Alert archive / Iowa / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 245
The Storm Prediction Center issued this severe thunderstorm watch at May 22, 2004, 12:05 AM CDT for 28 counties in Illinois; 32 counties in Iowa; Grant County, Green County, Lafayette County, Wisconsin. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 22, 2004, 12:05 AM CDT (05:05 UTC)
- Expired
- May 22, 2004, 6:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 63 counties
Benton County, IA, Black Hawk 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, Hardin County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Marshall County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Story County, IA, Tama County, IA, Washington County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Jo Daviess County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Grant County, WI, Green County, WI, Lafayette County, WI
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 12:07 AM CDT | Tornado Warning | DMX | Hamilton | 38 min |
| May 22, 12:18 AM CDT | Severe Thunderstorm Warning | ARX | Floyd | 57 min |
| May 22, 12:22 AM CDT | Severe Thunderstorm Warning | LOT | Lake | 23 min |
| May 22, 12:30 AM CDT | Flash Flood Warning | ARX | Grant | 3 hr |
| May 22, 12:36 AM CDT | Severe Thunderstorm Warning | LOT | McHenry | 54 min |
| May 22, 12:59 AM CDT | Flash Flood Warning | ARX | Chickasaw, Floyd | 3 hr |
| May 22, 1:40 AM CDT | Severe Thunderstorm Warning | LOT | Cook | 50 min |
| May 22, 2:07 AM CDT | Severe Thunderstorm Warning | ARX | Fayette | 38 min |
| May 22, 2:16 AM CDT | Severe Thunderstorm Warning | LOT | DeKalb | 44 min |
| May 22, 2:16 AM CDT | Severe Thunderstorm Warning | ARX | Clayton | 44 min |
| May 22, 2:48 AM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 42 min |
| May 22, 2:54 AM CDT | Severe Thunderstorm Warning | ARX | Grant | 66 min |
| May 22, 3:21 AM CDT | Flash Flood Warning | DVN | Delaware, Dubuque | 6 hr |
| May 22, 3:29 AM CDT | Severe Thunderstorm Warning | DVN | Jackson | 31 min |
| May 22, 3:40 AM CDT | Flash Flood Warning | DVN | Benton, Linn | 6 hr |
| May 22, 3:47 AM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 43 min |
| May 22, 3:55 AM CDT | Severe Thunderstorm Warning | DVN | Carroll, Whiteside | 65 min |
| May 22, 4:22 AM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle, Winnebago | 83 min |
| May 22, 4:27 AM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess, Stephenson | 63 min |
| May 22, 4:48 AM CDT | Flash Flood Warning | DVN | Carroll, Jo Daviess, Stephenson | 4 hr |
| May 22, 5:18 AM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 42 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
Lincoln, IL (KILX), launched 00:00Z, 5.1 hours before the alert went out and 322 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
- 1120 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1669 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 7:37 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, DuPage, Grundy and 19 more | 83 min |
| May 22, 2:41 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 23 more | 94 min |
| May 22, 6:58 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Fulton, Hancock, Henderson and 13 more | 62 min |
| May 22, 11:03 AM CDT | Mesoscale Discussion | SPC | DeWitt, Ford, Grundy, Iroquois, Kankakee, LaSalle and 9 more | 57 min |
| May 22, 11:35 AM CDT | Severe Thunderstorm Watch | SPC | Champaign, Cook, DeWitt, Douglas, Ford, Grundy and 10 more | 6 hr |
| May 22, 5:52 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, Grundy, Henry, Jo Daviess and 12 more | 113 min |
| May 22, 6:15 PM CDT | Tornado Watch | SPC | Boone, Bureau, Carroll, DeKalb, DuPage, Grundy and 25 more | 6 hr |
| May 21, 9:55 PM CDT | Tornado Watch | SPC | Audubon, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 14 more | 4 hr |
| May 22, 12:25 AM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 14 more | 2 hr |
| May 22, 12:55 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 17 more | 5 hr |
| May 22, 3:44 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Cass, Dallas and 11 more | 61 min |
| May 22, 3:02 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 29 more | 58 min |
| May 22, 3:45 PM CDT | Tornado Watch | SPC | Fremont, Harrison, Mills, Pottawattamie, Shelby | 7 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2004Severe Thunderstorm Watches in Illinois, 2004Severe Thunderstorm Watches in Wisconsin, 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.