Alert archive / Iowa / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 179
The Storm Prediction Center issued this severe thunderstorm watch at Apr 19, 2000, 8:45 PM CDT for Jo Daviess County, Illinois; 30 counties in Iowa; Lafayette County, Wisconsin. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2000, 8:45 PM CDT (01:45 UTC)
- Expired
- Apr 20, 2000, 1:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Appanoose County, IA, Benton County, IA, Black Hawk County, IA, Buchanan County, IA, Cedar 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, 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, Tama County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Wayne County, IA, Jo Daviess County, IL, Lafayette County, WI
The radar
The Quad Cities radar (KDVN), 132 km from the middle of the area, began a volume at 01:49 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 9:03 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 42 min |
| Apr 19, 11:20 PM CDT | Severe Thunderstorm Warning | DVN | Muscatine | 40 min |
| Apr 20, 12:21 AM CDT | Severe Thunderstorm Warning | DVN | Lee | 24 min |
| Apr 20, 12:32 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 43 min |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.8 hours before the alert went out and 139 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
- 4 J/kg
- Mixed-layer CIN
- -616 J/kg
- Mixed-layer LCL
- 865 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 471 m²/s²
- 0-3 km storm-relative helicity
- 491 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Apr 19, 10:00 PM CDT | Tornado Watch | SPC | Adams, Brown, Cass, Fulton, Hancock, McDonough and 3 more | 6 hr |
| Apr 20, 12:45 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more | 5 hr |
| Apr 20, 3:15 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Jackson, Perry, Randolph, Union | 5 hr |
| Apr 20, 4:15 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Bond, Boone, Brown, Bureau, Calhoun and 61 more | 6 hr |
| Apr 20, 10:00 AM CDT | Tornado Watch | SPC | Bond, Champaign, Clark, Clay, Clinton, Coles and 30 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2000Severe Thunderstorm Watches in Illinois, 2000Severe Thunderstorm Watches in Wisconsin, 2000Every severe thunderstorm watch in 2000
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.