Alert archive / Iowa / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 697
The Storm Prediction Center issued this severe thunderstorm watch at Aug 3, 2004, 2:25 PM CDT for 13 counties in Iowa; Fillmore County, Houston County, Mower County, Minnesota; 4 counties in Wisconsin. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2004, 2:25 PM CDT (19:25 UTC)
- Expired
- Aug 3, 2004, 7:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Allamakee County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Worth County, IA, Fillmore County, MN, Houston County, MN, Mower County, MN, Crawford County, WI, Grant County, WI, Richland County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 85 km from the middle of the area, began a volume at 19:26 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 |
|---|---|---|---|---|
| Aug 3, 3:02 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 58 min |
| Aug 3, 3:09 PM CDT | Severe Thunderstorm Warning | ARX | Mitchell | 51 min |
| Aug 3, 3:28 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 32 min |
| Aug 3, 3:42 PM CDT | Severe Thunderstorm Warning | ARX | Fillmore, Houston | 63 min |
| Aug 3, 4:19 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 41 min |
| Aug 3, 4:38 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Grundy | 52 min |
| Aug 3, 6:12 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Richland | 78 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 12:00Z, 7.4 hours before the alert went out and 198 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
- 485 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 2:02 AM CDT | Mesoscale Discussion | SPC | Benton, Black Hawk, Boone, Buena Vista, Butler, Calhoun and 30 more | 118 min |
| Aug 3, 7:21 AM CDT | Mesoscale Discussion | SPC | Lyon | 54 min |
| Aug 3, 10:48 AM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Buena Vista, Butler and 32 more | 87 min |
| Aug 3, 11:05 AM CDT | Severe Thunderstorm Watch | SPC | Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo, Cherokee and 25 more | 6 hr |
| Aug 3, 1:16 PM CDT | Mesoscale Discussion | SPC | Benton, Black Hawk, Boone, Bremer, Buchanan, Buena Vista and 46 more | 89 min |
| Aug 3, 3:00 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Carroll, Cass, Crawford, Greene and 8 more | 2 hr |
| Aug 3, 3:55 PM CDT | Mesoscale Discussion | SPC | Adair, Appanoose, Benton, Black Hawk, Boone, Buchanan and 43 more | 95 min |
| Aug 3, 4:25 PM CDT | Tornado Watch | SPC | Appanoose, Benton, Black Hawk, Boone, Buchanan, Cedar and 39 more | 6 hr |
| Aug 3, 4:52 PM CDT | Mesoscale Discussion | SPC | Adams, Audubon, Cass, Fremont, Harrison, Mills and 5 more | 53 min |
| Aug 3, 5:00 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Cass, Fremont, Guthrie and 9 more | 5 hr |
| Aug 3, 5:07 PM CDT | Mesoscale Discussion | SPC | Allamakee, Clayton, Fayette, Winneshiek | 53 min |
| Aug 3, 5:39 PM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clarke and 32 more | 66 min |
| Aug 3, 6:34 PM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clinton and 28 more | 86 min |
| Aug 3, 6:45 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Fremont, Guthrie and 9 more | 90 min |
| Aug 3, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more | 5 hr |
| Aug 3, 6:43 PM CDT | Mesoscale Discussion | SPC | Crawford, Grant, Richland | 32 min |
Nearby
Severe Thunderstorm Watches in Iowa, 2004Severe Thunderstorm Watches in Wisconsin, 2004Severe Thunderstorm Watches in Minnesota, 2004Every severe thunderstorm watch in 2004
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.