Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 160, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Sep 17, 2021, 12:10 AM CDT for 5 counties in South Dakota; Lincoln County, Pipestone County, Rock County, Minnesota. It was in force for 35 min. 6 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
- Sep 17, 2021, 12:10 AM CDT (05:10 UTC)
- Expired
- Sep 17, 2021, 12:45 AM CDT
- In force
- 35 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Lincoln County, MN, Pipestone County, MN, Rock County, MN, Brookings County, SD, Lake County, SD, McCook County, SD, Minnehaha County, SD, Moody County, SD
The radar
The Sioux Falls radar (KFSD), 42 km from the middle of the area, began a volume at 05:10 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 |
|---|---|---|---|
| Sep 17, 12:12 AM CDT | TSTM WND DMG | Crooks, SD | SEVERAL ROWS OF SHINGLES BLOWN OFF OF HOUSE AND GARAGE. NEIGHBOR ALSO HAD LARGE TREE BLOWN DOWN IN FRONT YARD. |
| Sep 17, 12:15 AM CDT | TSTM WND GST 73 | 3 Se Baltic, SD | MESONET STATION BTCS2 BALTIC 3 SE (SD MESONET). |
| Sep 17, 12:19 AM CDT | TSTM WND DMG | 4 S Colton, SD | REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF. |
| Sep 17, 12:20 AM CDT | TSTM WND GST 64 | 10 Ssw Aurora, SD | MESONET STATION 224 SD RWIS WARD. |
| Sep 17, 12:30 AM CDT | TSTM WND GST 60 | 1 Nnw Pipestone, MN | MESONET STATION RPPM5 REDSTONE RAWS. |
| Sep 17, 12:37 AM CDT | TSTM WND GST 59 | 1 Wsw Beaver Creek, MN | MESONET STATION MN006 BEAVER CREEK I-90 MILE POST 4. |
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 00:00Z, 5.2 hours before the alert went out and 185 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
- 1789 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- -170 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
371
WUUS53 KFSD 170510
SVRFSD
MNC081-117-133-SDC011-079-087-099-101-170545-
/O.NEW.KFSD.SV.W.0160.210917T0510Z-210917T0545Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
1210 AM CDT Fri Sep 17 2021
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Southern Lincoln County in southwestern Minnesota...
Northwestern Rock County in southwestern Minnesota...
Pipestone County in southwestern Minnesota...
Moody County in east central South Dakota...
Southeastern Lake County in east central South Dakota...
Minnehaha County in southeastern South Dakota...
Southeastern McCook County in southeastern South Dakota...
Southeastern Brookings County in east central South Dakota...
* Until 1245 AM CDT.
* At 1210 AM CDT, severe thunderstorms were located along a line
extending from 6 miles south of Aurora to near Colman to near
Hartford, moving east at 55 mph.
HAZARD...70 mph wind gusts. The strongest gusts are occurring
ahead of the main line of storms.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Severe thunderstorms will be near...
Aurora around 1215 AM CDT.
Baltic, Egan and Trent around 1220 AM CDT.
Elkton and Ward around 1225 AM CDT.
Brandon, Jasper and Palisades State Park around 1230 AM CDT.
Garretson, Lake Benton and Sherman around 1235 AM CDT.
Pipestone, Beaver Creek, Trosky and Pipestone National Monument
around 1240 AM CDT.
Tyler and Holland around 1245 AM CDT.
Other locations impacted by these severe thunderstorms include Ihlen
and Flandreau Santee Sioux Tribal Nation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4394 9623 4355 9640 4353 9720 4425 9687
4438 9609
TIME...MOT...LOC 0510Z 259DEG 47KT 4418 9671 4390 9681 4366 9692
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
SGThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 10:20 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 25 min |
| Sep 16, 11:31 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Hutchinson, Yankton | 29 min |
| Sep 17, 12:29 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln, Turner, Union, Yankton | 46 min |
| Sep 17, 12:34 AM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 56 min |
| Sep 17, 12:36 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha | 54 min |
| Sep 17, 1:11 AM CDT | Severe Thunderstorm Warning | FSD | Union | 49 min |
| Sep 17, 1:21 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Lyon, Murray, Nobles | 39 min |
| Sep 17, 1:23 AM CDT | Severe Thunderstorm Warning | FSD | Jackson, Nobles | 67 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2021Severe Thunderstorm Warnings in Minnesota, 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.