Alert archive / Wisconsin / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 158
The Storm Prediction Center issued this severe thunderstorm watch at May 7, 2004, 5:25 PM CDT for 12 counties in Illinois; 10 counties in Iowa; 14 counties in Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 7, 2004, 5:25 PM CDT (22:25 UTC)
- Expired
- May 7, 2004, 11:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 36 counties
Allamakee County, IA, Buchanan County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Winneshiek County, IA, Boone County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Jo Daviess County, IL, Kane County, IL, Lake County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Winnebago County, IL, Crawford County, WI, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Walworth County, WI, Waukesha County, WI
The radar
The Quad Cities radar (KDVN), 133 km from the middle of the area, began a volume at 22:28 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 5:32 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 28 min |
| May 7, 5:52 PM CDT | Severe Thunderstorm Warning | MKX | Lafayette | 53 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, 10.4 hours before the alert went out and 131 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 219 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 |
|---|---|---|---|---|
| May 6, 11:53 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, Henry, Jo Daviess, Knox and 10 more | 97 min |
| May 7, 4:24 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 22 more | 96 min |
| May 7, 5:00 AM CDT | Severe Thunderstorm Watch | SPC | Bureau, Ford, Grundy, Iroquois, Kankakee, Kendall and 10 more | 4 hr |
| May 7, 6:38 AM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, DeWitt, Ford, Grundy, Iroquois and 12 more | 97 min |
| May 7, 11:44 AM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, DuPage, Grundy, Henry and 9 more | 2 hr |
| May 7, 4:33 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 9 more | 87 min |
| May 7, 2:26 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 26 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Wisconsin, 2004Severe Thunderstorm Watches in Illinois, 2004Severe Thunderstorm Watches in Iowa, 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.