Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 120, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 2021, 4:33 PM CDT for Lincoln County, Minnehaha County, 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, 4:33 PM CDT (21:33 UTC)
- Expired
- Aug 28, 2021, 5:15 PM CDT
- In force
- 42 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Lincoln County, SD, Minnehaha County, SD
The radar
The Sioux Falls radar (KFSD), 10 km from the middle of the area, began a volume at 21:37 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, 4:35 PM CDT | TSTM WND GST 55 | 3 Nnw Sioux Falls, SD | DELAYED REPORT. ASOS STATION KFSD SIOUX FALLS AIRPORT. |
| Aug 28, 4:38 PM CDT | TSTM WND DMG | 2 Sse Sioux Falls, SD | DELAYED REPORT FROM SOCIAL MEDIA. LARGE TREE KNOCKED OVER AND ONTO THE FENCE AT SPENCER DOG PARK. |
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, 9.6 hours before the alert went out and 206 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.
569
WUUS53 KFSD 282133
SVRFSD
SDC083-099-282215-
/O.NEW.KFSD.SV.W.0120.210828T2133Z-210828T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
433 PM CDT Sat Aug 28 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Southeastern Minnehaha County in southeastern South Dakota...
Northwestern Lincoln County in southeastern South Dakota...
* Until 515 PM CDT.
* At 432 PM CDT, severe thunderstorms were located along a line
extending from near Crooks to near Tea, moving east 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...
Palisades State Park, Garretson, Brandon, Sherman, Rowena and
Valley Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
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 southwestern
Minnesota.
&&
LAT...LON 4350 9645 4350 9660 4348 9659 4346 9691
4369 9684 4380 9645
TIME...MOT...LOC 2132Z 252DEG 24KT 4366 9674 4351 9684
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
APT1 follow-up statement
374
WWUS53 KFSD 282203
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
503 PM CDT Sat Aug 28 2021
SDC083-282213-
/O.CAN.KFSD.SV.W.0120.000000T0000Z-210828T2215Z/
Lincoln SD-
503 PM CDT Sat Aug 28 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LINCOLN COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area.Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
northwestern Iowa...and southeastern South Dakota.
LAT...LON 4350 9645 4350 9663 4355 9663 4364 9666
4373 9667 4380 9645
TIME...MOT...LOC 2203Z 268DEG 21KT 4372 9648 4357 9658
$$
SDC099-282215-
/O.CON.KFSD.SV.W.0120.000000T0000Z-210828T2215Z/
Minnehaha SD-
503 PM CDT Sat Aug 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN MINNEHAHA COUNTY...
At 503 PM CDT, severe thunderstorms were located along a line
extending from Garretson to Brandon, moving east 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...
Valley Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4350 9645 4350 9663 4355 9663 4364 9666
4373 9667 4380 9645
TIME...MOT...LOC 2203Z 268DEG 21KT 4372 9648 4357 9658
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
APTThe 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, 4:39 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, 6:48 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.