Alert archive / Wisconsin / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 595
The Storm Prediction Center issued this severe thunderstorm watch at Aug 13, 2007, 9:45 PM CDT for 17 counties in Iowa; 10 counties in Minnesota; 24 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2007, 9:45 PM CDT (02:45 UTC)
- Expired
- Aug 14, 2007, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 51 counties
Allamakee County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Grundy County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Worth County, IA, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Marathon County, WI, Marquette County, WI, Monroe County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Waushara County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 51 km from the middle of the area, began a volume at 02:46 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
- 90%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 10:15 PM CDT | Severe Thunderstorm Warning | ARX | Wabasha | 60 min |
| Aug 13, 11:14 PM CDT | Severe Thunderstorm Warning | ARX | Jackson, Trempealeau | 46 min |
| Aug 13, 11:57 PM CDT | Severe Thunderstorm Warning | ARX | Jackson | 31 min |
| Aug 14, 12:09 AM CDT | Severe Thunderstorm Warning | ARX | Wabasha | 56 min |
| Aug 14, 12:31 AM CDT | Severe Thunderstorm Warning | ARX | Dodge, Olmsted, Wabasha | 59 min |
| Aug 14, 1:38 AM CDT | Severe Thunderstorm Warning | ARX | La Crosse, Monroe, Vernon | 52 min |
| Aug 14, 1:40 AM CDT | Severe Thunderstorm Warning | ARX | Olmsted | 26 min |
| Aug 14, 2:01 AM CDT | Flash Flood Warning | ARX | Monroe, Vernon | 3 hr |
| Aug 14, 2:03 AM CDT | Severe Thunderstorm Warning | MKX | Dane | 27 min |
| Aug 14, 2:09 AM CDT | Flash Flood Warning | ARX | Fillmore, Houston, Winona | 3 hr |
| Aug 14, 2:13 AM CDT | Severe Thunderstorm Warning | ARX | Crawford, Richland | 47 min |
| Aug 14, 2:17 AM CDT | Severe Thunderstorm Warning | MKX | Iowa, Lafayette, Sauk | 73 min |
| Aug 14, 2:20 AM CDT | Severe Thunderstorm Warning | ARX | Grant | 55 min |
| Aug 14, 2:44 AM CDT | Severe Thunderstorm Warning | ARX | Clayton | 61 min |
| Aug 14, 3:09 AM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 66 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, 2.8 hours before the alert went out and 181 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
- 2096 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 263 m²/s²
- 0-3 km storm-relative helicity
- 409 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 11:35 PM CDT | Mesoscale Discussion | SPC | Allamakee | 85 min |
| Aug 14, 1:23 AM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 27 more | 67 min |
| Aug 14, 2:45 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more | 4 hr |
| Aug 14, 3:32 AM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 7 more | 28 min |
| Aug 14, 5:43 AM CDT | Mesoscale Discussion | SPC | Cedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 7 more | 62 min |
| Aug 14, 3:05 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Benton, Black Hawk, Boone, Calhoun and 28 more | 85 min |
| Aug 14, 6:54 PM CDT | Mesoscale Discussion | SPC | Adair, Appanoose, Audubon, Boone, Calhoun, Carroll and 35 more | 66 min |
| Aug 13, 8:49 PM CDT | Mesoscale Discussion | SPC | Anoka, Chisago, Dakota, Dodge, Fillmore, Goodhue and 11 more | 116 min |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2007Severe Thunderstorm Watches in Iowa, 2007Severe Thunderstorm Watches in Minnesota, 2007Every severe thunderstorm watch in 2007
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.