Alert archive / South Dakota / Tornado Warnings in 2021
Tornado Warning 6, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Aug 23, 2021, 8:39 PM MDT for Corson County, South Dakota. It was in force for 25 min. 1 report 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, 8:39 PM MDT (02:39 UTC)
- Expired
- Aug 23, 2021, 9:04 PM MDT
- In force
- 25 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Corson County, SD
The radar
The Bismarck radar (KBIS), 121 km from the middle of the area, began a volume at 02:43 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, 8:52 PM MDT | TSTM WND GST 60 | 6 Ssw Little Eagle, SD |
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, 2.7 hours before the alert went out and 121 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.
739
WFUS53 KABR 240239
TORABR
SDC031-240315-
/O.NEW.KABR.TO.W.0006.210824T0239Z-210824T0315Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
839 PM MDT Mon Aug 23 2021
The National Weather Service in Aberdeen has issued a
* Tornado Warning for...
Southeastern Corson County in north central South Dakota...
* Until 915 PM MDT.
* At 839 PM MDT, a severe thunderstorm capable of producing a tornado
was located near Little Eagle, or 10 miles south of Mclaughlin,
moving east at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Little Eagle around 845 PM MDT.
Other locations in the path of this tornadic thunderstorm include
Mahto and Wakpala.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4556 10093 4573 10100 4588 10043 4575 10040
4562 10043
TIME...MOT...LOC 0239Z 257DEG 31KT 4566 10088
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
TDK1 follow-up statement
283
WWUS53 KABR 240304
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
904 PM MDT Mon Aug 23 2021
SDC031-240314-
/O.CAN.KABR.TO.W.0006.000000T0000Z-210824T0315Z/
Corson SD-
904 PM MDT Mon Aug 23 2021
...THE TORNADO WARNING FOR SOUTHEASTERN CORSON COUNTY IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.
LAT...LON 4556 10093 4573 10100 4588 10043 4575 10040
4562 10043
TIME...MOT...LOC 0302Z 257DEG 31KT 4571 10058
$$
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, 8:13 PM MDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 47 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
Tornado Warnings in South Dakota, 2021Every tornado warning in 2021Tornadoes 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.