Alert archive / Indiana / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 654

July 6, 200320 counties in Illinois; 40 counties in Indiana

The Storm Prediction Center issued this severe thunderstorm watch at Jul 6, 2003, 1:10 PM CDT for 20 counties in Illinois; 40 counties in Indiana. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 6, 2003, 1:10 PM CDT (18:10 UTC)
Expired
Jul 6, 2003, 6:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 60 counties

Champaign County, IL, Christian County, IL, Clark County, IL, Coles County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Iroquois County, IL, Logan County, IL, Macon County, IL, McLean County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Sangamon County, IL, Shelby County, IL, Tazewell County, IL, Vermilion County, IL, Adams County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN

The radar

The Lincoln radar (KILX), 135 km from the middle of the area, began a volume at 18:11 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

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

IssuedProductOfficeCountiesLasted
Jul 6, 1:56 PM CDTSevere Thunderstorm WarningILXMcLean64 min
Jul 6, 2:47 PM CDTFlash Flood WarningIWXWhite118 min
Jul 6, 3:35 PM CDTSevere Thunderstorm WarningILXChampaign, Piatt55 min
Jul 6, 3:36 PM CDTSevere Thunderstorm WarningIWXCass, White54 min
Jul 6, 4:44 PM CDTSevere Thunderstorm WarningIWXHuntington46 min
Jul 6, 5:15 PM CDTFlash Flood WarningIWXHuntington2 hr
Jul 6, 5:40 PM CDTSevere Thunderstorm WarningLOTIroquois50 min
Jul 6, 5:40 PM CDTFlash Flood WarningIWXAdams, Wells2 hr
Jul 6, 5:45 PM CDTFlash Flood WarningIWXWhite2 hr
Jul 6, 5:52 PM CDTSevere Thunderstorm WarningIWXAdams23 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 12:00Z, 6.2 hours before the alert went out and 73 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 12:00Z on 2003-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1041 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 12:00Z on 2003-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939Sfc1 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
1041 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1114 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 7:20 PM CDTMesoscale DiscussionSPCEdgar, Iroquois, Vermilion55 min
Jul 5, 7:51 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 40 more54 min
Jul 5, 10:46 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 33 more59 min
Jul 6, 5:17 AM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson, Whiteside118 min
Jul 6, 7:45 AM CDTMesoscale DiscussionSPCBoone, DeKalb, DuPage, Kane, Lake, McHenry2 hr
Jul 6, 9:48 AM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Carroll, Cass and 34 more117 min
Jul 6, 11:45 AM CDTTornado WatchSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more6 hr
Jul 6, 12:36 PM CDTMesoscale DiscussionSPCCook, Kankakee114 min
Jul 6, 2:00 PM CDTMesoscale DiscussionSPCBoone, Brown, Cass, Champaign, Christian, Coles and 35 more2 hr
Jul 6, 5:28 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Champaign, Christian, Coles and 45 more62 min
Jul 6, 6:00 PM CDTSevere Thunderstorm WatchSPCBoone, Cook, DeKalb, DuPage, Ford, Grundy and 9 more5 hr
Jul 6, 1:25 PM CDTSevere Thunderstorm WatchSPCDeKalb, Elkhart, Kosciusko, LaGrange, LaPorte, Marshall and 4 more5 hr
Jul 6, 5:45 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 26 more5 hr

Nearby

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