Alert archive / Illinois / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 471
The Storm Prediction Center issued this severe thunderstorm watch at Jun 14, 2004, 4:10 PM CDT for 35 counties in Illinois; Crittenden County, Livingston County, Kentucky; 23 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 14, 2004, 4:10 PM CDT (21:10 UTC)
- Expired
- Jun 14, 2004, 10:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 60 counties
Bond County, IL, Calhoun County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Greene County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Johnson County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Pike County, IL, Pope County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Scott County, IL, Union County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Crittenden County, KY, Livingston County, KY, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Knox County, MO, Lincoln County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Perry County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shelby County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 36 km from the middle of the area, began a volume at 21:13 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 4:28 PM CDT | Severe Thunderstorm Warning | LSX | Boone | 62 min |
| Jun 14, 7:00 PM CDT | Flash Flood Warning | EAX | Macon, Randolph | 8 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 9.2 hours before the alert went out and 220 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
- 790 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 930 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 5:25 AM CDT | Mesoscale Discussion | SPC | Bureau, DeKalb, Grundy, Henderson, Henry, Kendall and 12 more | 3 hr |
| Jun 14, 6:50 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Brown, Bureau, Carroll, Cass, Champaign and 44 more | 6 hr |
| Jun 14, 7:42 AM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, Cass, DeKalb, DeWitt, Ford and 31 more | 2 hr |
| Jun 14, 10:03 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Champaign, Cook, DeKalb, DeWitt and 32 more | 57 min |
| Jun 14, 3:15 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Greene, Jersey, Macoupin, Madison and 2 more | 90 min |
| Jun 13, 8:23 PM CDT | Mesoscale Discussion | SPC | Anderson, Bath, Bell, Bourbon, Boyle, Bracken and 38 more | 97 min |
| Jun 13, 10:45 PM CDT | Severe Thunderstorm Watch | SPC | Bath, Fleming, Greenup, Lewis, Mason, Montgomery and 1 more | 4 hr |
| Jun 14, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | Boyd, Lawrence | 4 hr |
| Jun 13, 11:56 PM CDT | Mesoscale Discussion | SPC | Atchison, Worth | 3 hr |
| Jun 14, 11:33 AM CDT | Mesoscale Discussion | SPC | Andrew, Audrain, Buchanan, Caldwell, Carroll, Chariton and 20 more | 3 hr |
| Jun 14, 1:20 PM CDT | Severe Thunderstorm Watch | SPC | Bates, Benton, Buchanan, Caldwell, Camden, Carroll and 17 more | 8 hr |
| Jun 14, 5:09 PM CDT | Mesoscale Discussion | SPC | Bates, Benton, Buchanan, Caldwell, Carroll, Cass and 18 more | 96 min |
Nearby
Severe Thunderstorm Watches in Illinois, 2004Severe Thunderstorm Watches in Missouri, 2004Severe Thunderstorm Watches in Kentucky, 2004Every severe thunderstorm watch in 2004
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.