Alert archive / South Dakota / Tornado Warnings in 2021
Tornado Warning 10, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Aug 28, 2021, 4:45 PM CDT for Rock County, Minnesota; Lincoln County, Minnehaha County, South Dakota; Lyon County, Iowa. It was in force for 30 min. 4 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, 4:45 PM CDT (21:45 UTC)
- Expired
- Aug 28, 2021, 5:15 PM CDT
- In force
- 30 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Lyon County, IA, Rock County, MN, Lincoln County, SD, Minnehaha County, SD
The radar
The Sioux Falls radar (KFSD), 22 km from the middle of the area, began a volume at 21:44 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, 4:45 PM CDT | FUNNEL CLOUD | 2 E Harrisburg, SD | ROTATION NOTICED IN CLOUDS OVERHEAD, AND SURFACE WINDS SEEMED TO BE BLOWING UPWARD. |
| Aug 28, 4:45 PM CDT | TSTM WND GST 70 | 2 E Harrisburg, SD | BRANCHES ON COTTONWOOD TREE BLOWN UPWARD AND OFF, LANDING ON ROOF OF HOUSE. |
| Aug 28, 5:00 PM CDT | TSTM WND GST 61 | 3 Wsw Luverne, MN | DELAYED REPORT FROM MESONET STATION FW5856 LUVERNE. |
| Aug 28, 5:03 PM CDT | TSTM WND GST 61 | 1 Wsw Luverne, MN | DELAYED REPORT FROM PERSONAL WEATHER STATION JUST WEST OF LUVERNE, MN. |
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, 9.8 hours before the alert went out and 218 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.
523
WFUS53 KFSD 282145
TORFSD
IAC119-MNC133-SDC083-099-282215-
/O.NEW.KFSD.TO.W.0010.210828T2145Z-210828T2215Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
445 PM CDT Sat Aug 28 2021
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Northwestern Lyon County in northwestern Iowa...
Southwestern Rock County in southwestern Minnesota...
Southeastern Minnehaha County in southeastern South Dakota...
North central Lincoln County in southeastern South Dakota...
* Until 515 PM CDT.
* At 444 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Lake Alvin State Recreation Area, or 7 miles
southeast of Sioux Falls, moving east at 40 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Rowena around 455 PM CDT.
Larchwood and Valley Springs around 500 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Hills, Lester and Beaver Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4342 9670 4349 9671 4367 9620 4346 9616
TIME...MOT...LOC 2144Z 251DEG 37KT 4345 9665
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Kalin1 follow-up statement
086
WWUS53 KFSD 282202
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
502 PM CDT Sat Aug 28 2021
SDC083-099-282211-
/O.CAN.KFSD.TO.W.0010.000000T0000Z-210828T2215Z/
Minnehaha SD-Lincoln SD-
502 PM CDT Sat Aug 28 2021
...THE TORNADO WARNING FOR SOUTHEASTERN MINNEHAHA AND NORTH CENTRAL
LINCOLN COUNTIES IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for southwestern
Minnesota.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
northwestern Iowa.
LAT...LON 4346 9643 4357 9644 4367 9620 4346 9616
TIME...MOT...LOC 2201Z 251DEG 58KT 4354 9626
$$
IAC119-MNC133-282215-
/O.CON.KFSD.TO.W.0010.000000T0000Z-210828T2215Z/
Lyon IA-Rock MN-
502 PM CDT Sat Aug 28 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR NORTH
CENTRAL LYON AND SOUTHWESTERN ROCK COUNTIES...
At 501 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Hills, or 7 miles south of Luverne, moving east at
65 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Luverne around 505 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4346 9643 4357 9644 4367 9620 4346 9616
TIME...MOT...LOC 2201Z 251DEG 58KT 4354 9626
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
KalinThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 6:53 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 52 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
Tornado Warnings in South Dakota, 2021Tornado Warnings in Minnesota, 2021Tornado Warnings in Iowa, 2021Every tornado warning in 2021Tornadoes 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.