Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 190, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Aug 27, 2021, 7:14 PM MDT for Meade County, Perkins County, Ziebach County, South Dakota. It was in force for 46 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 27, 2021, 7:14 PM MDT (01:14 UTC)
- Expired
- Aug 27, 2021, 8:00 PM MDT
- In force
- 46 min
- Issued by
- NWS Rapid City, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Meade County, SD, Perkins County, SD, Ziebach County, SD
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 1.2 hours before the alert went out and 231 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 460 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1088 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 27, 5:50 PM MDT, 1 hour 24 minutes earlier.
Area forecast discussion, Aug 27, 5:50 PM MDT, 1 hour 24 minutes before
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</html>Hazardous weather outlook, Aug 27, 3:34 AM MDT, 15 hours 40 minutes before
Hazardous Weather Outlook National Weather Service Rapid City SD 334 AM MDT Fri Aug 27 2021 SDZ027-029-041-WYZ054>056-058-280945- Southern Foot Hills-Southern Black Hills-Fall River- Northern Campbell-Southern Campbell-Western Crook-Weston- 334 AM MDT Fri Aug 27 2021 This Hazardous Weather Outlook is for portions of southwestern South Dakota...the Black Hills of South Dakota...and northeast Wyoming. .DAY ONE...Today and Tonight Critical fire weather conditions are expected today with southwest winds gusting to near 30 mph and relative humidity dropping to around 10 percent. A few thunderstorms are possible later today. A strong storm or two is possible mainly north of I-90. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Non severe thunderstorms are possible 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 SDZ001-002-014-280945- Harding-Perkins-Ziebach- 334 AM MDT Fri Aug 27 2021 This Hazardous Weather Outlook is for portions of northwestern South Dakota. .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...Saturday through Thursday Non severe thunderstorms are possible 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 SDZ026-028-030-042>044-046-047-049-074-280945- Rapid City-Central Black Hills-Custer Co Plains-Oglala Lakota- Jackson-Bennett-Mellette-Todd-Tripp-Hermosa Foot Hills- 334 AM MDT Fri Aug 27 2021 /434 AM CDT Fri Aug 27 2021/ This Hazardous Weather Outlook is for portions of south central South Dakota...southwestern South Dakota...and the Black Hills of South Dakota. .DAY ONE...Today and Tonight There is a chance of thunderstorms late this afternoon and evening, but severe storms are not expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Non severe thunderstorms are possible 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 SDZ012-013-024-025-031-032-072-073-WYZ057-071-280945- Butte-Northern Meade Co Plains-Northern Black Hills- Northern Foot Hills-Pennington Co Plains-Haakon- Sturgis/Piedmont Foot Hills-Southern Meade Co Plains- Wyoming Black Hills-Northeastern Crook- 334 AM MDT Fri Aug 27 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...Saturday through Thursday Non severe thunderstorms are possible 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
Special weather statement, Aug 27, 3:27 PM MDT, 3 hours 47 minutes before
Special Weather Statement
National Weather Service Rapid City SD
327 PM MDT Fri Aug 27 2021
WYZ056-057-071-272215-
Northeastern Crook WY-Wyoming Black Hills WY-Western Crook WY-
327 PM MDT Fri Aug 27 2021
...A strong thunderstorm will impact portions of northeastern Crook
County through 415 PM MDT...
At 327 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles east of Lightning Flat, or 42 miles southeast of Broadus,
moving east at 40 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 damage to outdoor objects is
possible.
This storm will remain over mainly rural areas of northeastern Crook
County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4500 10423 4484 10424 4489 10494 4500 10494
TIME...MOT...LOC 2127Z 269DEG 34KT 4498 10484
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
BunkersSpecial weather statement, Aug 27, 4:07 PM MDT, 3 hours 7 minutes before
Special Weather Statement
National Weather Service Rapid City SD
407 PM MDT Fri Aug 27 2021
SDZ001-012-WYZ071-272245-
Butte SD-Harding SD-Northeastern Crook WY-
407 PM MDT Fri Aug 27 2021
...Strong thunderstorms will impact portions of southwestern Harding,
northwestern Butte and northeastern Crook Counties through 445 PM
MDT...
At 407 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 12 miles southwest of Camp Crook to 10 miles
north of Colony. Movement was east-northeast at 40 mph.
HAZARD...Wind gusts of 50 to 55 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Strong thunderstorms will be near...
Camp Crook and West Short Pines around 425 PM MDT.
Other locations in the path of these storms include Antelope Butte
and Lake Gardner.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4568 10359 4498 10357 4498 10428 4500 10428
4499 10406 4501 10404 4557 10403
TIME...MOT...LOC 2207Z 252DEG 35KT 4545 10421 4501 10418
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...55 MPH
BunkersThe office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 1:40 AM MDT | Special Weather Statement | UNR | Todd | 35 min |
| Aug 28, 3:00 AM MDT | Special Weather Statement | UNR | Tripp | 60 min |
| Aug 28, 3:08 AM MDT | Special Weather Statement | UNR | Ziebach | 37 min |
| Aug 28, 3:13 AM MDT | Special Weather Statement | UNR | Ziebach | 32 min |
| Aug 28, 3:41 AM MDT | Special Weather Statement | UNR | Ziebach | 49 min |
| Aug 28, 7:00 AM MDT | Special Weather Statement | UNR | Todd, Tripp | 60 min |
| Aug 28, 8:01 AM MDT | Special Weather Statement | UNR | Todd, Tripp | 29 min |
| Aug 28, 8:44 AM MDT | Special Weather Statement | UNR | Todd | 31 min |
| Aug 28, 9:16 AM MDT | Special Weather Statement | UNR | Todd | 29 min |
| Aug 28, 9:44 AM MDT | Special Weather Statement | UNR | Todd | 31 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; the sounding from the Mesonet's radiosonde archive.