Alert archive / South Dakota / Tornado Watches in 2010
Tornado Watch 202
The Storm Prediction Center issued this tornado watch at May 22, 2010, 5:10 PM CDT for 11 counties in North Dakota; 18 counties in South Dakota. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- May 22, 2010, 5:10 PM CDT (22:10 UTC)
- Expired
- May 23, 2010, 1:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 4 in
- Strongest gust expected
- 60 kt
All 29 counties
Barnes County, ND, Dickey County, ND, Emmons County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Stutsman County, ND, Brown County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Sully County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 71 km from the middle of the area, began a volume at 22:10 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 70%
- One or more EF2 to EF5 tornadoes
- 40%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 80%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
33 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 5:18 PM CDT | Tornado Warning | ABR | Potter, Walworth | 42 min |
| May 22, 5:55 PM CDT | Tornado Warning | ABR | Walworth | 50 min |
| May 22, 6:23 PM CDT | Tornado Warning | ABR | Campbell, Edmunds, McPherson, Walworth | 52 min |
| May 22, 6:29 PM CDT | Severe Thunderstorm Warning | ABR | Campbell | 28 min |
| May 22, 6:38 PM CDT | Severe Thunderstorm Warning | BIS | Emmons, Logan, McIntosh | 42 min |
| May 22, 7:11 PM CDT | Tornado Warning | ABR | Edmunds, McPherson | 49 min |
| May 22, 7:32 PM CDT | Severe Thunderstorm Warning | ABR | Faulk, Hand, Hyde, Sully | 58 min |
| May 22, 7:33 PM CDT | Severe Thunderstorm Warning | BIS | Emmons, Kidder, Logan | 57 min |
| May 22, 7:34 PM CDT | Tornado Warning | ABR | Edmunds, McPherson | 41 min |
| May 22, 7:45 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, Faulk | 30 min |
| May 22, 7:50 PM CDT | Severe Thunderstorm Warning | BIS | Emmons, Kidder, Logan, McIntosh, Stutsman | 55 min |
| May 22, 7:54 PM CDT | Tornado Warning | ABR | Edmunds, Faulk, Hyde, Potter, Sully, Walworth | 51 min |
| May 22, 7:55 PM CDT | Severe Thunderstorm Warning | BIS | Dickey, LaMoure, McIntosh | 50 min |
| May 22, 8:05 PM CDT | Tornado Warning | ABR | Brown, Edmunds, McPherson | 25 min |
| May 22, 8:14 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, Faulk, Spink | 46 min |
| May 22, 8:21 PM CDT | Tornado Warning | ABR | Faulk, Hand, Hyde, Spink | 54 min |
| May 22, 8:28 PM CDT | Tornado Warning | ABR | Brown, Edmunds, McPherson | 47 min |
| May 22, 8:48 PM CDT | Severe Thunderstorm Warning | ABR | Potter, Sully | 27 min |
| May 22, 8:55 PM CDT | Flash Flood Warning | ABR | Brown, Edmunds, Faulk, McPherson, Marshall, Spink | 3 hr |
| May 22, 9:02 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Day, Edmunds, Faulk, Hand, McPherson and 2 more | 58 min |
| May 22, 9:05 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Griggs, Steele | 55 min |
| May 22, 9:13 PM CDT | Severe Thunderstorm Warning | BIS | LaMoure, Stutsman | 32 min |
| May 22, 9:15 PM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Hand, Hughes, Hyde, Lyman | 31 min |
| May 22, 9:21 PM CDT | Severe Thunderstorm Warning | BIS | Dickey | 54 min |
| May 22, 9:26 PM CDT | Severe Thunderstorm Warning | BIS | Stutsman | 49 min |
| May 22, 9:32 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Sargent | 58 min |
| May 22, 9:59 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Sargent | 61 min |
| May 22, 10:00 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Day, Faulk, Hand, Marshall, Spink | 60 min |
| May 22, 10:45 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Clark, Codington, Day, Grant, Hamlin and 3 more | 60 min |
| May 22, 11:08 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Richland, Sargent | 67 min |
| May 22, 11:36 PM CDT | Severe Thunderstorm Warning | FGF | Richland, Sargent | 54 min |
| May 22, 11:49 PM CDT | Severe Thunderstorm Warning | ABR | Day, Marshall, Roberts | 71 min |
| May 23, 12:16 AM CDT | Severe Thunderstorm Warning | FGF | Richland | 59 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, 10.2 hours before the alert went out and 127 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
- 945 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 463 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 1:51 PM CDT | Mesoscale Discussion | SPC | Adams, Billings, Bowman, Burleigh, Dunn, Emmons and 15 more | 84 min |
| May 21, 10:07 PM CDT | Mesoscale Discussion | SPC | Custer, Fall River, Oglala Lakota, Pennington | 53 min |
| May 21, 10:58 PM CDT | Severe Thunderstorm Watch | SPC | Custer, Fall River | 3 hr |
| May 22, 1:41 AM CDT | Mesoscale Discussion | SPC | Bennett, Haakon, Jackson, Jones, Mellette, Oglala Lakota | 64 min |
| May 22, 3:09 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Fall River, Oglala Lakota, Pennington | 96 min |
Nearby
Tornado Watches in South Dakota, 2010Tornado Watches in North Dakota, 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.