Alert archive / Illinois / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 734
The Storm Prediction Center issued this severe thunderstorm watch at Sep 11, 2000, 8:00 PM CDT for 18 counties in Illinois; Des Moines County, Lee County, Iowa; 7 counties in Missouri. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 11, 2000, 8:00 PM CDT (01:00 UTC)
- Expired
- Sep 12, 2000, 12:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Des Moines County, IA, Lee County, IA, Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, LaSalle County, IL, Marshall County, IL, McDonough County, IL, Mercer County, IL, Peoria County, IL, Pike County, IL, Putnam County, IL, Schuyler County, IL, Stark County, IL, Warren County, IL, Clark County, MO, Lewis County, MO, Marion County, MO, Monroe County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO
The radar
The Lincoln radar (KILX), 158 km from the middle of the area, began a volume at 01:02 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
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 8:30 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island, Whiteside | 45 min |
| Sep 11, 9:05 PM CDT | Severe Thunderstorm Warning | DVN | Mercer | 55 min |
| Sep 11, 9:10 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 65 min |
| Sep 11, 9:13 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 62 min |
| Sep 11, 9:18 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Warren | 27 min |
| Sep 11, 9:18 PM CDT | Severe Thunderstorm Warning | ILX | Knox | 57 min |
| Sep 11, 9:18 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 27 min |
| Sep 11, 9:21 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Schuyler | 54 min |
| Sep 11, 9:32 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 58 min |
| Sep 11, 9:32 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Pike, Ralls | 58 min |
| Sep 11, 9:40 PM CDT | Severe Thunderstorm Warning | DVN | Putnam | 65 min |
| Sep 11, 9:57 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Stark | 63 min |
| Sep 11, 9:58 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall, LaSalle, Will | 62 min |
| Sep 11, 10:19 PM CDT | Tornado Warning | ILX | Fulton, Knox | 26 min |
| Sep 11, 10:26 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Morgan, Sangamon | 64 min |
| Sep 11, 10:28 PM CDT | Severe Thunderstorm Warning | ILX | Marshall | 62 min |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.0 hours before the alert went out and 166 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, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Henry, Jo Daviess, Lee and 6 more | 4 hr |
| Sep 11, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Champaign, Christian, Clinton, DeWitt and 27 more | 5 hr |
| Sep 11, 10:45 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Camden, Cedar, Christian, Dade and 20 more | 4 hr |
Nearby
Severe Thunderstorm Watches in Illinois, 2000Severe Thunderstorm Watches in Missouri, 2000Severe Thunderstorm Watches in Iowa, 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.