Alert archive / Iowa / Mesoscale Discussions in 2003
Mesoscale Discussion 2254
The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2003, 7:03 PM CDT for Mercer County, Rock Island County, Illinois; 19 counties in Iowa. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2003, 7:03 PM CDT (00:03 UTC)
- Expired
- Aug 25, 2003, 8:30 PM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 21 counties
Benton County, IA, Cedar County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Mahaska County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Mercer County, IL, Rock Island County, IL
The radar
The Quad Cities radar (KDVN), 109 km from the middle of the area, began a volume at 00:03 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.1 hours before the alert went out and 115 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
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 8:45 PM CDT | Severe Thunderstorm Watch | SPC | Henderson, Mercer, Rock Island, Warren | 5 hr |
| 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
Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Illinois, 2003Every mesoscale discussion 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.