Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 129, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 2021, 6:17 PM CDT for Hutchinson County, McCook County, Turner County, South Dakota. It was in force for 43 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 28, 2021, 6:17 PM CDT (23:17 UTC)
- Expired
- Aug 28, 2021, 7:00 PM CDT
- In force
- 43 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Hutchinson County, SD, McCook County, SD, Turner County, SD
The radar
The Sioux Falls radar (KFSD), 75 km from the middle of the area, began a volume at 23:16 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 28, 6:32 PM CDT | HAIL 0.7 | 5 Se Clayton, SD |
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 |
|---|---|---|---|
| Aug 28, 3:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.3 hours before the alert went out and 186 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
- 9 J/kg
- Mixed-layer CIN
- -334 J/kg
- Mixed-layer LCL
- 1540 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 558 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
096
WUUS53 KFSD 282317
SVRFSD
SDC067-087-125-290000-
/O.NEW.KFSD.SV.W.0129.210828T2317Z-210829T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
617 PM CDT Sat Aug 28 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
South central McCook County in southeastern South Dakota...
Northwestern Turner County in southeastern South Dakota...
Eastern Hutchinson County in southeastern South Dakota...
* Until 700 PM CDT.
* At 617 PM CDT, a severe thunderstorm was located near Menno, or 17
miles southeast of Parkston, moving northeast at 35 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...
Menno around 620 PM CDT.
Freeman around 640 PM CDT.
Dolton around 650 PM CDT.
Marion around 655 PM CDT.
Parker and Monroe around 700 PM CDT.
Other locations impacted by this severe thunderstorm include Olivet.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4332 9786 4361 9733 4339 9709 4317 9766
4317 9772
TIME...MOT...LOC 2317Z 236DEG 32KT 4328 9768
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SG1 follow-up statement
919
WWUS53 KFSD 282352
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
652 PM CDT Sat Aug 28 2021
SDC067-087-125-290001-
/O.EXP.KFSD.SV.W.0129.000000T0000Z-210829T0000Z/
McCook SD-Turner SD-Hutchinson SD-
652 PM CDT Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MCCOOK...
NORTHWESTERN TURNER AND EASTERN HUTCHINSON COUNTIES WILL EXPIRE AT
700 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
southeastern South Dakota.
Remember, a Severe Thunderstorm Warning still remains in effect for
McCook county until 730 PM CDT.
LAT...LON 4332 9786 4361 9733 4339 9709 4317 9766
4317 9772
TIME...MOT...LOC 2351Z 235DEG 43KT 4339 9747
$$
SGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 3:21 PM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook, Miner, Minnehaha, Moody | 24 min |
| Aug 28, 3:56 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner, Yankton | 49 min |
| Aug 28, 4:23 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner | 37 min |
| Aug 28, 4:23 PM CDT | Tornado Warning | FSD | Lincoln, Turner | 37 min |
| Aug 28, 4:33 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 42 min |
| Aug 28, 4:39 PM CDT | Tornado Warning | FSD | Lincoln | 36 min |
| Aug 28, 4:45 PM CDT | Tornado Warning | FSD | Lincoln, Minnehaha | 30 min |
| Aug 28, 5:00 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 45 min |
| Aug 28, 6:14 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, Lake, McCook | 31 min |
| Aug 28, 6:15 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha, Moody | 45 min |
| Aug 28, 6:44 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Lake, McCook, Miner, Sanborn | 46 min |
| Aug 28, 6:44 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 46 min |
| Aug 28, 6:48 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, Lake, McCook, Minnehaha | 42 min |
| Aug 28, 6:53 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 52 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.