Alert archive / Minnesota / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 408
The Storm Prediction Center issued this severe thunderstorm watch at Jun 18, 2012, 10:08 PM CDT for 26 counties in Minnesota; 24 counties in South Dakota. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2012, 10:08 PM CDT (03:08 UTC)
- Expired
- Jun 19, 2012, 6:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 50 counties
Big Stone County, MN, Blue Earth County, MN, Brown County, MN, Chippewa County, MN, Cottonwood County, MN, Douglas County, MN, Grant County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Murray County, MN, Nicollet County, MN, Pipestone County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Watonwan County, MN, Yellow Medicine County, MN, Beadle County, SD, Brookings County, SD, Brown County, SD, Buffalo County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Marshall County, SD, McPherson County, SD, Miner County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 76 km from the middle of the area, began a volume at 03:08 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
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 11:23 PM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury | 37 min |
| Jun 18, 11:48 PM CDT | Severe Thunderstorm Warning | FSD | Kingsbury | 27 min |
| Jun 19, 12:11 AM CDT | Severe Thunderstorm Warning | FSD | Brookings, Kingsbury | 49 min |
| Jun 19, 12:49 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Pipestone | 41 min |
| Jun 19, 1:24 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon, Murray, Pipestone | 66 min |
| Jun 19, 2:00 AM CDT | Severe Thunderstorm Warning | MPX | Redwood | 60 min |
| Jun 19, 2:04 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 26 min |
| Jun 19, 2:20 AM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville, Yellow Medicine | 40 min |
| Jun 19, 2:34 AM CDT | Severe Thunderstorm Warning | ABR | Clark, Codington, Day, Deuel, Grant, Roberts | 56 min |
| Jun 19, 2:43 AM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, McPherson, Marshall | 29 min |
| Jun 19, 2:44 AM CDT | Severe Thunderstorm Warning | MPX | Brown, Nicollet, Redwood, Renville, Sibley | 46 min |
| Jun 19, 2:51 AM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, McPherson | 39 min |
| Jun 19, 3:19 AM CDT | Severe Thunderstorm Warning | MPX | Brown, Le Sueur, McLeod, Nicollet, Rice, Scott and 1 more | 41 min |
| Jun 19, 3:43 AM CDT | Severe Thunderstorm Warning | ABR | Codington, Deuel, Grant | 27 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 00:00Z, 3.1 hours before the alert went out and 73 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
- 3093 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 233 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 |
|---|---|---|---|---|
| Jun 18, 9:11 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Brown, Chippewa, Cottonwood, Jackson, Lac qui Parle and 13 more | 94 min |
| Jun 18, 11:59 PM CDT | Mesoscale Discussion | SPC | Brown, Chippewa, Kandiyohi, Lac qui Parle, Lincoln, Lyon and 7 more | 91 min |
| Jun 19, 2:39 AM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 45 more | 66 min |
| Jun 19, 3:25 AM CDT | Severe Thunderstorm Watch | SPC | Anoka, Carver, Dakota, Goodhue, Hennepin, Le Sueur and 6 more | 5 hr |
| Jun 19, 4:16 AM CDT | Mesoscale Discussion | SPC | Anoka, Dakota, Goodhue, Hennepin, Le Sueur, Ramsey and 4 more | 89 min |
| Jun 19, 4:56 PM CDT | Mesoscale Discussion | SPC | Becker, Benton, Big Stone, Crow Wing, Douglas, Grant and 11 more | 94 min |
| Jun 19, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 14 more | 7 hr |
| Jun 19, 6:08 PM CDT | Tornado Watch | SPC | Anoka, Benton, Big Stone, Chippewa, Chisago, Douglas and 18 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Minnesota, 2012Severe Thunderstorm Watches in South Dakota, 2012Every severe thunderstorm watch in 2012
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.