Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 112, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 23, 2021, 8:13 PM MDT for Corson County, Dewey County, South Dakota. It was in force for 47 min. 8 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 23, 2021, 8:13 PM MDT (02:13 UTC)
- Expired
- Aug 23, 2021, 9:00 PM MDT
- In force
- 47 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Corson County, SD, Dewey County, SD
The radar
The Bismarck radar (KBIS), 124 km from the middle of the area, began a volume at 02:14 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 23, 8:15 PM MDT | TSTM WND DMG | 10 S Bullhead, SD | CORRECTS TIME ON PREVIOUS TSTM WND DMG REPORT FROM 10 S BULLHEAD. SHINGLES BLOWN OF HOUSE, ROLLED TIN, LOTS OF BRANCHES OFF TREES. |
| Aug 23, 8:25 PM MDT | TSTM WND DMG | 11 N Timber Lake, SD | ROOF BLOWN OFF BARN. |
| Aug 23, 8:26 PM MDT | TSTM WND GST 112 | 11 S Bullhead, SD | CORRECTS TIME FOR PREVIOUS TSTM WND GST REPORT FROM 11 S BULLHEAD. GRAND RIVER RAWS MESONET. |
| Aug 23, 8:46 PM MDT | TSTM WND GST 63 | 1 Ne Timber Lake, SD | MESONET STATION 293 TIMBER LAKE (SDDOT). |
| Aug 23, 8:47 PM MDT | HAIL 1 | 2.5 N Timber Lake, SD | SOCIAL MEDIA REPORT. |
| Aug 23, 8:52 PM MDT | TSTM WND GST 60 | 6 Ssw Little Eagle, SD | |
| Aug 23, 9:06 PM MDT | TSTM WND GST 112 | 11 S Bullhead, SD | GRAND RIVER RAWS MESONET. |
| Aug 23, 9:08 PM MDT | TSTM WND GST 65 | 4 W Trail City, SD | MESONET STATION 178 TRAIL CITY (SDDOT). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 2.2 hours before the alert went out and 125 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
- 16 J/kg
- Mixed-layer CIN
- -172 J/kg
- Mixed-layer LCL
- 2391 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 508 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
010
WUUS53 KABR 240213
SVRABR
SDC031-041-240300-
/O.NEW.KABR.SV.W.0112.210824T0213Z-210824T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
813 PM MDT Mon Aug 23 2021
The National Weather Service in Aberdeen has issued a
* Severe Thunderstorm Warning for...
Eastern Corson County in north central South Dakota...
Northwestern Dewey County in north central South Dakota...
* Until 900 PM MDT.
* At 813 PM MDT, a severe thunderstorm was located 8 miles southeast
of Klein Ranch, or 26 miles southwest of Mclaughlin, moving east at
45 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...
Little Eagle and Mahto.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4593 10067 4545 10050 4532 10145 4569 10151
TIME...MOT...LOC 0213Z 254DEG 40KT 4557 10123
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TDK2 follow-up statements
162
WWUS53 KABR 240235
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
835 PM MDT Mon Aug 23 2021
SDC031-041-240300-
/O.CON.KABR.SV.W.0112.000000T0000Z-210824T0300Z/
Corson SD-Dewey SD-
835 PM MDT Mon Aug 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR EASTERN CORSON AND NORTHWESTERN DEWEY COUNTIES...
At 834 PM MDT, a severe thunderstorm was located near Little Eagle,
or 12 miles southwest of Mclaughlin, moving east at 55 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Mclaughlin, Timber Lake, Isabel, Firesteel, Trail City, Mahto, Little
Eagle, Bullhead, Black Horse, Spring Lake, Klein Ranch, Glencross and
southeastern Standing Rock Nation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4593 10067 4545 10050 4532 10145 4569 10151
TIME...MOT...LOC 0234Z 253DEG 48KT 4565 10091
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
TDK895
WWUS53 KABR 240254
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
854 PM MDT Mon Aug 23 2021
SDC031-041-240300-
/O.CON.KABR.SV.W.0112.000000T0000Z-210824T0300Z/
Corson SD-Dewey SD-
854 PM MDT Mon Aug 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR EASTERN CORSON AND NORTH CENTRAL DEWEY COUNTIES...
At 853 PM MDT, a severe thunderstorm was located over Spring Lake, or
23 miles south of Mclaughlin, moving east at 45 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Mclaughlin, Timber Lake, Spring Lake, Trail City, Mahto, Little Eagle
and Glencross.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
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 4593 10067 4545 10050 4536 10114 4558 10122
TIME...MOT...LOC 0253Z 248DEG 40KT 4548 10095
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
TDKThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 6:12 PM MDT | Severe Thunderstorm Warning | ABR | Dewey | 48 min |
| Aug 23, 7:42 PM MDT | Severe Thunderstorm Warning | ABR | Corson | 48 min |
| Aug 23, 8:39 PM MDT | Tornado Warning | ABR | Corson | 25 min |
| Aug 23, 9:01 PM MDT | Severe Thunderstorm Warning | ABR | Campbell, Corson, Dewey, Walworth | 59 min |
| Aug 23, 9:17 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Potter, Walworth | 43 min |
| Aug 23, 9:45 PM MDT | Special Weather Statement | ABR | Campbell | 30 min |
| Aug 23, 9:56 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Potter, Walworth | 64 min |
| Aug 23, 10:02 PM MDT | Special Weather Statement | ABR | Campbell | 43 min |
| Aug 23, 10:51 PM MDT | Severe Thunderstorm Warning | ABR | Faulk, Potter | 54 min |
| Aug 23, 11:01 PM MDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, McPherson | 59 min |
| Aug 23, 11:56 PM MDT | Severe Thunderstorm Warning | ABR | Brown, Day, Marshall | 64 min |
| Aug 24, 12:05 AM MDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, Faulk, Hand, Spink | 55 min |
| Aug 24, 1:52 AM MDT | Special Weather Statement | ABR | Grant | 68 min |
| Aug 24, 5:06 AM MDT | Special Weather Statement | ABR | Day, Roberts | 24 min |
| Aug 24, 5:50 AM MDT | Special Weather Statement | ABR | Grant | 25 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.