Alert archive / Illinois / Tornado Watches in 2008

Tornado Watch 513

June 12, 20084 states

The Storm Prediction Center issued this tornado watch at Jun 12, 2008, 1:04 PM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2008, 1:04 PM CDT (18:04 UTC)
Expired: Jun 12, 2008, 8:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center

All 80 counties

Cedar County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn 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, Fulton County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McHenry County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Schuyler County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Clark County, MO, Scotland County, MO, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Quad Cities radar (KDVN), 67 km from the middle of the area, began a volume at 18:07 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

87 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 12, 1:08 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Rock, Walworth, Waukesha	67 min
Jun 12, 1:16 PM CDT	Flash Flood Warning	DVN	Delaware, Dubuque, Jones	6 hr
Jun 12, 1:22 PM CDT	Severe Thunderstorm Warning	ARX	Grant	38 min
Jun 12, 1:36 PM CDT	Flash Flood Warning	ARX	Grant	3 hr
Jun 12, 1:42 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Jo Daviess	33 min
Jun 12, 1:42 PM CDT	Flash Flood Warning	MKX	Iowa, Lafayette	6 hr
Jun 12, 1:52 PM CDT	Flash Flood Warning	MKX	Racine, Walworth, Waukesha	54 min
Jun 12, 1:55 PM CDT	Severe Thunderstorm Warning	MKX	Racine, Walworth, Waukesha	35 min
Jun 12, 2:12 PM CDT	Severe Thunderstorm Warning	MKX	Milwaukee, Waukesha	48 min
Jun 12, 2:14 PM CDT	Severe Thunderstorm Warning	ARX	Grant	46 min
Jun 12, 2:26 PM CDT	Tornado Warning	ARX	Grant	15 min
Jun 12, 2:36 PM CDT	Tornado Warning	MKX	Milwaukee	15 min
Jun 12, 2:37 PM CDT	Flash Flood Warning	MKX	Sauk	5 hr
Jun 12, 2:37 PM CDT	Tornado Warning	MKX	Iowa	23 min
Jun 12, 2:49 PM CDT	Severe Thunderstorm Warning	LOT	Ogle	26 min
Jun 12, 2:55 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Walworth, Waukesha	50 min
Jun 12, 2:56 PM CDT	Tornado Warning	MKX	Columbia, Dane, Iowa	49 min
Jun 12, 3:08 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Washington	52 min
Jun 12, 3:12 PM CDT	Severe Thunderstorm Warning	DVN	Stephenson	21 min
Jun 12, 3:13 PM CDT	Severe Thunderstorm Warning	LOT	Winnebago	22 min
Jun 12, 3:16 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	44 min
Jun 12, 3:18 PM CDT	Flash Flood Warning	DVN	Cedar, Jefferson, Johnson, Washington	6 hr
Jun 12, 3:24 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	52 min
Jun 12, 3:29 PM CDT	Severe Thunderstorm Warning	LOT	Boone, Winnebago	15 min
Jun 12, 3:32 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Jackson, Jones	28 min
Jun 12, 3:35 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	25 min
Jun 12, 3:35 PM CDT	Severe Thunderstorm Warning	MKX	Waukesha	40 min
Jun 12, 3:38 PM CDT	Flash Flood Warning	MKX	Columbia	4 hr
Jun 12, 3:46 PM CDT	Flash Flood Warning	MKX	Dodge, Jefferson, Walworth, Washington, Waukesha	4 hr
Jun 12, 3:46 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Sauk	29 min
Jun 12, 3:52 PM CDT	Severe Thunderstorm Warning	MKX	Dodge	38 min
Jun 12, 4:10 PM CDT	Tornado Warning	MKX	Dodge	35 min
Jun 12, 4:12 PM CDT	Flash Flood Warning	MKX	Fond du Lac, Green Lake, Marquette	3 hr
Jun 12, 4:19 PM CDT	Flash Flood Warning	ARX	Grant	5 hr
Jun 12, 4:25 PM CDT	Tornado Warning	MKX	Columbia, Fond du Lac, Green Lake	30 min
Jun 12, 4:28 PM CDT	Severe Thunderstorm Warning	MKX	Racine, Walworth, Waukesha	37 min
Jun 12, 4:34 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	32 min
Jun 12, 4:37 PM CDT	Flash Flood Warning	DVN	Jo Daviess	6 hr
Jun 12, 4:39 PM CDT	Tornado Warning	MKX	Dodge, Fond du Lac	51 min
Jun 12, 4:43 PM CDT	Flash Flood Warning	MKX	Dane, Green, Iowa, Lafayette, Rock	3 hr
Jun 12, 4:46 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Lafayette	44 min
Jun 12, 4:49 PM CDT	Tornado Warning	MKX	Dodge, Fond du Lac, Green Lake	41 min
Jun 12, 4:58 PM CDT	Tornado Warning	MKX	Dane, Green, Lafayette	32 min
Jun 12, 5:05 PM CDT	Severe Thunderstorm Warning	MKX	Green, Lafayette	55 min
Jun 12, 5:07 PM CDT	Severe Thunderstorm Warning	DVN	Rock Island	38 min
Jun 12, 5:14 PM CDT	Tornado Warning	DVN	Van Buren	31 min
Jun 12, 5:19 PM CDT	Tornado Warning	MKX	Dane, Green, Rock	41 min
Jun 12, 5:22 PM CDT	Tornado Warning	MKX	Fond du Lac	38 min
Jun 12, 5:25 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson	50 min
Jun 12, 5:25 PM CDT	Tornado Warning	MKX	Green	50 min
Jun 12, 5:32 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Keokuk	27 min
Jun 12, 5:35 PM CDT	Flash Flood Warning	DVN	Van Buren	6 hr
Jun 12, 5:45 PM CDT	Flash Flood Warning	MKX	Ozaukee, Sheboygan	113 min
Jun 12, 5:48 PM CDT	Severe Thunderstorm Warning	MKX	Ozaukee, Sheboygan, Washington	27 min
Jun 12, 5:49 PM CDT	Tornado Warning	DVN	Jefferson, Van Buren	26 min
Jun 12, 5:54 PM CDT	Tornado Warning	MKX	Dane, Dodge, Jefferson	24 min
Jun 12, 5:56 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Delaware, Iowa, Johnson, Jones and 1 more	37 min
Jun 12, 5:57 PM CDT	Tornado Warning	DVN	Henry, Jefferson, Van Buren	12 min
Jun 12, 5:57 PM CDT	Tornado Warning	MKX	Fond du Lac	18 min
Jun 12, 6:00 PM CDT	Tornado Warning	MKX	Dane, Rock	30 min
Jun 12, 6:01 PM CDT	Tornado Warning	DVN	Van Buren	34 min
Jun 12, 6:03 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Louisa, Washington	42 min
Jun 12, 6:04 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Whiteside	26 min
Jun 12, 6:05 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	25 min
Jun 12, 6:12 PM CDT	Severe Thunderstorm Warning	MKX	Ozaukee, Sheboygan	48 min
Jun 12, 6:14 PM CDT	Tornado Warning	DVN	Henry, Louisa, Washington	27 min
Jun 12, 6:16 PM CDT	Tornado Warning	MKX	Fond du Lac, Sheboygan	44 min
Jun 12, 6:19 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	26 min
Jun 12, 6:20 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee, Louisa	40 min
Jun 12, 6:30 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Delaware, Dubuque, Jones, Linn	30 min
Jun 12, 6:30 PM CDT	Tornado Warning	MKX	Dane, Jefferson	30 min
Jun 12, 6:31 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Van Buren	33 min
Jun 12, 6:38 PM CDT	Severe Thunderstorm Warning	DVN	Mercer, Rock Island	52 min
Jun 12, 6:48 PM CDT	Flash Flood Warning	DVN	Iowa, Keokuk	6 hr
Jun 12, 6:57 PM CDT	Flash Flood Warning	DVN	Des Moines, Henry, Louisa, Muscatine	6 hr
Jun 12, 7:01 PM CDT	Tornado Warning	MKX	Dane, Dodge, Jefferson	29 min
Jun 12, 7:02 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Louisa, Washington	26 min
Jun 12, 7:03 PM CDT	Flash Flood Warning	DVN	Carroll, Whiteside	6 hr
Jun 12, 7:06 PM CDT	Severe Thunderstorm Warning	DVN	Henderson, Mercer	33 min
Jun 12, 7:09 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Waukesha	51 min
Jun 12, 7:13 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Mercer, Rock Island	47 min
Jun 12, 7:16 PM CDT	Flash Flood Warning	DVN	Mercer, Rock Island	6 hr
Jun 12, 7:22 PM CDT	Tornado Warning	DVN	Henry, Rock Island	23 min
Jun 12, 7:31 PM CDT	Flash Flood Warning	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 11 more	6 hr
Jun 12, 7:39 PM CDT	Flash Flood Warning	ARX	Grant	3 hr
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

