Alert archive / Minnesota / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 555
The Storm Prediction Center issued this severe thunderstorm watch at Aug 3, 2012, 7:33 PM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2012, 7:33 PM CDT (00:33 UTC)
- Expired
- Aug 4, 2012, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 80 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Aitkin County, MN, Anoka County, MN, Beltrami County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carlton County, MN, Carver County, MN, Cass County, MN, Chippewa County, MN, Chisago County, MN, Clearwater County, MN, Cottonwood County, MN, Crow Wing County, MN, Dakota County, MN, Douglas County, MN, Faribault County, MN, Hennepin County, MN, Hubbard County, MN, Isanti County, MN, Itasca County, MN, Jackson County, MN, Kanabec County, MN, Kandiyohi County, MN, Koochiching County, MN, Lac qui Parle County, MN, Lake of the Woods County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pine County, MN, Pipestone County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Rock County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN, Dakota County, NE, Dixon County, NE, Clay County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Minneapolis radar (KMPX), 191 km from the middle of the area, began a volume at 00:33 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 7:37 PM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle, Yellow Medicine | 53 min |
| Aug 3, 7:46 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Davison, Hanson, Kingsbury, Lake, McCook and 2 more | 44 min |
| Aug 3, 7:54 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater, Pennington, Polk, Red Lake | 66 min |
| Aug 3, 8:12 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Clearwater, Hubbard, Otter Tail, Wadena | 63 min |
| Aug 3, 8:20 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Norman and 1 more | 55 min |
| Aug 3, 8:20 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 25 min |
| Aug 3, 8:20 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Lac qui Parle, Renville, Swift, Yellow Medicine | 55 min |
| Aug 3, 8:23 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Pipestone, Rock | 52 min |
| Aug 3, 8:26 PM CDT | Severe Thunderstorm Warning | MPX | Douglas, Pope, Stevens | 49 min |
| Aug 3, 8:27 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater, Lake of the Woods, Marshall, Roseau | 63 min |
| Aug 3, 8:44 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing, Itasca | 46 min |
| Aug 3, 8:58 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 35 min |
| Aug 3, 9:01 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood, Renville, Yellow Medicine | 59 min |
| Aug 3, 9:07 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Meeker, Pope, Renville, Stearns and 2 more | 53 min |
| Aug 3, 9:27 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Itasca | 48 min |
| Aug 3, 9:47 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown, McLeod, Nicollet, Redwood, Renville and 1 more | 58 min |
| Aug 3, 9:52 PM CDT | Severe Thunderstorm Warning | MPX | McLeod, Meeker, Renville, Sherburne, Stearns, Wright | 38 min |
| Aug 3, 10:38 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 37 min |
| Aug 3, 10:39 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin | 36 min |
| Aug 3, 10:43 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 32 min |
| Aug 3, 10:44 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Benton, Isanti, Mille Lacs, Sherburne, Wright | 46 min |
| Aug 3, 10:54 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Carver, Hennepin, Sherburne, Wright | 25 min |
| Aug 3, 11:06 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Carver, Chisago, Dakota, Hennepin, Ramsey and 2 more | 39 min |
| Aug 3, 11:07 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Saint Louis | 53 min |
| Aug 3, 11:12 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Chisago, Isanti | 33 min |
| Aug 3, 11:18 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Rice, Scott, Washington | 42 min |
| Aug 3, 11:38 PM CDT | Severe Thunderstorm Warning | MPX | Chisago, Washington | 67 min |
| Aug 3, 11:44 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Washington | 61 min |
| Aug 4, 1:25 AM CDT | Severe Thunderstorm Warning | MPX | Faribault, Martin | 65 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
Minneapolis, MN (KMPX), launched 00:00Z, 0.6 hours before the alert went out and 189 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
- 576 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 1840 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 257 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 7.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 10:33 PM CDT | Mesoscale Discussion | SPC | Worth | 87 min |
| Aug 4, 10:26 AM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Black Hawk, Boone, Bremer, Buchanan and 44 more | 49 min |
| Aug 4, 10:50 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clinton and 27 more | 5 hr |
| Aug 4, 1:09 PM CDT | Mesoscale Discussion | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 15 more | 66 min |
| Aug 3, 10:57 PM CDT | Severe Thunderstorm Watch | SPC | Dodge, Freeborn, Goodhue, Olmsted, Steele, Wabasha and 1 more | 4 hr |
| Aug 3, 7:11 PM CDT | Severe Thunderstorm Watch | SPC | Antelope, Blaine, Boyd, Brown, Cedar, Custer and 14 more | 7 hr |
| Aug 3, 11:19 PM CDT | Mesoscale Discussion | SPC | Antelope, Blaine, Boone, Cedar, Custer, Garfield and 10 more | 86 min |
Nearby
Severe Thunderstorm Watches in Minnesota, 2012Severe Thunderstorm Watches in Iowa, 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.