Alert archive / Illinois / Tornado Watches in 2008
Tornado Watch 516
The Storm Prediction Center issued this tornado watch at Jun 12, 2008, 7:48 PM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 12, 2008, 7:48 PM CDT (00:48 UTC)
- Expired
- Jun 13, 2008, 2:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 60 counties
Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Kane County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Marshall County, IL, McDonough County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Clark County, MO, Scotland County, MO, Dane County, WI, Dodge County, WI, Green County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI
The radar
The Milwaukee radar (KMKX), 108 km from the middle of the area, began a volume at 00:47 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
33 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 7:56 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Mercer, Rock Island | 30 min |
| Jun 12, 7:59 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island, Whiteside | 30 min |
| Jun 12, 8:04 PM CDT | Severe Thunderstorm Warning | DVN | Mercer, Rock Island | 41 min |
| Jun 12, 8:43 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island, Whiteside | 36 min |
| Jun 12, 9:04 PM CDT | Flash Flood Warning | DVN | Johnson | 6 hr |
| Jun 12, 9:06 PM CDT | Severe Thunderstorm Warning | DVN | Mercer, Rock Island | 24 min |
| Jun 12, 9:08 PM CDT | Flash Flood Warning | DVN | Washington | 6 hr |
| Jun 12, 9:18 PM CDT | Flash Flood Warning | DVN | Jefferson | 6 hr |
| Jun 12, 9:24 PM CDT | Flash Flood Warning | DVN | Cedar | 6 hr |
| Jun 12, 9:29 PM CDT | Severe Thunderstorm Warning | DVN | Mercer, Rock Island | 31 min |
| Jun 12, 9:36 PM CDT | Flash Flood Warning | DVN | Clinton | 6 hr |
| Jun 12, 9:49 PM CDT | Tornado Warning | DVN | Rock Island, Whiteside | 41 min |
| Jun 12, 10:21 PM CDT | Flash Flood Warning | DVN | Jo Daviess | 6 hr |
| Jun 12, 10:30 PM CDT | Tornado Warning | DVN | Carroll, Henry, Rock Island, Whiteside | 45 min |
| Jun 12, 10:52 PM CDT | Flash Flood Warning | DVN | Stephenson | 6 hr |
| Jun 12, 11:07 PM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle | 38 min |
| Jun 12, 11:21 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 69 min |
| Jun 12, 11:23 PM CDT | Flash Flood Warning | DVN | Van Buren | 6 hr |
| Jun 12, 11:37 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Lee, Ogle | 53 min |
| Jun 12, 11:38 PM CDT | Severe Thunderstorm Warning | ILX | Knox, Marshall, Peoria, Stark | 52 min |
| Jun 12, 11:47 PM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle, Winnebago | 43 min |
| Jun 12, 11:55 PM CDT | Flash Flood Warning | DVN | Lee | 6 hr |
| Jun 12, 11:59 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Grundy, Kane, Kendall, LaSalle and 1 more | 61 min |
| Jun 13, 12:01 AM CDT | Flash Flood Warning | DVN | Clark, Scotland | 6 hr |
| Jun 13, 12:03 AM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 42 min |
| Jun 13, 12:18 AM CDT | Flash Flood Warning | MKX | Kenosha, Milwaukee, Racine | 87 min |
| Jun 13, 12:27 AM CDT | Tornado Warning | LOT | Boone, McHenry | 48 min |
| Jun 13, 12:28 AM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine | 47 min |
| Jun 13, 12:31 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Lake, Will | 59 min |
| Jun 13, 12:39 AM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 36 min |
| Jun 13, 1:08 AM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Milwaukee, Racine, Walworth, Waukesha | 52 min |
| Jun 13, 1:27 AM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox | 48 min |
| Jun 13, 1:59 AM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox, Marshall, Peoria, Stark, Tazewell and 1 more | 46 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
Davenport, (KDVN), launched 00:00Z, 0.8 hours before the alert went out and 122 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
- 3526 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 947 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 5.4
- Supercell composite
- 26.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 10:11 PM CDT | Severe Thunderstorm Watch | SPC | Adams | 6 hr |
| Jun 12, 11:15 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 27 more | 90 min |
| Jun 13, 1:36 AM CDT | Mesoscale Discussion | SPC | Adams, Boone, Brown, Bureau, Cass, Cook and 23 more | 54 min |
| Jun 13, 1:57 AM CDT | Severe Thunderstorm Watch | SPC | Brown, Bureau, Calhoun, Cass, Champaign, Christian and 38 more | 6 hr |
| Jun 13, 10:44 AM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Clay, Coles, Crawford, Cumberland and 28 more | 2 hr |
| Jun 13, 11:27 AM CDT | Severe Thunderstorm Watch | SPC | Bond, Champaign, Clark, Clay, Clinton, Coles and 28 more | 7 hr |
| Jun 13, 4:58 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 62 min |
| Jun 13, 5:27 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 6 hr |
| Jun 12, 8:18 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Henry, Lee, Van Buren | 87 min |
| Jun 12, 11:52 PM CDT | Mesoscale Discussion | SPC | Audrain, Barton, Bates, Benton, Boone, Callaway and 25 more | 113 min |
| Jun 13, 3:06 AM CDT | Mesoscale Discussion | SPC | Barton, Cedar, Dade, Jasper, Polk, St. Clair and 1 more | 84 min |
| Jun 13, 3:48 AM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Camden, Cedar, Christian, Dade and 15 more | 6 hr |
| Jun 13, 2:22 PM CDT | Mesoscale Discussion | SPC | Adair, Caldwell, Carroll, Chariton, Clay, Clinton and 11 more | 113 min |
| Jun 13, 3:12 PM CDT | Mesoscale Discussion | SPC | Ozark, Taney | 93 min |
Nearby
Tornado Watches in Illinois, 2008Tornado Watches in Iowa, 2008Tornado Watches in Wisconsin, 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.