Alert archive / South Dakota / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 327
The Storm Prediction Center issued this severe thunderstorm watch at Jun 21, 2015, 10:41 PM CDT for 9 counties in Minnesota; 19 counties in North Dakota; 33 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 21, 2015, 10:41 PM CDT (03:41 UTC)
- Expired
- Jun 22, 2015, 5:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 61 counties
Becker County, MN, Big Stone County, MN, Clay County, MN, Grant County, MN, Norman County, MN, Otter Tail County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Adams County, ND, Barnes County, ND, Bowman County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, Griggs County, ND, Hettinger County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Slope County, ND, Steele County, ND, Traill County, ND, Brown County, SD, Buffalo County, SD, Butte County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Haakon County, SD, Hamlin County, SD, Hand County, SD, Harding County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Meade County, SD, Perkins County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Bismarck radar (KBIS), 77 km from the middle of the area, began a volume at 03:41 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
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
38 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 10:49 PM CDT | Severe Thunderstorm Warning | BIS | Dickey, McIntosh | 56 min |
| Jun 21, 10:59 PM CDT | Severe Thunderstorm Warning | UNR | Harding, Perkins | 61 min |
| Jun 21, 11:03 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, McPherson | 42 min |
| Jun 21, 11:16 PM CDT | Severe Thunderstorm Warning | BIS | Adams, Bowman, Hettinger, Slope | 59 min |
| Jun 21, 11:29 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, McPherson | 46 min |
| Jun 21, 11:41 PM CDT | Severe Thunderstorm Warning | UNR | Harding, Perkins | 64 min |
| Jun 21, 11:53 PM CDT | Severe Thunderstorm Warning | UNR | Butte | 52 min |
| Jun 22, 12:13 AM CDT | Severe Thunderstorm Warning | ABR | Brown | 47 min |
| Jun 22, 12:16 AM CDT | Severe Thunderstorm Warning | UNR | Butte, Lawrence, Meade | 44 min |
| Jun 22, 12:20 AM CDT | Severe Thunderstorm Warning | ABR | Corson | 55 min |
| Jun 22, 12:25 AM CDT | Severe Thunderstorm Warning | UNR | Butte, Lawrence | 35 min |
| Jun 22, 12:37 AM CDT | Severe Thunderstorm Warning | ABR | Brown, Day | 38 min |
| Jun 22, 12:41 AM CDT | Severe Thunderstorm Warning | UNR | Perkins, Ziebach | 49 min |
| Jun 22, 12:56 AM CDT | Severe Thunderstorm Warning | UNR | Butte, Meade, Pennington | 64 min |
| Jun 22, 1:02 AM CDT | Severe Thunderstorm Warning | ABR | Brown, McPherson | 23 min |
| Jun 22, 1:04 AM CDT | Severe Thunderstorm Warning | ABR | Dewey | 41 min |
| Jun 22, 1:08 AM CDT | Severe Thunderstorm Warning | UNR | Lawrence, Meade, Pennington | 22 min |
| Jun 22, 1:15 AM CDT | Severe Thunderstorm Warning | ABR | Campbell, Corson, Walworth | 45 min |
| Jun 22, 1:23 AM CDT | Severe Thunderstorm Warning | UNR | Haakon, Jackson | 22 min |
| Jun 22, 1:25 AM CDT | Severe Thunderstorm Warning | ABR | Jones, Lyman | 50 min |
| Jun 22, 1:30 AM CDT | Severe Thunderstorm Warning | ABR | Day, Grant, Roberts | 45 min |
| Jun 22, 1:30 AM CDT | Severe Thunderstorm Warning | UNR | Haakon, Jackson, Meade, Pennington | 60 min |
| Jun 22, 1:44 AM CDT | Severe Thunderstorm Warning | ABR | Dewey, Potter, Walworth | 46 min |
| Jun 22, 1:57 AM CDT | Severe Thunderstorm Warning | ABR | Campbell, Corson, Dewey, Edmunds, McPherson, Walworth | 44 min |
| Jun 22, 2:05 AM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Lyman | 40 min |
| Jun 22, 2:11 AM CDT | Tornado Warning | UNR | Haakon | 16 min |
| Jun 22, 2:13 AM CDT | Severe Thunderstorm Warning | ABR | Codington, Day, Grant, Roberts | 47 min |
| Jun 22, 2:16 AM CDT | Severe Thunderstorm Warning | ABR | Edmunds, Faulk, Potter, Walworth | 44 min |
| Jun 22, 2:20 AM CDT | Severe Thunderstorm Warning | ABR | Hughes, Jones, Lyman, Stanley, Sully | 40 min |
| Jun 22, 2:22 AM CDT | Severe Thunderstorm Warning | ABR | Codington, Day, Grant, Roberts | 53 min |
| Jun 22, 2:22 AM CDT | Severe Thunderstorm Warning | UNR | Haakon, Jackson, Mellette | 53 min |
| Jun 22, 2:38 AM CDT | Severe Thunderstorm Warning | ABR | Lyman | 37 min |
| Jun 22, 2:54 AM CDT | Severe Thunderstorm Warning | ABR | Jones, Lyman | 66 min |
| Jun 22, 3:00 AM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Hand, Hughes, Hyde, Lyman, Stanley | 45 min |
| Jun 22, 3:18 AM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Hughes, Lyman | 57 min |
| Jun 22, 3:31 AM CDT | Severe Thunderstorm Warning | ABR | Clark, Day, Faulk, Hand, Spink | 44 min |
| Jun 22, 3:37 AM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Hand, Hughes, Hyde, Lyman, Sully | 53 min |
| Jun 22, 4:33 AM CDT | Severe Thunderstorm Warning | ABR | Clark, Codington, Hamlin, Spink | 42 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 3.7 hours before the alert went out and 77 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
- 495 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1751 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 5.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 11:25 PM CDT | Mesoscale Discussion | SPC | Becker, Big Stone, Clay, Douglas, Grant, Otter Tail and 5 more | 95 min |
| Jun 22, 1:17 AM CDT | Mesoscale Discussion | SPC | Big Stone, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 32 more | 58 min |
| Jun 22, 2:25 AM CDT | Severe Thunderstorm Watch | SPC | Anoka, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 36 more | 6 hr |
| Jun 22, 3:16 AM CDT | Mesoscale Discussion | SPC | Big Stone, Grant, Lac qui Parle, Lincoln, Pipestone, Rock and 1 more | 89 min |
| Jun 22, 4:53 AM CDT | Mesoscale Discussion | SPC | Anoka, Big Stone, Blue Earth, Brown, Carver, Chippewa and 44 more | 2 hr |
| Jun 22, 6:03 AM CDT | Severe Thunderstorm Watch | SPC | Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more | 4 hr |
| Jun 22, 7:42 AM CDT | Mesoscale Discussion | SPC | Blue Earth, Carver, Dakota, Dodge, Faribault, Fillmore and 16 more | 93 min |
| Jun 22, 2:50 PM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Benton, Carlton, Carver, Chisago and 10 more | 55 min |
| Jun 21, 8:32 PM CDT | Mesoscale Discussion | SPC | Adams, Barnes, Billings, Bowman, Burleigh, Dickey and 25 more | 88 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2015Severe Thunderstorm Watches in North Dakota, 2015Severe Thunderstorm Watches in Minnesota, 2015Every severe thunderstorm watch in 2015
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.