Alert archive / Iowa / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 888
The Storm Prediction Center issued this severe thunderstorm watch at Aug 25, 2003, 8:45 PM CDT for 4 counties in Illinois; 19 counties in Iowa. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2003, 8:45 PM CDT (01:45 UTC)
- Expired
- Aug 26, 2003, 2:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 23 counties
Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Henderson County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL
The radar
The Quad Cities radar (KDVN), 69 km from the middle of the area, began a volume at 01:48 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 |
|---|---|---|---|---|
| Aug 25, 9:01 PM CDT | Severe Thunderstorm Warning | DVN | Johnson, Louisa, Muscatine | 44 min |
| Aug 25, 10:29 PM CDT | Severe Thunderstorm Warning | DVN | Linn | 46 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, 1.8 hours before the alert went out and 75 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
- 2110 J/kg
- Mixed-layer CIN
- -142 J/kg
- Mixed-layer LCL
- 1896 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 7:03 PM CDT | Mesoscale Discussion | SPC | Mercer, Rock Island | 87 min |
| Aug 26, 12:21 AM CDT | Mesoscale Discussion | SPC | Boone, Jo Daviess, Lake, McHenry, Stephenson, Winnebago | 84 min |
| Aug 26, 11:15 AM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, Ford, Grundy, Henry, Iroquois and 11 more | 3 hr |
| Aug 26, 2:19 PM CDT | Mesoscale Discussion | SPC | Hancock, Henderson, McDonough | 116 min |
| Aug 26, 4:45 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, DeWitt, Fulton, Hancock and 14 more | 90 min |
| Aug 25, 7:38 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Boone, Bremer, Buchanan, Butler and 28 more | 67 min |
Nearby
Severe Thunderstorm Watches in Iowa, 2003Severe Thunderstorm Watches in Illinois, 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.