Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 133, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 2021, 6:53 PM CDT for Rock County, Minnesota; Lincoln County, Minnehaha County, South Dakota; Lyon County, Iowa. It was in force for 52 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, 6:53 PM CDT (23:53 UTC)
- Expired
- Aug 28, 2021, 7:45 PM CDT
- In force
- 52 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Lyon County, IA, Rock County, MN, Lincoln County, SD, Minnehaha County, SD
The radar
The Sioux Falls radar (KFSD), 12 km from the middle of the area, began a volume at 23:55 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, 6:55 PM CDT | HAIL 1 | 1 W Harrisburg, SD | REPORT FROM MPING: QUARTER (1.00 IN.). |
| Aug 28, 6:55 PM CDT | HAIL 1 | Harrisburg, SD | REPORT FROM MPING: QUARTER (1.00 IN.). |
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, 11.9 hours before the alert went out and 208 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.
306
WUUS53 KFSD 282353
SVRFSD
IAC119-MNC133-SDC083-099-290045-
/O.NEW.KFSD.SV.W.0133.210828T2353Z-210829T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
653 PM CDT Sat Aug 28 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Northwestern Lyon County in northwestern Iowa...
Western Rock County in southwestern Minnesota...
Eastern Minnehaha County in southeastern South Dakota...
Northern Lincoln County in southeastern South Dakota...
* Until 745 PM CDT.
* At 653 PM CDT, a severe thunderstorm was located over Harrisburg,
or 7 miles south of Sioux Falls, moving northeast at 40 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...
Sioux Falls and Rowena around 705 PM CDT.
Other locations in the path of this severe thunderstorm include
Brandon, Valley Springs, Palisades State Park, Garretson and Sherman.
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 4333 9659 4340 9685 4384 9679 4384 9615
TIME...MOT...LOC 2353Z 204DEG 36KT 4344 9672
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kalin1 follow-up statement
280
WWUS53 KFSD 290006
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
706 PM CDT Sat Aug 28 2021
IAC119-MNC133-SDC083-099-290045-
/O.CON.KFSD.SV.W.0133.000000T0000Z-210829T0045Z/
Lyon IA-Rock MN-Minnehaha SD-Lincoln SD-
706 PM CDT Sat Aug 28 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHWESTERN LYON...WESTERN ROCK...EASTERN MINNEHAHA AND NORTHERN
LINCOLN COUNTIES...
At 705 PM CDT, a severe thunderstorm was located near Rowena, or near
Sioux Falls, moving northeast at 40 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Brandon, Valley Springs, Garretson, Beaver Creek, Palisades State
Park, Sherman and Hardwick.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4333 9659 4340 9685 4384 9679 4384 9615
TIME...MOT...LOC 0005Z 218DEG 34KT 4354 9662
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KalinThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 4:45 PM CDT | Tornado Warning | FSD | Rock | 30 min |
| Aug 28, 4:49 PM CDT | Severe Thunderstorm Warning | FSD | Nobles, Rock | 41 min |
| Aug 28, 5:00 PM CDT | Severe Thunderstorm Warning | FSD | Nobles, Rock | 45 min |
| Aug 28, 5:06 PM CDT | Tornado Warning | FSD | Murray, Nobles, Pipestone, Rock | 24 min |
| Aug 28, 5:24 PM CDT | Tornado Warning | FSD | Nobles | 36 min |
| Aug 28, 5:26 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles, Pipestone, Rock | 34 min |
| Aug 28, 5:26 PM CDT | Tornado Warning | FSD | Cottonwood, Murray | 34 min |
| Aug 28, 5:29 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles, Pipestone, Rock | 31 min |
| Aug 28, 5:34 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 17 min |
| Aug 28, 5:43 PM CDT | Tornado Warning | FSD | Cottonwood, Murray | 32 min |
| Aug 28, 5:45 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 45 min |
| Aug 28, 5:49 PM CDT | Tornado Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 26 min |
| Aug 28, 6:01 PM CDT | Tornado Warning | FSD | Cottonwood | 30 min |
| Aug 28, 6:15 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone, Rock | 45 min |
| 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, 6:14 PM CDT | Severe Thunderstorm Warning | FSD | Hanson, Lake, McCook | 31 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 |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2021Severe Thunderstorm Warnings in Minnesota, 2021Severe Thunderstorm Warnings in Iowa, 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.