Alert archive / Illinois / Tornado Watches in 2008
Tornado Watch 455
The Storm Prediction Center issued this tornado watch at Jun 4, 2008, 7:02 PM CDT for 35 counties in Illinois; 30 counties in Indiana; Clinton County, Jackson County, Scott County, Iowa. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2008, 7:02 PM CDT (00:02 UTC)
- Expired
- Jun 5, 2008, 3:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 68 counties
Clinton County, IA, Jackson County, IA, Scott County, IA, Bureau County, IL, Carroll County, IL, Champaign County, IL, DeKalb County, IL, DeWitt County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Henderson County, IL, Henry County, IL, Iroquois County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Benton County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Howard County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Noble County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Warren County, IN, White County, IN
The radar
The Chicago radar (KLOT), 85 km from the middle of the area, began a volume at 00:04 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 7:07 PM CDT | Severe Thunderstorm Warning | IWX | Pulaski, White | 53 min |
| Jun 4, 7:11 PM CDT | Tornado Warning | LOT | Jasper | 37 min |
| Jun 4, 7:14 PM CDT | Tornado Warning | LOT | Iroquois | 61 min |
| Jun 4, 7:16 PM CDT | Tornado Warning | LOT | Iroquois, Kankakee | 59 min |
| Jun 4, 7:31 PM CDT | Severe Thunderstorm Warning | ILX | Tazewell, Woodford | 44 min |
| Jun 4, 7:37 PM CDT | Tornado Warning | IWX | Pulaski | 38 min |
| Jun 4, 7:38 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Tazewell, Woodford | 52 min |
| Jun 4, 7:45 PM CDT | Tornado Warning | LOT | Livingston | 48 min |
| Jun 4, 7:54 PM CDT | Tornado Warning | IWX | Pulaski, Starke | 35 min |
| Jun 4, 8:15 PM CDT | Tornado Warning | LOT | Jasper, Newton | 13 min |
| Jun 4, 8:17 PM CDT | Tornado Warning | IWX | Fulton, Marshall | 43 min |
| Jun 4, 8:19 PM CDT | Tornado Warning | ILX | McLean, Tazewell, Woodford | 26 min |
| Jun 4, 8:20 PM CDT | Tornado Warning | LOT | Iroquois, Kankakee | 55 min |
| Jun 4, 8:41 PM CDT | Tornado Warning | ILX | McLean, Woodford | 34 min |
| Jun 4, 8:50 PM CDT | Severe Thunderstorm Warning | IWX | Elkhart, Kosciusko | 26 min |
| Jun 4, 8:52 PM CDT | Tornado Warning | LOT | Iroquois | 41 min |
| Jun 4, 8:53 PM CDT | Severe Thunderstorm Warning | LOT | Jasper | 32 min |
| Jun 4, 9:03 PM CDT | Tornado Warning | LOT | LaSalle, Livingston | 31 min |
| Jun 4, 9:17 PM CDT | Tornado Warning | LOT | Iroquois, Kankakee | 58 min |
| Jun 4, 9:38 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 52 min |
| Jun 4, 9:52 PM CDT | Flash Flood Warning | LOT | Ford, Iroquois, Kankakee, Livingston | 8 hr |
| Jun 4, 9:57 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 46 min |
| Jun 4, 10:04 PM CDT | Severe Thunderstorm Warning | LOT | Lake, Porter | 41 min |
| Jun 4, 10:10 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall | 35 min |
| Jun 4, 10:11 PM CDT | Severe Thunderstorm Warning | LOT | Will | 34 min |
| Jun 4, 10:13 PM CDT | Tornado Warning | LOT | Kankakee | 62 min |
| Jun 4, 10:24 PM CDT | Severe Thunderstorm Warning | ILX | Marshall | 21 min |
| Jun 4, 10:31 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 44 min |
| Jun 4, 10:34 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 23 min |
| Jun 4, 11:15 PM CDT | Severe Thunderstorm Warning | LOT | Jasper, Newton | 60 min |
| Jun 4, 11:29 PM CDT | Flash Flood Warning | LOT | Cook, Kankakee, Will | 6 hr |
| Jun 4, 11:37 PM CDT | Severe Thunderstorm Warning | IWX | LaPorte, Pulaski, Starke | 68 min |
| Jun 5, 12:15 AM CDT | Flash Flood Warning | LOT | Jasper, Lake, Porter | 6 hr |
| Jun 5, 12:15 AM CDT | Severe Thunderstorm Warning | LOT | Jasper | 30 min |
| Jun 5, 12:42 AM CDT | Severe Thunderstorm Warning | IWX | Marshall, Pulaski, Starke | 63 min |
| Jun 5, 12:57 AM CDT | Severe Thunderstorm Warning | LOT | Jasper, Newton | 48 min |
| Jun 5, 1:21 AM CDT | Severe Thunderstorm Warning | LOT | Lake | 54 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
Lincoln, IL (KILX), launched 00:00Z, 0.0 hours before the alert went out and 127 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
- 2437 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1115 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 9.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 11:56 PM CDT | Tornado Watch | SPC | Hancock | 5 hr |
| Jun 5, 1:38 AM CDT | Mesoscale Discussion | SPC | Boone, Cook, DuPage, Jo Daviess, Kane, Lake and 3 more | 3 hr |
| Jun 5, 4:11 AM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Lee, Mercer, Ogle, Rock Island and 3 more | 94 min |
| Jun 5, 4:59 AM CDT | Tornado Watch | SPC | Boone, Carroll, Henry, Jo Daviess, Lee, Mercer and 5 more | 6 hr |
| Jun 5, 6:46 AM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Henry, Jo Daviess, McHenry, Mercer and 5 more | 119 min |
| Jun 5, 9:30 AM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Grundy, Kendall, LaSalle, Will | 90 min |
| Jun 4, 8:21 PM CDT | Mesoscale Discussion | SPC | Allen, DeKalb, Elkhart, Fulton, Kosciusko, LaGrange and 9 more | 54 min |
| Jun 4, 7:55 PM CDT | Mesoscale Discussion | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 65 min |
| Jun 4, 8:49 PM CDT | Tornado Watch | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 7 hr |
| Jun 4, 9:33 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 60 more | 87 min |
| Jun 4, 11:14 PM CDT | Mesoscale Discussion | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie, Taylor | 2 hr |
| Jun 5, 3:06 AM CDT | Mesoscale Discussion | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 84 min |
| Jun 5, 10:11 AM CDT | Mesoscale Discussion | SPC | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux and 1 more | 94 min |
| Jun 5, 10:35 AM CDT | Mesoscale Discussion | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 85 min |
| Jun 5, 10:55 AM CDT | Tornado Watch | SPC | Buena Vista, Cherokee, Clay, Crawford, Dickinson, Fremont and 15 more | 8 hr |
| Jun 5, 2:01 PM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, Osceola | 59 min |
| Jun 5, 5:10 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 39 more | 95 min |
| Jun 5, 5:29 PM CDT | Mesoscale Discussion | SPC | Lyon | 91 min |
| Jun 5, 5:50 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 44 more | 7 hr |
Nearby
Tornado Watches in Illinois, 2008Tornado Watches in Indiana, 2008Tornado Watches in Iowa, 2008Every tornado watch in 2008
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.