastern
Dakotas with a low dropping into the Pacific Northwest. At the
surface a cold front extends from northeastern Montana into
southwestern Idaho, with a weak lee trof developing near the
Bighorns. Visible satellite indicates a few mid level clouds ahead
of the front with the lower portions of the UNR 18Z sounding
showing very dry air off the surface.

For tonight, a high-based storm or two could get going over the
Black Hills or northeastern Wyoming due to daytime heating and the
forcing of the lee trof. Hi-res models are indicating a broken line
of strong showers and storms along the trof, extending along the
WY/SD border by 02Z-ish. With limited low-level moisture, the
primary threat would be gusty winds.

The cold front approaches the area around 06Z tonight, reaching
the SD/WY border near 12Z. From there, it is expected to stall-
out. This stalled boundary will be the primary focus for
convection during the afternoon and evening. Supercell development
is possible with 0-6 km shear estimated to be 40-50 kts, steep
lapse rates, MLCAPE of 1700 J/kg, and MUCAPE 2400 J/kg. With drier
air still expected off the surface and dewpoints ranging from 35
to 55 degrees, expect LP supercells capable of producing
significant hail and very strong winds. A tornado could also be
possible.

Monday will be cooler behind the cold front, with highs only in the
70s and 80s. Surface high pressure will slide through the CWA,
resulting in increasing southeasterly winds of 10-25 mph during the
afternoon. Another hot day is ahead on Tuesday with prefrontal
warming back into the 90s. Once again the NBM is probably running
too, due to the greenness. A deep upper low and another cold front
impact the area on Wednesday and Thursday, resulting in a chance for
scattered storms.

&&

.AVIATION...(For the 00Z TAFS Through 00Z Sunday Evening)
Issued At 547 PM MDT Sat Jun 6 2026

VFR conditions are generally expected through most of the
forecast period. Isolated high-based thunderstorms are possible
this evening across portions of northeast Wyoming, the Black
Hills area, and northwest South Dakota where transient MVFR
conditions are possible, along with gusty/erratic winds. Isolated
gusts to 45kt or higher are possible in the strongest storms.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Wind Advisory until 9 PM MDT this evening for SDZ001-002-012>014-
     078.
WY...None.
&&

DISCUSSION/KEY MESSAGES...MLS
AVIATION...13

In the hours before

Local storm report, Jun 6, 4:07 PM MST, 1 hour 16 minutes before

Preliminary Local Storm Report
National Weather Service Rapid City SD
507 PM MDT Sat Jun 06 2026

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

0453 PM     Non-Tstm Wnd Gst 17 NNW New Haven        44.95N 105.04W
06/06/2026  M59 mph          Crook              WY   Mesonet

&&

CALDERON

Special weather statement, Jun 6, 4:38 PM MST, 45 minutes before

Special Weather Statement
National Weather Service Rapid City SD
538 PM MDT Sat Jun 6 2026

WYZ056-057-060-070015-
Wyoming Black Hills WY-Western Crook WY-Northeastern Crook WY-
538 PM MDT Sat Jun 6 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL CROOK COUNTY
THROUGH 615 PM MDT...

At 538 PM MDT, Doppler radar was tracking a strong thunderstorm 6
miles north of Hulett, or 28 miles northwest of Sundance, moving
northeast at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Hulett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4500 10475 4500 10455 4495 10426 4466 10458
      4473 10481
TIME...MOT...LOC 2338Z 204DEG 22KT 4477 10465

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

Wong

Local storm report, Jun 6, 4:50 PM MST, 33 minutes before

Preliminary Local Storm Report
National Weather Service Rapid City SD
550 PM MDT Sat Jun 06 2026

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

0541 PM     Non-Tstm Wnd Gst 10 WNW Savageton        43.92N 105.98W
06/06/2026  M52 mph          Campbell           WY   Mesonet

&&

CALDERON

Special weather statement, Jun 6, 4:53 PM MST, 30 minutes before

Special Weather Statement
National Weather Service Rapid City SD
553 PM MDT Sat Jun 6 2026

SDZ027-029-074-070030-
Southern Black Hills SD-Hermosa Foothills SD-Southern Foothills SD-
553 PM MDT Sat Jun 6 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL CUSTER AND
NORTHERN FALL RIVER COUNTIES THROUGH 630 PM MDT...

At 553 PM MDT, Doppler radar was tracking a strong thunderstorm over
Cold Brook Reservoir, or near Hot Springs, moving north at 25 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Hot Springs, Wind Cave National Park, and Cold Brook Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4340 10344 4343 10355 4364 10355 4360 10325
TIME...MOT...LOC 2353Z 196DEG 21KT 4346 10350

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

Wong

Local storm report, Jun 6, 4:57 PM MST, 26 minutes before

Preliminary Local Storm Report
National Weather Service Rapid City SD
557 PM MDT Sat Jun 06 2026

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

0551 PM     Non-Tstm Wnd Gst 1 NE Echeta             44.47N 105.84W
06/06/2026  M54 mph          Campbell           WY   Mesonet

&&

CALDERON

The radar

The Billings radar (KBLX), 233 km away, was scanning. The volume nearest the first event began at 00:25 UTC.

Open the radar archive at this moment