Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 55, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 8, 2021, 10:22 PM MDT for Corson County, Dewey County, South Dakota. It was in force for 53 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
- Jul 8, 2021, 10:22 PM MDT (04:22 UTC)
- Expired
- Jul 8, 2021, 11:15 PM MDT
- In force
- 53 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 2.0 in
- Wind
- 60.0 mph
Counties Corson County, SD, Dewey County, SD
The radar
The Bismarck radar (KBIS), 156 km from the middle of the area, began a volume at 04:21 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 |
|---|---|---|---|
| Jul 8, 10:40 PM MDT | HAIL 1.75 | 1 Ene Firesteel, SD | TIME OF REPORT ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 8, 8:33 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 4.4 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
- 624 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1380 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.8
The text
As transmitted.
821
WUUS53 KABR 090422
SVRABR
SDC031-041-090515-
/O.NEW.KABR.SV.W.0055.210709T0422Z-210709T0515Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
1022 PM MDT Thu Jul 8 2021
The National Weather Service in Aberdeen has issued a
* Severe Thunderstorm Warning for...
Southwestern Corson County in north central South Dakota...
Northwestern Dewey County in north central South Dakota...
* Until 1115 PM MDT.
* At 1021 PM MDT, a severe thunderstorm was located 9 miles
southwest of Klein Ranch, or 35 miles north of Dupree, moving
southeast at 40 mph.
HAZARD...Two inch 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 be near...
Isabel around 1040 PM MDT.
Other locations in the path of this severe thunderstorm include
Firesteel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!
&&
LAT...LON 4565 10139 4523 10092 4519 10148 4538 10149
4539 10147 4547 10147 4548 10162 4560 10163
TIME...MOT...LOC 0421Z 327DEG 31KT 4556 10149
HAIL...2.00IN
WIND...60MPH
$$
Connelly3 follow-up statements
571
WWUS53 KABR 090439
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
1039 PM MDT Thu Jul 8 2021
SDC031-041-090515-
/O.CON.KABR.SV.W.0055.000000T0000Z-210709T0515Z/
Corson SD-Dewey SD-
1039 PM MDT Thu Jul 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT
FOR SOUTHWESTERN CORSON AND NORTHWESTERN DEWEY COUNTIES...
At 1039 PM MDT, a severe thunderstorm was located near Isabel, or 28
miles north of Lantry, moving southeast at 40 mph.
HAZARD...Two inch hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
southwestern Corson and northwestern Dewey Counties, including the
following locations... northern Cheyenne River Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
&&
LAT...LON 4553 10131 4549 10121 4523 10092 4520 10141
4538 10145 4546 10144 4550 10138
TIME...MOT...LOC 0439Z 327DEG 31KT 4542 10137
HAIL...2.00IN
WIND...60MPH
$$
Connelly125
WWUS53 KABR 090452
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
1052 PM MDT Thu Jul 8 2021
SDC031-090501-
/O.CAN.KABR.SV.W.0055.000000T0000Z-210709T0515Z/
Corson SD-
1052 PM MDT Thu Jul 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CORSON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 AM MDT for
north central South Dakota.
LAT...LON 4546 10123 4545 10117 4523 10092 4521 10125
4537 10131 4545 10131
TIME...MOT...LOC 0451Z 320DEG 27KT 4536 10119
$$
SDC041-090515-
/O.CON.KABR.SV.W.0055.000000T0000Z-210709T0515Z/
Dewey SD-
1052 PM MDT Thu Jul 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT
FOR NORTHWESTERN DEWEY COUNTY...
At 1051 PM MDT, a severe thunderstorm was located near Little Moreau
Rec Area, or 24 miles north of Eagle Butte, moving southeast at 30
mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Firesteel, Little Moreau Rec Area and northern Cheyenne River
Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
&&
LAT...LON 4546 10123 4545 10117 4523 10092 4521 10125
4537 10131 4545 10131
TIME...MOT...LOC 0451Z 320DEG 27KT 4536 10119
HAIL...1.75IN
WIND...60MPH
$$
Connelly250
WWUS53 KABR 090513
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
1113 PM MDT Thu Jul 8 2021
SDC041-090523-
/O.EXP.KABR.SV.W.0055.000000T0000Z-210709T0515Z/
Dewey SD-
1113 PM MDT Thu Jul 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DEWEY COUNTY WILL
EXPIRE AT 1115 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 200 AM MDT for
north central South Dakota.
LAT...LON 4546 10123 4545 10117 4523 10092 4521 10125
4537 10131 4545 10131
TIME...MOT...LOC 0513Z 327DEG 31KT 4521 10105
$$
TDKThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 8:35 PM MDT | Severe Thunderstorm Warning | ABR | Dewey | 26 min |
| Jul 8, 9:45 PM MDT | Severe Thunderstorm Warning | ABR | Corson | 45 min |
| Jul 9, 1:46 AM MDT | Special Weather Statement | ABR | Dewey | 44 min |
| Jul 9, 3:17 AM MDT | Severe Thunderstorm Warning | ABR | Dewey, Sully | 27 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.