Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 89, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 7, 2021, 11:01 PM CDT for Brown County, Spink County, South Dakota. It was in force for 44 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
- Aug 7, 2021, 11:01 PM CDT (04:01 UTC)
- Expired
- Aug 7, 2021, 11:45 PM CDT
- In force
- 44 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Brown County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 11 km from the middle of the area, began a volume at 04:02 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, 4.0 hours before the alert went out and 55 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.
103 WUUS53 KABR 080401 SVRABR SDC013-115-080445- /O.NEW.KABR.SV.W.0089.210808T0401Z-210808T0445Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Aberdeen SD 1101 PM CDT Sat Aug 7 2021 The National Weather Service in Aberdeen has issued a * Severe Thunderstorm Warning for... Southeastern Brown County in northeastern South Dakota... North central Spink County in northeastern South Dakota... * Until 1145 PM CDT. * At 1101 PM CDT, a severe thunderstorm was located near Bath, or 7 miles southeast of Aberdeen, moving southeast at 20 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * This severe thunderstorm will be near... Stratford around 1110 PM CDT. Other locations in the path of this severe thunderstorm include Ferney. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4542 9845 4555 9844 4541 9799 4517 9817 TIME...MOT...LOC 0401Z 295DEG 19KT 4541 9833 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Wise
1 follow-up statement
157 WWUS53 KABR 080422 SVSABR Severe Weather Statement National Weather Service Aberdeen SD 1122 PM CDT Sat Aug 7 2021 SDC013-115-080445- /O.CON.KABR.SV.W.0089.000000T0000Z-210808T0445Z/ Brown SD-Spink SD- 1122 PM CDT Sat Aug 7 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR SOUTHEASTERN BROWN AND NORTH CENTRAL SPINK COUNTIES... At 1122 PM CDT, a severe thunderstorm was located near Ferney, or 7 miles southwest of Groton, moving southeast at 20 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Groton and Ferney. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4529 9830 4547 9818 4541 9799 4517 9817 TIME...MOT...LOC 0422Z 295DEG 19KT 4536 9819 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Wise
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 7:05 PM CDT | Severe Thunderstorm Warning | ABR | Brown, McPherson | 40 min |
| 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, 11:25 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.