Alert archive / Iowa / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 631
The Storm Prediction Center issued this severe thunderstorm watch at Jul 4, 2003, 1:15 AM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 4, 2003, 1:15 AM CDT (06:15 UTC)
- Expired
- Jul 4, 2003, 7:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 111 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Marshall County, IA, Mitchell County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Story County, IA, Tama County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Carroll County, IL, Jo Daviess County, IL, Lee County, IL, Ogle County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Anoka County, MN, Blue Earth County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Isanti County, MN, Le Sueur County, MN, McLeod County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Wright County, MN, Adams County, WI, Barron County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dunn County, WI, Eau Claire County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Lincoln County, WI, Marathon County, WI, Marquette County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Portage County, WI, Richland County, WI, Rusk County, WI, Saint Croix County, WI, Sauk County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Waushara County, WI, Wood County, WI
Warnings issued inside it
31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 1:22 AM CDT | Severe Thunderstorm Warning | DMX | Hancock, Winnebago | 53 min |
| Jul 4, 1:28 AM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Faribault, Martin, Nicollet | 47 min |
| Jul 4, 1:43 AM CDT | Severe Thunderstorm Warning | DMX | Wright | 47 min |
| Jul 4, 1:48 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 42 min |
| Jul 4, 1:52 AM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 68 min |
| Jul 4, 1:55 AM CDT | Severe Thunderstorm Warning | DMX | Franklin | 50 min |
| Jul 4, 1:55 AM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, McLeod, Sibley | 50 min |
| Jul 4, 2:09 AM CDT | Tornado Warning | MPX | Nicollet | 36 min |
| Jul 4, 2:17 AM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard | 58 min |
| Jul 4, 2:17 AM CDT | Severe Thunderstorm Warning | DMX | Butler | 43 min |
| Jul 4, 2:24 AM CDT | Severe Thunderstorm Warning | MPX | Freeborn, Rice, Scott, Steele, Waseca | 51 min |
| Jul 4, 2:27 AM CDT | Severe Thunderstorm Warning | ARX | Dodge | 63 min |
| Jul 4, 2:34 AM CDT | Severe Thunderstorm Warning | MPX | Benton, Sherburne, Wright | 41 min |
| Jul 4, 2:44 AM CDT | Severe Thunderstorm Warning | DMX | Bremer | 46 min |
| Jul 4, 2:48 AM CDT | Severe Thunderstorm Warning | MPX | Anoka, Carver, Hennepin, McLeod, Sibley | 57 min |
| Jul 4, 2:49 AM CDT | Severe Thunderstorm Warning | ARX | Fayette, Winneshiek | 56 min |
| Jul 4, 2:52 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 53 min |
| Jul 4, 3:14 AM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 31 min |
| Jul 4, 3:20 AM CDT | Severe Thunderstorm Warning | ARX | Houston, Wabasha, Winona | 55 min |
| Jul 4, 3:28 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton | 47 min |
| Jul 4, 3:43 AM CDT | Severe Thunderstorm Warning | DVN | Delaware | 47 min |
| Jul 4, 3:53 AM CDT | Severe Thunderstorm Warning | ARX | Buffalo, La Crosse, Trempealeau | 67 min |
| Jul 4, 4:02 AM CDT | Severe Thunderstorm Warning | ARX | Vernon | 43 min |
| Jul 4, 4:09 AM CDT | Severe Thunderstorm Warning | MPX | Saint Croix | 36 min |
| Jul 4, 4:22 AM CDT | Severe Thunderstorm Warning | ARX | Jackson, Monroe | 68 min |
| Jul 4, 4:31 AM CDT | Severe Thunderstorm Warning | MPX | Dunn | 44 min |
| Jul 4, 4:38 AM CDT | Severe Thunderstorm Warning | ARX | Richland | 37 min |
| Jul 4, 4:46 AM CDT | Severe Thunderstorm Warning | MKX | Sauk | 44 min |
| Jul 4, 4:49 AM CDT | Severe Thunderstorm Warning | ARX | Juneau | 56 min |
| Jul 4, 5:09 AM CDT | Severe Thunderstorm Warning | ARX | Adams | 66 min |
| Jul 4, 5:17 AM CDT | Severe Thunderstorm Warning | GRB | Waushara, Wood | 58 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, 6.3 hours before the alert went out and 212 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
- 151 J/kg
- Mixed-layer CIN
- -708 J/kg
- Mixed-layer LCL
- 1300 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 3:27 AM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Grundy and 12 more | 93 min |
| Jul 4, 5:20 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Kane, Lake and 1 more | 4 hr |
| Jul 4, 7:25 AM CDT | Mesoscale Discussion | SPC | Cook, Lake, McHenry | 95 min |
| Jul 4, 12:48 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 26 more | 117 min |
| Jul 4, 2:20 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Champaign, DeWitt, Ford, Fulton, Grundy and 21 more | 6 hr |
| Jul 4, 3:29 PM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Douglas, Ford, Iroquois, Kankakee and 4 more | 2 hr |
| Jul 4, 5:07 PM CDT | Mesoscale Discussion | SPC | Bond, Clark, Clay, Clinton, Coles, Crawford and 27 more | 53 min |
| Jul 4, 6:29 PM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, Clark, Coles, DeWitt, Douglas and 29 more | 61 min |
| Jul 3, 8:11 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 94 min |
| Jul 3, 9:40 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 22 more | 6 hr |
| Jul 3, 11:23 PM CDT | Mesoscale Discussion | SPC | Allamakee, Boone, Bremer, Buena Vista, Butler, Calhoun and 36 more | 97 min |
| Jul 4, 12:42 AM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Boone, Bremer, Butler, Calhoun and 24 more | 63 min |
| Jul 3, 10:22 PM CDT | Mesoscale Discussion | SPC | Becker, Clay, Douglas, Grant, Hubbard, Otter Tail and 3 more | 23 min |
| Jul 3, 10:40 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Carlton, Cass, Clay, Crow Wing and 14 more | 5 hr |
| Jul 4, 12:25 AM CDT | Mesoscale Discussion | SPC | Traverse | 2 hr |
| Jul 4, 7:50 AM CDT | Severe Thunderstorm Watch | SPC | Manitowoc | 3 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2003Severe Thunderstorm Watches in Wisconsin, 2003Severe Thunderstorm Watches in Minnesota, 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.