Alert archive / Iowa / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 476
The Storm Prediction Center issued this severe thunderstorm watch at Jun 26, 2002, 4:30 PM CDT for 5 counties in Illinois; 30 counties in Iowa; Clark County, Scotland County, Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 26, 2002, 4:30 PM CDT (21:30 UTC)
- Expired
- Jun 26, 2002, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Benton County, IA, Buchanan County, IA, Cedar County, IA, Clayton County, IA, Clinton County, IA, Davis County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Henderson County, IL, Henry County, IL, Mercer County, IL, Rock Island County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 112 km from the middle of the area, began a volume at 21:30 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
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 4:35 PM CDT | Severe Thunderstorm Warning | DMX | Poweshiek, Tama | 55 min |
| Jun 26, 5:14 PM CDT | Severe Thunderstorm Warning | DMX | Jasper | 61 min |
| Jun 26, 5:29 PM CDT | Severe Thunderstorm Warning | DVN | Iowa | 61 min |
| Jun 26, 5:37 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 53 min |
| Jun 26, 5:51 PM CDT | Severe Thunderstorm Warning | DVN | Johnson | 54 min |
| Jun 26, 6:50 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Muscatine | 40 min |
| Jun 26, 7:22 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 58 min |
| Jun 26, 7:31 PM CDT | Severe Thunderstorm Warning | DVN | Mercer | 49 min |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 321 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
- 945 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 4:15 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Boone, Buchanan, Caldwell, Carroll and 25 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2002Severe Thunderstorm Watches in Illinois, 2002Severe Thunderstorm Watches in Missouri, 2002Every severe thunderstorm watch in 2002
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.