Alert archive / Iowa / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 664
The Storm Prediction Center issued this severe thunderstorm watch at Jul 7, 2003, 2:40 AM CDT for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 7, 2003, 2:40 AM CDT (07:40 UTC)
- Expired
- Jul 7, 2003, 7:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Mitchell County, IA, Winneshiek County, IA, Jo Daviess County, IL, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI, Crawford County, WI, Grant County, WI, La Crosse County, WI, Trempealeau County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 53 km from the middle of the area, began a volume at 07:43 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 2:53 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 37 min |
| Jul 7, 3:09 AM CDT | Flash Flood Warning | ARX | Mitchell | 111 min |
| Jul 7, 3:18 AM CDT | Severe Thunderstorm Warning | ARX | Howard, Mitchell | 42 min |
| Jul 7, 3:48 AM CDT | Tornado Warning | ARX | Chickasaw | 42 min |
| Jul 7, 3:54 AM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 51 min |
| Jul 7, 4:06 AM CDT | Severe Thunderstorm Warning | ARX | Clayton, Fayette | 39 min |
| Jul 7, 4:49 AM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 41 min |
| Jul 7, 5:51 AM CDT | Severe Thunderstorm Warning | DVN | Jones | 39 min |
| Jul 7, 6:01 AM CDT | Severe Thunderstorm Warning | DVN | Jackson | 59 min |
| Jul 7, 6:13 AM CDT | Severe Thunderstorm Warning | DVN | Clinton | 47 min |
| Jul 7, 6:15 AM CDT | Flash Flood Warning | DVN | Jones | 3 hr |
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, 7.7 hours before the alert went out and 215 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
- 2301 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1006 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:46 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 10 more | 59 min |
| Jul 7, 1:25 AM CDT | Mesoscale Discussion | SPC | Jo Daviess, Stephenson, Winnebago | 95 min |
| Jul 7, 4:22 AM CDT | Mesoscale Discussion | SPC | Jo Daviess, Stephenson | 83 min |
| Jul 7, 6:23 AM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, Grundy, Henry, Kendall and 9 more | 97 min |
| Jul 7, 8:30 AM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Douglas, Ford, Grundy, Iroquois and 13 more | 60 min |
| Jul 7, 8:45 AM CDT | Severe Thunderstorm Watch | SPC | Champaign, Cook, DeWitt, Ford, Grundy, Iroquois and 6 more | 4 hr |
| Jul 7, 10:14 AM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Ford, Iroquois, McLean, Piatt and 1 more | 61 min |
| Jul 7, 12:14 PM CDT | Mesoscale Discussion | SPC | Bond, Brown, Cass, Champaign, Christian, Clark and 42 more | 61 min |
| Jul 7, 2:35 PM CDT | Mesoscale Discussion | SPC | Boone, Jo Daviess, McHenry, Stephenson, Winnebago | 115 min |
| Jul 7, 3:35 PM CDT | Severe Thunderstorm Watch | SPC | Rock Island | 5 hr |
| Jul 7, 4:34 PM CDT | Mesoscale Discussion | SPC | Iroquois, Kankakee, Vermilion, Will | 56 min |
| Jul 6, 7:45 PM CDT | Tornado Watch | SPC | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 6 hr |
| Jul 6, 8:57 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 35 more | 3 hr |
| Jul 6, 9:20 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 62 more | 6 hr |
| Jul 6, 11:06 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 62 more | 114 min |
| Jul 7, 3:30 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Benton, Cass and 31 more | 3 hr |
| Jul 6, 8:05 PM CDT | Tornado Watch | SPC | Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 6 more | 6 hr |
| Jul 6, 10:31 PM CDT | Mesoscale Discussion | SPC | Aitkin, Carlton, Cook, Crow Wing, Kanabec, Morrison and 2 more | 119 min |
| Jul 7, 2:56 AM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Carver, Chisago, Dakota, Hennepin and 9 more | 2 hr |
| Jul 7, 12:54 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calumet, Columbia, Dane, Dodge and 21 more | 66 min |
Nearby
Severe Thunderstorm Watches in Iowa, 2003Severe Thunderstorm Watches in Minnesota, 2003Severe Thunderstorm Watches in Wisconsin, 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.