Alert archive / Iowa / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 673
The Storm Prediction Center issued this severe thunderstorm watch at Jul 24, 2005, 8:20 PM CDT for Jo Daviess County, Stephenson County, Illinois; 8 counties in Iowa; 4 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 24, 2005, 8:20 PM CDT (01:20 UTC)
- Expired
- Jul 25, 2005, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties 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, Jo Daviess County, IL, Stephenson County, IL, Grant County, WI, Green County, WI, Iowa County, WI, Lafayette County, WI
The radar
The La Crosse radar (KARX), 118 km from the middle of the area, began a volume at 01:21 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
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:21 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 39 min |
| Jul 24, 8:22 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 38 min |
| Jul 24, 8:37 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 38 min |
| Jul 24, 9:04 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 13 min |
| Jul 24, 9:15 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 31 min |
| Jul 24, 11:13 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 32 min |
| Jul 24, 11:19 PM CDT | Severe Thunderstorm Warning | MKX | Iowa | 38 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 00:00Z, 1.3 hours before the alert went out and 148 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
- 2277 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 2123 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 11:11 PM CDT | Mesoscale Discussion | SPC | Jo Daviess | 64 min |
| Jul 25, 8:53 AM CDT | Mesoscale Discussion | SPC | Cook, DeKalb, DuPage, Grundy, Iroquois, Kane and 7 more | 97 min |
| Jul 25, 10:05 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more | 7 hr |
| Jul 25, 1:31 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 27 more | 89 min |
| Jul 25, 3:50 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 55 min |
| Jul 24, 8:26 PM CDT | Mesoscale Discussion | SPC | Boone, Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo and 19 more | 94 min |
| Jul 24, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 5 hr |
| Jul 24, 11:45 PM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 60 min |
| Jul 25, 1:55 PM CDT | Mesoscale Discussion | SPC | Black Hawk, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 32 more | 2 hr |
| Jul 25, 3:30 PM CDT | Tornado Watch | SPC | Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee, Chickasaw and 19 more | 7 hr |
| Jul 25, 4:40 PM CDT | Tornado Watch | SPC | Allamakee, Clayton, Fayette, Winneshiek | 7 hr |
| Jul 25, 4:53 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Calhoun, Carroll and 20 more | 67 min |
| Jul 25, 5:25 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Calhoun, Carroll and 17 more | 4 hr |
| Jul 25, 6:56 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 18 more | 94 min |
| Jul 25, 4:22 PM CDT | Mesoscale Discussion | SPC | Adams, Barron, Brown, Buffalo, Calumet, Chippewa and 42 more | 23 min |
Nearby
Severe Thunderstorm Watches in Iowa, 2005Severe Thunderstorm Watches in Wisconsin, 2005Severe Thunderstorm Watches in Illinois, 2005Every severe thunderstorm watch in 2005
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.