Alert archive / Illinois / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 574
The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 2001, 1:15 PM CDT for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2001, 1:15 PM CDT (18:15 UTC)
- Expired
- Jul 18, 2001, 6:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 54 counties
Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Posey County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Graves County, KY, Henderson County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Cape Girardeau County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, Perry County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Washington County, MO, Wayne County, MO
The radar
The Paducah radar (KPAH), 101 km from the middle of the area, began a volume at 18:15 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
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 1:45 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 30 min |
| Jul 18, 1:48 PM CDT | Severe Thunderstorm Warning | PAH | Perry | 42 min |
| Jul 18, 1:59 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 46 min |
| Jul 18, 2:09 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 51 min |
| Jul 18, 2:29 PM CDT | Severe Thunderstorm Warning | PAH | Franklin | 46 min |
| Jul 18, 2:35 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 40 min |
| Jul 18, 2:44 PM CDT | Severe Thunderstorm Warning | PAH | Williamson | 46 min |
| Jul 18, 2:57 PM CDT | Severe Thunderstorm Warning | PAH | Perry | 63 min |
| Jul 18, 3:00 PM CDT | Severe Thunderstorm Warning | PAH | Johnson, Pope, Saline | 45 min |
| Jul 18, 3:20 PM CDT | Severe Thunderstorm Warning | PAH | Gallatin, Hardin | 40 min |
| Jul 18, 3:52 PM CDT | Severe Thunderstorm Warning | PAH | Cape Girardeau | 68 min |
| Jul 18, 4:21 PM CDT | Severe Thunderstorm Warning | PAH | Alexander | 39 min |
| Jul 18, 4:24 PM CDT | Severe Thunderstorm Warning | PAH | Lyon, Marshall | 36 min |
| Jul 18, 4:24 PM CDT | Severe Thunderstorm Warning | PAH | Caldwell | 36 min |
| Jul 18, 4:40 PM CDT | Severe Thunderstorm Warning | PAH | Trigg | 50 min |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 6.3 hours before the alert went out and 270 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
- 3296 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 521 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.9
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 |
|---|---|---|---|---|
| Jul 18, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Calloway, Carlisle, Fulton, Graves, Hickman, Todd and 1 more | 5 hr |
| Jul 18, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Andrew, Buchanan, Caldwell, Clinton, Daviess, DeKalb and 9 more | 4 hr |
Nearby
Severe Thunderstorm Watches in Illinois, 2001Severe Thunderstorm Watches in Kentucky, 2001Severe Thunderstorm Watches in Missouri, 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.