Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 147, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 30, 2021, 5:30 PM CDT for Hanson County, Hutchinson County, McCook County, South Dakota. It was in force for 30 min. 2 reports 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 30, 2021, 5:30 PM CDT (22:30 UTC)
- Expired
- Aug 30, 2021, 6:00 PM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Hanson County, SD, Hutchinson County, SD, McCook County, SD
The radar
The Sioux Falls radar (KFSD), 80 km from the middle of the area, began a volume at 22:33 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 30, 5:38 PM CDT | HAIL 1.25 | 2 W Clayton, SD | HAIL UP TO THE SIZE OF HALF DOLLARS, AND VERY LITTLE RAINFALL. |
| Aug 30, 5:48 PM CDT | HAIL 1 | 1 S Clayton, 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 12:00Z, 10.5 hours before the alert went out and 171 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1772 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
258
WUUS53 KFSD 302230
SVRFSD
SDC061-067-087-302300-
/O.NEW.KFSD.SV.W.0147.210830T2230Z-210830T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
530 PM CDT Mon Aug 30 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Southwestern McCook County in southeastern South Dakota...
Southeastern Hanson County in southeastern South Dakota...
Northeastern Hutchinson County in southeastern South Dakota...
* Until 600 PM CDT.
* At 529 PM CDT, a severe thunderstorm was located near Milltown, or
12 miles northeast of Parkston, moving southeast at 25 mph.
HAZARD...60 mph wind gusts and half dollar 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...
Clayton around 545 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4344 9786 4357 9777 4351 9741 4327 9760
TIME...MOT...LOC 2229Z 296DEG 20KT 4347 9776
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BP1 follow-up statement
395
WWUS53 KFSD 302246
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
546 PM CDT Mon Aug 30 2021
SDC061-087-302255-
/O.CAN.KFSD.SV.W.0147.000000T0000Z-210830T2300Z/
McCook SD-Hanson SD-
546 PM CDT Mon Aug 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MCCOOK AND
SOUTHEASTERN HANSON COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4341 9779 4350 9770 4350 9742 4329 9759
TIME...MOT...LOC 2245Z 296DEG 20KT 4343 9765
$$
SDC067-302300-
/O.CON.KFSD.SV.W.0147.000000T0000Z-210830T2300Z/
Hutchinson SD-
546 PM CDT Mon Aug 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR NORTHEASTERN HUTCHINSON COUNTY...
At 545 PM CDT, a severe thunderstorm was located over Clayton, or 17
miles east of Parkston, moving southeast at 25 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Trained weather spotters reported half dollar sized hail
west of Clayton at 538 PM.
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
northeastern Hutchinson County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4341 9779 4350 9770 4350 9742 4329 9759
TIME...MOT...LOC 2245Z 296DEG 20KT 4343 9765
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BPThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 4:19 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Hutchinson | 56 min |
| Aug 30, 5:25 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner | 35 min |
| Aug 30, 5:59 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner, Yankton | 23 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.