Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 2, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at May 21, 2021, 2:33 AM CDT for Hughes County, Stanley County, Sully County, South Dakota. It was in force for 42 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
- May 21, 2021, 2:33 AM CDT (07:33 UTC)
- Expired
- May 21, 2021, 3:15 AM CDT
- In force
- 42 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hughes County, SD, Stanley County, SD, Sully County, SD
The radar
The Aberdeen radar (KABR), 189 km from the middle of the area, began a volume at 07:34 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, 7.6 hours before the alert went out and 164 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
- 184 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1723 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
471
WUUS53 KABR 210733
SVRABR
SDC065-117-119-210815-
/O.NEW.KABR.SV.W.0002.210521T0733Z-210521T0815Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Aberdeen SD
233 AM CDT Fri May 21 2021
The National Weather Service in Aberdeen has issued a
* Severe Thunderstorm Warning for...
South central Sully County in central South Dakota...
Central Stanley County in central South Dakota...
Northwestern Hughes County in central South Dakota...
* Until 315 AM CDT/215 AM MDT/.
* At 233 AM CDT/133 AM MDT/, a severe thunderstorm was located over
southern Lake Oahe, or 7 miles northwest of Fort Pierre, moving
northeast at 35 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 be near...
Southern Lake Oahe and Overlook Rec Area around 240 AM CDT.
Grey Goose, Spring Creek Rec Area, Cow Creek Rec Area and Okobojo
Point Rec Area around 245 AM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4436 10046 4442 10060 4478 10037 4461 10013
TIME...MOT...LOC 0733Z 210DEG 29KT 4444 10048
HAIL...1.00IN
WIND...60MPH
$$
TDK2 follow-up statements
021
WWUS53 KABR 210752
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
252 AM CDT Fri May 21 2021
SDC117-210801-
/O.CAN.KABR.SV.W.0002.000000T0000Z-210521T0815Z/
Stanley SD-
252 AM CDT Fri May 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL STANLEY COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4443 10036 4451 10049 4478 10037 4462 10014
4449 10028
TIME...MOT...LOC 0751Z 214DEG 23KT 4449 10040
$$
SDC065-119-210815-
/O.CON.KABR.SV.W.0002.000000T0000Z-210521T0815Z/
Sully SD-Hughes SD-
252 AM CDT Fri May 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM CDT
FOR SOUTH CENTRAL SULLY AND NORTHWESTERN HUGHES COUNTIES...
At 251 AM CDT, a severe thunderstorm was located over Overlook Rec
Area, or 8 miles north of Fort Pierre, moving northeast at 25 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...
Grey Goose.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4443 10036 4451 10049 4478 10037 4462 10014
4449 10028
TIME...MOT...LOC 0751Z 214DEG 23KT 4449 10040
HAIL...1.00IN
WIND...60MPH
$$
TDK513
WWUS53 KABR 210812
SVSABR
Severe Weather Statement
National Weather Service Aberdeen SD
312 AM CDT Fri May 21 2021
SDC065-119-210822-
/O.EXP.KABR.SV.W.0002.000000T0000Z-210521T0815Z/
Sully SD-Hughes SD-
312 AM CDT Fri May 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL SULLY AND
NORTHWESTERN HUGHES COUNTIES WILL EXPIRE AT 315 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
is still possible with this thunderstorm.
LAT...LON 4443 10036 4451 10049 4478 10037 4462 10014
4449 10028
TIME...MOT...LOC 0812Z 210DEG 29KT 4462 10030
$$
TDKThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 1:53 AM CDT | Special Weather Statement | ABR | Stanley | 52 min |
| May 21, 2:28 AM CDT | Special Weather Statement | ABR | Sully | 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.