Alert archive / Illinois / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 733
The Storm Prediction Center issued this severe thunderstorm watch at Sep 11, 2000, 7:00 PM CDT for 12 counties in Illinois; 11 counties in Iowa; 9 counties in Wisconsin. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 11, 2000, 7:00 PM CDT (00:00 UTC)
- Expired
- Sep 11, 2000, 11:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Cedar County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Muscatine County, IA, Scott County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Henry County, IL, Jo Daviess County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Rock County, WI, Walworth County, WI, Waukesha County, WI
The radar
The Quad Cities radar (KDVN), 48 km from the middle of the area, began a volume at 00:05 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
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 7:21 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 69 min |
| Sep 11, 7:21 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 69 min |
| Sep 11, 7:25 PM CDT | Severe Thunderstorm Warning | MKX | Waukesha | 65 min |
| Sep 11, 7:28 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson | 47 min |
| Sep 11, 7:38 PM CDT | Severe Thunderstorm Warning | MKX | Walworth | 67 min |
| Sep 11, 7:39 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Whiteside | 51 min |
| Sep 11, 8:00 PM CDT | Severe Thunderstorm Warning | MKX | Rock | 60 min |
| Sep 11, 8:02 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Scott | 43 min |
| Sep 11, 8:07 PM CDT | Severe Thunderstorm Warning | LOT | Ogle, Winnebago | 38 min |
| Sep 11, 8:07 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 38 min |
| Sep 11, 8:15 PM CDT | Severe Thunderstorm Warning | DVN | Muscatine | 30 min |
| Sep 11, 8:25 PM CDT | Tornado Warning | LOT | Ogle | 10 min |
| Sep 11, 8:30 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island, Whiteside | 45 min |
| Sep 11, 8:39 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 51 min |
| Sep 11, 8:57 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Lee, Ogle | 48 min |
| Sep 11, 8:57 PM CDT | Severe Thunderstorm Warning | LOT | Kane, McHenry | 48 min |
| Sep 11, 9:13 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 62 min |
| Sep 11, 9:25 PM CDT | Flash Flood Warning | MKX | Milwaukee, Waukesha | 4 hr |
| Sep 11, 10:15 PM CDT | Severe Thunderstorm Warning | DVN | Bureau | 45 min |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 0.0 hours before the alert went out and 47 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
- 1371 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 2176 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Cass, Fulton, Hancock, Henderson and 12 more | 4 hr |
| Sep 11, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Champaign, Christian, Clinton, DeWitt and 27 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Illinois, 2000Severe Thunderstorm Watches in Iowa, 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.