Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 87, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 7, 2021, 7:05 PM CDT for Brown County, McPherson County, South Dakota. It was in force for 40 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 7, 2021, 7:05 PM CDT (00:05 UTC)
- Expired
- Aug 7, 2021, 7:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Brown County, SD, McPherson County, SD
The radar
The Aberdeen radar (KABR), 33 km from the middle of the area, began a volume at 00:07 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 7, 7:20 PM CDT | HAIL 1 | 6 Ene Wetonka, SD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 0.1 hours before the alert went out and 89 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
- 2053 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1417 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.0
The text
As transmitted.
946
WUUS53 KABR 080005
SVRABR
SDC013-089-080045-
/O.NEW.KABR.SV.W.0087.210808T0005Z-210808T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
705 PM CDT Sat Aug 7 2021
The National Weather Service in Aberdeen has issued a
* Severe Thunderstorm Warning for...
West central Brown County in northeastern South Dakota...
Southeastern McPherson County in north central South Dakota...
* Until 745 PM CDT.
* At 705 PM CDT, a severe thunderstorm was located near Wetonka, or
17 miles northwest of Aberdeen, moving northeast at 10 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 remain over mainly rural areas of
west central Brown and southeastern McPherson Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4560 9877 4567 9885 4579 9865 4567 9852
TIME...MOT...LOC 0005Z 224DEG 10KT 4566 9871
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Wise1 follow-up statement
290
WWUS53 KABR 080021
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
721 PM CDT Sat Aug 7 2021
SDC089-080030-
/O.CAN.KABR.SV.W.0087.000000T0000Z-210808T0045Z/
McPherson SD-
721 PM CDT Sat Aug 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MCPHERSON COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4567 9852 4561 9873 4574 9873 4579 9865
TIME...MOT...LOC 0020Z 224DEG 10KT 4569 9867
$$
SDC013-080045-
/O.CON.KABR.SV.W.0087.000000T0000Z-210808T0045Z/
Brown SD-
721 PM CDT Sat Aug 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR WEST CENTRAL BROWN COUNTY...
At 720 PM CDT, a severe thunderstorm was located near Grassland
Colony, or 18 miles northwest of Aberdeen, moving northeast at 10
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 remain over mainly rural areas of west
central Brown County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4567 9852 4561 9873 4574 9873 4579 9865
TIME...MOT...LOC 0020Z 224DEG 10KT 4569 9867
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
WiseThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 7:26 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 49 min |
| Aug 7, 8:09 PM CDT | Special Weather Statement | ABR | Brown | 36 min |
| Aug 7, 8:18 PM CDT | Special Weather Statement | ABR | Brown | 27 min |
| Aug 7, 9:07 PM CDT | Special Weather Statement | ABR | Brown | 23 min |
| Aug 7, 10:09 PM CDT | Special Weather Statement | ABR | Brown | 36 min |
| Aug 7, 10:53 PM CDT | Special Weather Statement | ABR | Spink | 37 min |
| Aug 7, 11:01 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Spink | 44 min |
| Aug 7, 11:25 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Clark, Day, Spink | 50 min |
| Aug 8, 12:56 AM CDT | Severe Thunderstorm Warning | ABR | Clark | 49 min |
| Aug 8, 3:37 AM CDT | Areal Flood Warning | ABR | Clark, Day | 5 hr |
| Aug 8, 5:02 AM CDT | Areal Flood Warning | ABR | Clark, Codington, Grant | 4 hr |
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.