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 12:00Z, 6.1 hours before the alert went out and 62 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 698 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 285 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 12:37 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Brown, Bureau, Carroll, DeKalb and 29 more	113 min
Jun 12, 3:06 PM CDT	Tornado Watch	SPC	Adams, Brown	7 hr
Jun 12, 3:45 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, DeKalb, DuPage, Fulton and 22 more	90 min
Jun 12, 3:52 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, DeKalb, Henderson, Henry and 12 more	113 min
Jun 12, 6:49 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Bureau, Carroll, Cook, DeKalb and 26 more	86 min
Jun 11, 8:05 PM CDT	Mesoscale Discussion	SPC	Boone, Bremer, Butler, Cerro Gordo, Chickasaw, Clarke and 24 more	115 min
Jun 11, 8:39 PM CDT	Tornado Watch	SPC	Adair, Adams, Appanoose, Black Hawk, Boone, Bremer and 39 more	5 hr
Jun 11, 8:57 PM CDT	Mesoscale Discussion	SPC	Audubon, Carroll, Cass, Crawford, Fremont, Harrison and 6 more	93 min
Jun 11, 9:46 PM CDT	Tornado Watch	SPC	Fremont, Mills, Montgomery, Page	5 hr
Jun 11, 9:58 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Black Hawk, Boone, Bremer and 36 more	92 min
Jun 11, 11:41 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 43 more	2 hr
Jun 12, 3:56 AM CDT	Mesoscale Discussion	SPC	Appanoose, Lucas, Marion, Monroe, Wayne	94 min
Jun 12, 2:26 PM CDT	Mesoscale Discussion	SPC	Buchanan, Caldwell, Clay, Clinton, Daviess, DeKalb and 7 more	2 hr
Jun 12, 4:51 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calumet, Juneau, Langlade, Lincoln and 13 more	84 min

Nearby

Tornado Watches in Illinois, 2008 Tornado Watches in Wisconsin, 2008 Tornado Watches in Iowa, 2008 Every 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.