Alert archive / South Dakota / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 400
The Storm Prediction Center issued this severe thunderstorm watch at May 29, 2011, 10:58 PM CDT for 6 counties in Iowa; 22 counties in Minnesota; 30 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 29, 2011, 10:58 PM CDT (03:58 UTC)
- Expired
- May 30, 2011, 5:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 50 kt
All 58 counties
Dickinson County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Brown County, MN, Chippewa County, MN, Cottonwood County, MN, Jackson County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Sibley County, MN, Swift County, MN, Watonwan County, MN, Yellow Medicine County, MN, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 90 km from the middle of the area, began a volume at 04:02 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 10%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 11:03 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 42 min |
| May 29, 11:30 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, Turner | 45 min |
| May 29, 11:39 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Douglas, Gregory, Hutchinson, Turner and 1 more | 36 min |
| May 30, 12:14 AM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix, Douglas, Hutchinson, Turner, Yankton | 31 min |
| May 30, 12:53 AM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson, Miner, Sanborn | 37 min |
| May 30, 1:46 AM CDT | Severe Thunderstorm Warning | FSD | Beadle, Jerauld | 44 min |
| May 30, 2:16 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Murray, Nobles | 44 min |
| May 30, 2:39 AM CDT | Severe Thunderstorm Warning | FSD | Beadle | 36 min |
| May 30, 2:55 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood | 35 min |
| May 30, 2:55 AM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 50 min |
| May 30, 3:13 AM CDT | Severe Thunderstorm Warning | ABR | Clark, Codington, Spink | 37 min |
| May 30, 3:36 AM CDT | Severe Thunderstorm Warning | FSD | Brookings | 39 min |
| May 30, 3:42 AM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod, Meeker, Wright | 51 min |
| May 30, 4:35 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 40 min |
| May 30, 4:38 AM CDT | Severe Thunderstorm Warning | ABR | Day, Grant, Marshall, Roberts | 20 min |
| May 30, 4:51 AM CDT | Severe Thunderstorm Warning | MPX | McLeod, Meeker, Renville, Sibley, Wright | 54 min |
| May 30, 4:56 AM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville, Yellow Medicine | 64 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 7:16 PM CDT | Tornado Watch | SPC | Fremont, Harrison, Mills, Montgomery, Pottawattamie, Shelby | 4 hr |
| May 29, 9:24 PM CDT | Mesoscale Discussion | SPC | Audubon, Crawford, Harrison, Ida, Mills, Monona and 5 more | 96 min |
| May 30, 2:52 AM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 30 more | 113 min |
| May 30, 4:05 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Big Stone, Chippewa, Chisago, Douglas, Grant and 19 more | 5 hr |
| May 30, 6:51 AM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Carlton, Chisago, Hennepin, Isanti and 9 more | 114 min |
| May 30, 1:40 PM CDT | Mesoscale Discussion | SPC | Big Stone, Lac qui Parle, Lincoln, Pipestone, Traverse | 95 min |
| May 30, 2:08 PM CDT | Tornado Watch | SPC | Lincoln, Lyon, Pipestone, Rock | 7 hr |
| May 30, 3:52 PM CDT | Tornado Watch | SPC | Becker, Benton, Big Stone, Cass, Chippewa, Clay and 25 more | 7 hr |
| May 30, 6:17 PM CDT | Mesoscale Discussion | SPC | Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 22 more | 118 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2011Severe Thunderstorm Watches in Minnesota, 2011Severe Thunderstorm Watches in Iowa, 2011Every severe thunderstorm watch in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.