Alert archive / Illinois / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 651
The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 2001, 4:00 PM CDT for 22 counties in Illinois; 4 counties in Iowa. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 2, 2001, 4:00 PM CDT (21:00 UTC)
- Expired
- Aug 2, 2001, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Des Moines County, IA, Henry County, IA, Lee County, IA, Louisa County, IA, Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Henderson County, IL, Knox County, IL, Macoupin County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Mercer County, IL, Montgomery County, IL, Morgan County, IL, Peoria County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Warren County, IL
The radar
The Lincoln radar (KILX), 91 km from the middle of the area, began a volume at 21:04 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 4:03 PM CDT | Severe Thunderstorm Warning | ILX | Knox | 57 min |
| Aug 2, 4:14 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 46 min |
| Aug 2, 4:46 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Peoria | 59 min |
| Aug 2, 4:57 PM CDT | Severe Thunderstorm Warning | ILX | Knox | 33 min |
| Aug 2, 5:22 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough | 38 min |
| Aug 2, 5:25 PM CDT | Severe Thunderstorm Warning | ILX | Mason, Tazewell | 80 min |
| Aug 2, 5:43 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Schuyler | 62 min |
| Aug 2, 5:51 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Menard | 69 min |
| Aug 2, 6:13 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Sangamon | 77 min |
| Aug 2, 6:22 PM CDT | Severe Thunderstorm Warning | ILX | Cass | 53 min |
| Aug 2, 6:39 PM CDT | Severe Thunderstorm Warning | ILX | Morgan, Scott | 66 min |
| Aug 2, 7:17 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 43 min |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 136 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
- 2814 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 991 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Severe Thunderstorm Watches in Illinois, 2001Severe Thunderstorm Watches in Iowa, 2001Every severe thunderstorm watch in 2001
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.