Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 92, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 14, 2021, 5:47 PM MDT for Dewey County, Walworth County, South Dakota. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 14, 2021, 5:47 PM MDT (23:47 UTC)
- Expired
- Aug 14, 2021, 6:30 PM MDT
- In force
- 43 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Dewey County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 146 km from the middle of the area, began a volume at 23:47 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.8 hours before the alert went out and 157 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2416 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
849
WUUS53 KABR 142347
SVRABR
SDC041-129-150030-
/O.NEW.KABR.SV.W.0092.210814T2347Z-210815T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
647 PM CDT Sat Aug 14 2021
The National Weather Service in Aberdeen has issued a
* Severe Thunderstorm Warning for...
Northeastern Dewey County in north central South Dakota...
Southwestern Walworth County in north central South Dakota...
* Until 730 PM CDT/630 PM MDT/.
* At 646 PM CDT/546 PM MDT/, a severe thunderstorm was located near
Blackfoot, or 11 miles southeast of Mobridge, moving east at 20
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
New Everets Resort around 655 PM CDT.
Swan Creek Rec Area around 705 PM CDT.
Other locations in the path of this severe thunderstorm include
Akaska.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4548 10006 4525 10011 4525 10026 4520 10027
4530 10057 4547 10049 4547 10034 4549 10035
TIME...MOT...LOC 2346Z 282DEG 15KT 4539 10034
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mohr2 follow-up statements
514
WWUS53 KABR 150014
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
714 PM CDT Sat Aug 14 2021
SDC041-129-150030-
/O.CON.KABR.SV.W.0092.000000T0000Z-210815T0030Z/
Dewey SD-Walworth SD-
714 PM CDT Sat Aug 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM
CDT/630 PM MDT/ FOR NORTHEASTERN DEWEY AND SOUTHWESTERN WALWORTH
COUNTIES...
At 713 PM CDT/613 PM MDT/, a severe thunderstorm was located near
Blackfoot, or 17 miles south of Mobridge, moving southeast at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Akaska, Swan Creek Rec Area and Blackfoot.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4525 10011 4525 10026 4520 10027 4530 10057
4543 10048 4541 10035 4540 10030 4538 10008
TIME...MOT...LOC 0013Z 325DEG 11KT 4529 10040
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mohr866
WWUS53 KABR 150020
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
720 PM CDT Sat Aug 14 2021
SDC041-129-150030-
/O.CON.KABR.SV.W.0092.000000T0000Z-210815T0030Z/
Dewey SD-Walworth SD-
720 PM CDT Sat Aug 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM
CDT/630 PM MDT/ FOR NORTHEASTERN DEWEY AND SOUTHWESTERN WALWORTH
COUNTIES...
At 719 PM CDT/619 PM MDT/, a severe thunderstorm was located near
Blackfoot, or 16 miles south of Mobridge, moving southeast at 10 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Akaska, Swan Creek Rec Area and Blackfoot.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
&&
LAT...LON 4529 10055 4542 10046 4540 10033 4539 10028
4537 10008 4525 10011 4525 10026 4520 10027
TIME...MOT...LOC 0019Z 320DEG 9KT 4531 10041
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MohrThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 4:30 PM MDT | Special Weather Statement | ABR | Brown | 45 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; radar from the NEXRAD Level II archive.