Alert archive / Illinois / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 834
The Storm Prediction Center issued this severe thunderstorm watch at Aug 3, 2003, 2:20 PM CDT for 6 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2003, 2:20 PM CDT (19:20 UTC)
- Expired
- Aug 3, 2003, 8:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 70 counties
Clay County, AR, Alexander County, IL, Bond County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Posey County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, City of Saint Louis, MO, Dunklin County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Perry County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Benton County, TN, Carroll County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Lake County, TN, Obion County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 54 km from the middle of the area, began a volume at 19:22 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 3, 2:38 PM CDT | Severe Thunderstorm Warning | PAH | Butler | 52 min |
| Aug 3, 3:01 PM CDT | Severe Thunderstorm Warning | PAH | Mississippi, New Madrid | 29 min |
| Aug 3, 3:29 PM CDT | Severe Thunderstorm Warning | PAH | Butler | 46 min |
| Aug 3, 3:36 PM CDT | Flash Flood Warning | PAH | Butler | 3 hr |
| Aug 3, 4:23 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger | 37 min |
| Aug 3, 4:24 PM CDT | Flash Flood Warning | PAH | Bollinger | 3 hr |
| Aug 3, 5:27 PM CDT | Flash Flood Warning | PAH | Massac | 2 hr |
| Aug 3, 5:43 PM CDT | Severe Thunderstorm Warning | ILX | Crawford | 47 min |
| Aug 3, 6:08 PM CDT | Severe Thunderstorm Warning | PAH | Wayne | 37 min |
| Aug 3, 6:21 PM CDT | Severe Thunderstorm Warning | ILX | Lawrence | 54 min |
| Aug 3, 6:32 PM CDT | Severe Thunderstorm Warning | ILX | Richland | 58 min |
| Aug 3, 7:25 PM CDT | Severe Thunderstorm Warning | PAH | Jefferson | 35 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 7.3 hours before the alert went out and 266 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
- 2892 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 669 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 1:39 AM CDT | Mesoscale Discussion | SPC | Benton, Crawford, Franklin, Sebastian, Washington | 96 min |
| Aug 3, 2:35 AM CDT | Severe Thunderstorm Watch | SPC | Scott, Sebastian | 5 hr |
| Aug 3, 5:00 AM CDT | Mesoscale Discussion | SPC | Scott, Sebastian | 60 min |
| Aug 3, 9:54 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 40 more | 3 hr |
| Aug 3, 5:38 PM CDT | Mesoscale Discussion | SPC | Baxter, Boone, Carroll, Fulton, Marion | 2 hr |
| Aug 2, 9:11 PM CDT | Mesoscale Discussion | SPC | Bond, Clay, Clinton, Coles, Cumberland, Effingham and 9 more | 94 min |
| Aug 3, 3:25 PM CDT | Mesoscale Discussion | SPC | Alexander, Hardin, Jackson, Johnson, Massac, Pope and 3 more | 2 hr |
| Aug 3, 6:15 PM CDT | Mesoscale Discussion | SPC | Bureau, Champaign, Ford, Grundy, Henry, Iroquois and 10 more | 105 min |
Nearby
Severe Thunderstorm Watches in Illinois, 2003Severe Thunderstorm Watches in Kentucky, 2003Severe Thunderstorm Watches in Missouri, 2003Every severe thunderstorm watch in 2003
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.