Alert archive / Illinois / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 692

July 8, 200333 counties in Illinois; 33 counties in Indiana

The Storm Prediction Center issued this severe thunderstorm watch at Jul 8, 2003, 10:55 PM CDT for 33 counties in Illinois; 33 counties in Indiana. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 8, 2003, 10:55 PM CDT (03:55 UTC)
Expired
Jul 9, 2003, 4:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 66 counties

Bond County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Fulton County, IL, Greene County, IL, Jasper County, IL, Jersey County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Mason County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Daviess County, IN, Decatur County, IN, Floyd County, IN, Fountain County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Scott County, IN, Shelby County, IN, Sullivan County, IN, Vermillion County, IN, Vigo County, IN, Washington County, IN

The radar

The Lincoln radar (KILX), 89 km from the middle of the area, began a volume at 03:58 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.

IssuedProductOfficeCountiesLasted
Jul 8, 11:09 PM CDTSevere Thunderstorm WarningILXChristian51 min
Jul 8, 11:45 PM CDTSevere Thunderstorm WarningILXMoultrie, Shelby45 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, 3.9 hours before the alert went out and 49 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2003-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 261 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2003-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
261 J/kg
Mixed-layer CIN
-205 J/kg
Mixed-layer LCL
1152 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
281 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 8, 8:59 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 36 more2 hr
Jul 9, 2:21 AM CDTMesoscale DiscussionSPCBond, Cass, Champaign, Christian, Clark, Clay and 27 more114 min
Jul 9, 9:54 AM CDTMesoscale DiscussionSPCBureau, Champaign, Christian, Clark, Coles, Crawford and 28 more96 min
Jul 9, 11:10 AM CDTSevere Thunderstorm WatchSPCBureau, Champaign, Clark, Coles, DeWitt, Douglas and 17 more6 hr
Jul 9, 12:34 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Clinton, Effingham and 17 more56 min
Jul 9, 1:35 PM CDTMesoscale DiscussionSPCChampaign, Coles, Douglas, Edgar, Ford, Grundy and 4 more55 min
Jul 9, 3:12 PM CDTMesoscale DiscussionSPCClark, Edgar, Kankakee33 min
Jul 9, 3:15 PM CDTTornado WatchSPCCarroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 5 more6 hr
Jul 9, 5:04 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Crawford, Cumberland and 18 more86 min
Jul 9, 5:25 PM CDTTornado WatchSPCCass, Champaign, Christian, Clark, Coles, Cumberland and 24 more4 hr
Jul 9, 5:38 PM CDTMesoscale DiscussionSPCBureau, Fulton, Hancock, Henderson, Henry, Knox and 12 more97 min
Jul 8, 8:37 PM CDTMesoscale DiscussionSPCBartholomew, Benton, Blackford, Boone, Brown, Carroll and 50 more2 hr
Jul 9, 3:35 PM CDTSevere Thunderstorm WatchSPCAdams, Bartholomew, Blackford, Dearborn, Decatur, Delaware and 21 more5 hr
Jul 9, 5:55 PM CDTSevere Thunderstorm WatchSPCBartholomew, Benton, Boone, Brown, Carroll, Clay and 26 more3 hr
Jul 9, 6:02 PM CDTMesoscale DiscussionSPCDearborn, Decatur, Fayette, Franklin, Jefferson, Jennings and 7 more88 min

Nearby

Severe Thunderstorm Watches in Illinois, 2003Severe Thunderstorm Watches in Indiana, 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.