Alert archive / South Dakota / Tornado Watches in 2010
Tornado Watch 216
The Storm Prediction Center issued this tornado watch at May 24, 2010, 2:33 PM CDT for Big Stone County, Traverse County, Minnesota; 10 counties in Nebraska; 22 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 24, 2010, 2:33 PM CDT (19:33 UTC)
- Expired
- May 24, 2010, 7:37 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 34 counties
Big Stone County, MN, Traverse County, MN, Blaine County, NE, Boyd County, NE, Brown County, NE, Custer County, NE, Garfield County, NE, Holt County, NE, Keya Paha County, NE, Loup County, NE, Rock County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Brown County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Jerauld County, SD, Kingsbury County, SD, Marshall County, SD, Miner County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 135 km from the middle of the area, began a volume at 19:33 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
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 24, 2:47 PM CDT | Tornado Warning | LBF | Boyd, Keya Paha | 13 min |
| May 24, 2:54 PM CDT | Tornado Warning | FSD | Gregory | 36 min |
| May 24, 2:59 PM CDT | Tornado Warning | LBF | Brown, Cherry | 46 min |
| May 24, 3:19 PM CDT | Severe Thunderstorm Warning | FSD | Brule | 26 min |
| May 24, 3:21 PM CDT | Tornado Warning | LBF | Keya Paha | 15 min |
| May 24, 3:26 PM CDT | Tornado Warning | LBF | Keya Paha, Rock | 19 min |
| May 24, 3:27 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 48 min |
| May 24, 3:42 PM CDT | Tornado Warning | LBF | Brown, Cherry, Keya Paha | 33 min |
| May 24, 3:52 PM CDT | Tornado Warning | LBF | Keya Paha, Rock | 24 min |
| May 24, 4:12 PM CDT | Tornado Warning | LBF | Blaine, Brown, Custer, Loup, Rock | 35 min |
| May 24, 4:47 PM CDT | Severe Thunderstorm Warning | ABR | Faulk, Hand, Spink | 43 min |
| May 24, 5:12 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, Faulk | 33 min |
| May 24, 5:37 PM CDT | Severe Thunderstorm Warning | ABR | Faulk, Spink | 3 min |
| May 24, 6:43 PM CDT | Severe Thunderstorm Warning | LBF | Blaine, Cherry, Hooker, Logan, McPherson, Thomas | 32 min |
| May 24, 7:07 PM CDT | Severe Thunderstorm Warning | LBF | Custer, Frontier, Lincoln, Logan | 53 min |
| May 24, 7:20 PM CDT | Severe Thunderstorm Warning | LBF | Blaine, Thomas | 55 min |
| May 24, 7:26 PM CDT | Severe Thunderstorm Warning | LBF | Brown, Cherry, Keya Paha, Rock | 64 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 7.6 hours before the alert went out and 75 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
- 224 J/kg
- Mixed-layer CIN
- -383 J/kg
- Mixed-layer LCL
- 1830 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 526 m²/s²
- 0-3 km storm-relative helicity
- 528 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 9:11 PM CDT | Mesoscale Discussion | SPC | Benton, Carlton, Kanabec, Lake, McLeod, Meeker and 3 more | 64 min |
| May 24, 1:37 AM CDT | Mesoscale Discussion | SPC | Big Stone, Grant, Lac qui Parle, Otter Tail, Stevens, Traverse and 1 more | 83 min |
| May 24, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | Becker, Big Stone, Clay, Clearwater, Grant, Hubbard and 7 more | 7 hr |
| May 24, 4:21 AM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Big Stone, Cass, Clay, Clearwater and 14 more | 54 min |
| May 24, 7:50 AM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Cass, Clearwater, Hubbard, Itasca and 5 more | 55 min |
| May 24, 1:37 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Mahnomen, Marshall and 4 more | 53 min |
| May 24, 2:03 PM CDT | Tornado Watch | SPC | Becker, Beltrami, Clay, Clearwater, Lake of the Woods, Mahnomen and 7 more | 8 hr |
| May 23, 7:39 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Chase, Custer, Dawson, Frontier and 9 more | 66 min |
| May 23, 7:50 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Boyd, Brown, Buffalo, Chase and 24 more | 4 hr |
| May 23, 8:12 PM CDT | Mesoscale Discussion | SPC | Dundy, Hitchcock, Red Willow | 93 min |
| May 23, 11:12 PM CDT | Mesoscale Discussion | SPC | Blaine, Brown, Custer, Hayes, Holt, Hooker and 6 more | 2 hr |
| May 23, 11:39 PM CDT | Severe Thunderstorm Watch | SPC | Box Butte, Dawes, Scotts Bluff, Sioux | 5 hr |
| May 23, 11:54 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Boyd, Brown, Chase, Cherry and 21 more | 4 hr |
| May 24, 6:06 AM CDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Brown, Cherry, Dawes, Garden and 6 more | 114 min |
| May 24, 10:44 AM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Chase, Cheyenne, Deuel, Dundy and 6 more | 91 min |
| May 24, 11:46 AM CDT | Tornado Watch | SPC | Dundy, Hitchcock, Red Willow | 10 hr |
| May 24, 11:55 AM CDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Cherry, Cheyenne, Dawes, Garden and 4 more | 95 min |
| May 24, 12:21 PM CDT | Tornado Watch | SPC | Arthur, Banner, Box Butte, Chase, Cherry, Cheyenne and 18 more | 9 hr |
| May 24, 3:33 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cherry, Cheyenne, Dawes and 11 more | 57 min |
| May 24, 3:47 PM CDT | Mesoscale Discussion | SPC | Chase, Deuel, Dundy, Frontier, Garden, Hayes and 5 more | 88 min |
| May 24, 6:03 PM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Blaine, Boone, Boyd, Brown and 21 more | 87 min |
| May 23, 10:19 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bennett, Brule, Buffalo, Davison and 18 more | 86 min |
Nearby
Tornado Watches in South Dakota, 2010Tornado Watches in Nebraska, 2010Tornado Watches in Minnesota, 2010Every tornado watch in 2010
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.