Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 184, NWS Rapid City, SD

August 26, 2021Custer County, Pennington County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Aug 26, 2021, 6:54 PM MDT for Custer County, Pennington County, South Dakota. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 26, 2021, 6:54 PM MDT (00:54 UTC)
Expired
Aug 26, 2021, 8:00 PM MDT
In force
66 min
Issued by
NWS Rapid City, SD
Area
Storm-based polygon
Damage threat
Considerable
Hail
1.75 in
Wind
50.0 mph

Counties Custer County, SD, Pennington County, SD

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 26, 5:46 PM MDT, 1 hour 8 minutes earlier.

Area forecast discussion, Aug 26, 5:46 PM MDT, 1 hour 8 minutes before
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Hazardous weather outlook, Aug 26, 4:06 AM MDT, 14 hours 48 minutes before
Hazardous Weather Outlook
National Weather Service Rapid City SD
406 AM MDT Thu Aug 26 2021

WYZ054>056-058-271015-
Northern Campbell-Southern Campbell-Western Crook-Weston-
406 AM MDT Thu Aug 26 2021

This Hazardous Weather Outlook is for portions of northeast
Wyoming.

.DAY ONE...Today and Tonight

There is a marginal risk of severe thunderstorms late this
afternoon and evening. Large hail and damaging winds will be the
main threats.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A few thunderstorms are possible on Friday and Saturday, but
widespread severe storms are not expected.

A Fire Weather Watch is in effect for Friday afternoon and
evening for relative humidities of 10 to 15 percent and southwest
winds gusting around 30 mph.

.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

SDZ001-002-012-024-025-WYZ057-071-271015-
Harding-Perkins-Butte-Northern Black Hills-Northern Foot Hills-
Wyoming Black Hills-Northeastern Crook-
406 AM MDT Thu Aug 26 2021

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

.DAY ONE...Today and Tonight

There is a marginal risk of severe thunderstorms late this
afternoon and evening. Large hail and damaging winds will be the
main threats.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is a marginal risk of severe thunderstorms on Friday. Large
hail and damaging winds will be the main threats. On Saturday,
additional storms are possible but severe storms are not
expected.

.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

SDZ013-014-026>032-041>044-046-047-049-072>074-271015-
Northern Meade Co Plains-Ziebach-Rapid City-Southern Foot Hills-
Central Black Hills-Southern Black Hills-Custer Co Plains-
Pennington Co Plains-Haakon-Fall River-Oglala Lakota-Jackson-
Bennett-Mellette-Todd-Tripp-Sturgis/Piedmont Foot Hills-
Southern Meade Co Plains-Hermosa Foot Hills-
406 AM MDT Thu Aug 26 2021 /506 AM CDT Thu Aug 26 2021/

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

.DAY ONE...Today and Tonight

There is a slight risk of severe thunderstorms late this
afternoon and evening. Large hail and damaging winds will be the
main threats.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Additional thunderstorms are possible both Friday and Saturday.
There is a marginal risk of severe storms Friday, mainly over
northwest South Dakota, with large hail and damaging winds the
main threats. Severe storms are not expected on Saturday.

.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, Aug 26, 4:06 PM MDT, 2 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
406 PM MDT THU AUG 26 2021

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

0355 PM     HAIL             3 SSW CARLILE           44.44N 104.81W
08/26/2021  M0.88 INCH       CROOK              WY   TRAINED SPOTTER

            DIME TO NICKEL HAIL

&&

DYE
Special weather statement, Aug 26, 4:24 PM MDT, 2 hours 30 minutes before
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Special weather statement, Aug 26, 5:12 PM MDT, 1 hour 42 minutes before
Special Weather Statement
National Weather Service Rapid City SD
512 PM MDT Thu Aug 26 2021

SDZ024-025-WYZ057-262345-
Northern Black Hills SD-Northern Foot Hills SD-
Wyoming Black Hills WY-
512 PM MDT Thu Aug 26 2021

...A strong thunderstorm will impact portions of west central
Lawrence and eastern Crook Counties through 545 PM MDT...

At 511 PM MDT, Doppler radar was tracking a strong thunderstorm over
Iron Creek Lake, or 10 miles west of Lead, moving east at 30 mph.

HAZARD...Winds in excess of 30 mph and half inch hail.

SOURCE...Radar indicated.

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

This strong thunderstorm will be near...
  Roughlock Falls and Savoy around 515 PM MDT.
  Cheyenne Crossing around 520 PM MDT.
  Bridal Veil Falls, Spearfish Canyon and Terry Peak around 525 PM
  MDT.
  Southeastern Spearfish around 530 PM MDT.

Other locations in the path of this storm include Lead and Central
City.

This includes Interstate 90 in South Dakota between Mile Markers 15
and 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4428 10414 4444 10416 4448 10378 4428 10376
TIME...MOT...LOC 2311Z 259DEG 25KT 4436 10398

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH

JC
Special weather statement, Aug 26, 5:13 PM MDT, 1 hour 41 minutes before
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Local storm report, Aug 26, 5:40 PM MDT, 1 hour 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
540 PM MDT THU AUG 26 2021

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

0529 PM     HAIL             CHEYENNE CROSSING       44.30N 103.87W
08/26/2021  M1.00 INCH       LAWRENCE           SD   TRAINED SPOTTER

&&

DYE
Local storm report, Aug 26, 6:42 PM MDT, 12 minutes before
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The office that day

Everything else NWS Rapid City, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 26, 7:48 PM MDTSevere Thunderstorm Warning Considerable damage threatUNRCuster, Pennington57 min
Aug 26, 8:38 PM MDTSevere Thunderstorm WarningUNRMeade, Pennington52 min
Aug 26, 9:02 PM MDTSpecial Weather StatementUNRPennington58 min
Aug 26, 9:33 PM MDTSpecial Weather StatementUNRHaakon, Jackson42 min
Aug 26, 10:17 PM MDTSpecial Weather StatementUNRHaakon58 min
Aug 26, 10:31 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Ziebach59 min
Aug 27, 12:42 AM MDTSpecial Weather StatementUNRTripp48 min
Aug 27, 1:23 AM MDTSpecial Weather StatementUNRHaakon52 min
Aug 27, 2:05 AM MDTRed Flag WarningUNRCuster, Fall River16 hr
Aug 27, 4:07 PM MDTSpecial Weather StatementUNRHarding38 min
Aug 27, 4:27 PM MDTSevere Thunderstorm WarningUNRButte, Harding78 min
Aug 27, 5:39 PM MDTSevere Thunderstorm Warning Considerable damage threatUNRButte, Meade, Perkins96 min
Aug 27, 3:27 PM MDTSpecial Weather StatementUNRCrook48 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2021Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.