Alert archive / Wisconsin / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 817
The Storm Prediction Center issued this severe thunderstorm watch at Jul 31, 2003, 12:00 PM CDT for Jo Daviess County, Illinois; 15 counties in Iowa; 25 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2003, 12:00 PM CDT (17:00 UTC)
- Expired
- Jul 31, 2003, 6:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 41 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Iowa County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Winneshiek County, IA, Jo Daviess County, IL, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Juneau County, WI, Lafayette County, WI, Marquette County, WI, Outagamie County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Vernon County, WI, Washington County, WI, Waukesha County, WI, Waushara County, WI, Winnebago County, WI
The radar
The La Crosse radar (KARX), 88 km from the middle of the area, began a volume at 17:03 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.
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 |
|---|---|---|---|---|
| Jul 31, 12:14 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Vernon | 46 min |
| Jul 31, 12:44 PM CDT | Severe Thunderstorm Warning | MKX | Marquette | 76 min |
| Jul 31, 1:03 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Richland | 57 min |
| Jul 31, 1:26 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Sauk | 79 min |
| Jul 31, 1:32 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 28 min |
| Jul 31, 1:46 PM CDT | Severe Thunderstorm Warning | GRB | Waushara | 44 min |
| Jul 31, 2:31 PM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 74 min |
| Jul 31, 2:58 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Green | 77 min |
| Jul 31, 3:44 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard | 61 min |
| Jul 31, 3:57 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 63 min |
| Jul 31, 3:58 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 62 min |
| Jul 31, 4:18 PM CDT | Severe Thunderstorm Warning | MKX | Dane | 42 min |
| Jul 31, 4:59 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 31 min |
| Jul 31, 5:11 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 49 min |
| Jul 31, 5:40 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Waukesha | 50 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
Davenport, (KDVN), launched 12:00Z, 5.0 hours before the alert went out and 169 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
- 51 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1404 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 61 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 |
|---|---|---|---|---|
| Jul 31, 2:38 PM CDT | Mesoscale Discussion | SPC | Jo Daviess | 2 hr |
| Jul 31, 5:07 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, DuPage, Jo Daviess, Kane and 5 more | 53 min |
| Jul 31, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Jo Daviess, McHenry, Ogle, Stephenson and 1 more | 5 hr |
| Jul 31, 10:28 AM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Boone, Bremer, Butler, Cerro Gordo and 15 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2003Severe Thunderstorm Watches in Iowa, 2003Severe Thunderstorm Watches in Illinois, 2003Every severe thunderstorm watch in 2003
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.