Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 132, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 2021, 6:48 PM CDT for 4 counties in South Dakota. It was in force for 42 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 28, 2021, 6:48 PM CDT (23:48 UTC)
- Expired
- Aug 28, 2021, 7:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Hanson County, SD, Lake County, SD, McCook County, SD, Minnehaha County, SD
The radar
The Sioux Falls radar (KFSD), 47 km from the middle of the area, began a volume at 23:49 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, 6:58 PM CDT | HAIL 1.75 | Salem, SD | |
| Aug 28, 7:20 PM CDT | HAIL 1.75 | 3 S Salem, SD | REPORT FROM SOCIAL MEDIA, HALF DOLLAR TO GOLF BALL SIZE HAIL. |
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, 3:44 PM CDT | Tornado Watch | SPC | 5 hr |
| Aug 28, 3:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 11.8 hours before the alert went out and 159 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.
266
WUUS53 KFSD 282348
SVRFSD
SDC061-079-087-099-290030-
/O.NEW.KFSD.SV.W.0132.210828T2348Z-210829T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
648 PM CDT Sat Aug 28 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
South central Lake County in east central South Dakota...
Northwestern Minnehaha County in southeastern South Dakota...
McCook County in southeastern South Dakota...
Southeastern Hanson County in southeastern South Dakota...
* Until 730 PM CDT.
* At 648 PM CDT, a severe thunderstorm was located over Bridgewater,
or 16 miles west of Lake Vermillion State Recreation Area, moving
northeast at 45 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...
Canistota around 700 PM CDT.
Salem around 705 PM CDT.
Montrose around 715 PM CDT.
Colton around 730 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for east central
South Dakota.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 900 PM CDT for east central
South Dakota.
&&
LAT...LON 4394 9710 4377 9687 4350 9740 4350 9757
4359 9773
TIME...MOT...LOC 2348Z 230DEG 37KT 4357 9750
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SG1 follow-up statement
568
WWUS53 KFSD 290004
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
704 PM CDT Sat Aug 28 2021
SDC061-290013-
/O.CAN.KFSD.SV.W.0132.000000T0000Z-210829T0030Z/
Hanson SD-
704 PM CDT Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HANSON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for east central
South Dakota.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
southeastern South Dakota.
LAT...LON 4394 9710 4377 9687 4356 9736 4364 9760
TIME...MOT...LOC 0003Z 234DEG 39KT 4374 9733
$$
SDC079-087-099-290030-
/O.CON.KFSD.SV.W.0132.000000T0000Z-210829T0030Z/
Lake SD-Minnehaha SD-McCook SD-
704 PM CDT Sat Aug 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR SOUTH CENTRAL LAKE...NORTHWESTERN MINNEHAHA AND CENTRAL MCCOOK
COUNTIES...
At 703 PM CDT, a severe thunderstorm was located near Salem, or 12
miles northwest of Lake Vermillion State Recreation Area, moving
northeast at 45 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters. At 658 PM golf ball sized hail
was reported in Salem.
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...
Montrose.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for east central
South Dakota.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4394 9710 4377 9687 4356 9736 4364 9760
TIME...MOT...LOC 0003Z 234DEG 39KT 4374 9733
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
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, 6:17 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, McCook, Turner | 43 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, 6:53 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.