Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 93, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 14, 2021, 6:29 PM MDT for Dewey County, Potter 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 outline as issued.
The facts
- Issued
- Aug 14, 2021, 6:29 PM MDT (00:29 UTC)
- Expired
- Aug 14, 2021, 7:15 PM MDT
- In force
- 46 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Dewey County, SD, Potter County, SD
The radar
The Aberdeen radar (KABR), 153 km from the middle of the area, began a volume at 00:30 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 00:00Z, 0.5 hours before the alert went out and 158 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
- 831 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 2191 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 397 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted.
209
WUUS53 KABR 150029
SVRABR
SDC041-107-150115-
/O.NEW.KABR.SV.W.0093.210815T0029Z-210815T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
729 PM CDT Sat Aug 14 2021
The National Weather Service in Aberdeen has issued a
* Severe Thunderstorm Warning for...
Northwestern Potter County in north central South Dakota...
Northeastern Dewey County in north central South Dakota...
* Until 815 PM CDT/715 PM MDT/.
* At 729 PM CDT/629 PM MDT/, a severe thunderstorm was located near
Blackfoot, or 17 miles south of Mobridge, moving south at 15 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.
* This severe thunderstorm will remain over mainly rural areas of
northwestern Potter and northeastern Dewey Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
&&
LAT...LON 4538 10038 4531 10031 4529 10031 4526 10027
4525 10026 4525 10025 4517 10017 4506 10059
4531 10059
TIME...MOT...LOC 0029Z 338DEG 12KT 4528 10047
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mohr1 follow-up statement
855
WWUS53 KABR 150058
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
758 PM CDT Sat Aug 14 2021
SDC041-107-150115-
/O.CON.KABR.SV.W.0093.000000T0000Z-210815T0115Z/
Potter SD-Dewey SD-
758 PM CDT Sat Aug 14 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM
CDT/715 PM MDT/ FOR NORTHWESTERN POTTER AND EAST CENTRAL DEWEY
COUNTIES...
At 757 PM CDT/657 PM MDT/, a severe thunderstorm was located 7 miles
north of Swiftbird Day School, or 23 miles south of Mobridge, moving
southeast at 15 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Lake Oahe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4531 10037 4529 10034 4524 10034 4522 10030
4520 10029 4522 10024 4517 10017 4506 10059
4524 10058
TIME...MOT...LOC 0057Z 333DEG 12KT 4520 10045
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MohrThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 7:15 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Potter | 60 min |
| Aug 14, 7:48 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Stanley, Sully | 42 min |
| Aug 14, 8:28 PM MDT | Special Weather Statement | ABR | Dewey | 32 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.