Alert archive / Illinois / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 506

June 10, 200329 counties in Illinois; 29 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jun 10, 2003, 3:40 PM CDT for 29 counties in Illinois; 29 counties in Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 10, 2003, 3:40 PM CDT (20:40 UTC)
Expired
Jun 10, 2003, 9:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 58 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, Clinton County, IL, Fayette County, IL, Fulton County, IL, Greene County, IL, Jersey County, IL, Logan County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Washington County, IL, Woodford County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lewis County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Phelps County, MO, Pike County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Shelby County, MO, Warren County, MO, Washington County, MO, Wright County, MO

The radar

The St Louis radar (KLSX), 75 km from the middle of the area, began a volume at 20:43 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

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

IssuedProductOfficeCountiesLasted
Jun 10, 3:52 PM CDTSevere Thunderstorm WarningLSXCallaway38 min
Jun 10, 4:13 PM CDTSevere Thunderstorm WarningLSXGasconade47 min
Jun 10, 4:13 PM CDTSevere Thunderstorm WarningSGFMiller62 min
Jun 10, 4:15 PM CDTFlash Flood WarningSGFMiller4 hr
Jun 10, 4:15 PM CDTSevere Thunderstorm WarningSGFMaries60 min
Jun 10, 4:17 PM CDTSevere Thunderstorm WarningLSXMontgomery, Osage43 min
Jun 10, 4:31 PM CDTSevere Thunderstorm WarningLSXCrawford44 min
Jun 10, 4:33 PM CDTSevere Thunderstorm WarningSGFPulaski42 min
Jun 10, 4:37 PM CDTSevere Thunderstorm WarningLSXWarren38 min
Jun 10, 4:37 PM CDTTornado WarningLSXCrawford38 min
Jun 10, 4:58 PM CDTSevere Thunderstorm WarningLSXWashington62 min
Jun 10, 5:01 PM CDTSevere Thunderstorm WarningLSXSaint Charles44 min
Jun 10, 5:12 PM CDTSevere Thunderstorm WarningLSXJefferson, Saint Francois48 min
Jun 10, 5:27 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis48 min
Jun 10, 5:50 PM CDTSevere Thunderstorm WarningLSXMadison40 min
Jun 10, 5:52 PM CDTSevere Thunderstorm WarningLSXMonroe, Saint Clair38 min
Jun 10, 5:52 PM CDTSevere Thunderstorm WarningSGFMaries38 min
Jun 10, 6:03 PM CDTSevere Thunderstorm WarningLSXRandolph42 min
Jun 10, 6:07 PM CDTTornado WarningLSXMonroe, Randolph, Saint Clair38 min
Jun 10, 6:13 PM CDTTornado WarningLSXClinton, Saint Clair47 min
Jun 10, 6:18 PM CDTSevere Thunderstorm WarningLSXWashington42 min
Jun 10, 6:27 PM CDTFlash Flood WarningLSXMadison, Saint Clair4 hr
Jun 10, 6:29 PM CDTTornado WarningLSXClinton, Marion46 min
Jun 10, 7:22 PM CDTSevere Thunderstorm WarningLSXMonroe38 min
Jun 10, 8:09 PM CDTSevere Thunderstorm WarningSGFMiller66 min
Jun 10, 8:33 PM CDTFlash Flood WarningSGFMiller5 hr

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, 8.7 hours before the alert went out and 235 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 2003-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 77 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 2003-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.1939587897Sfc1 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
77 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
1451 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 10, 7:15 AM CDTSevere Thunderstorm WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 16 more6 hr
Jun 10, 10:24 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 14 more2 hr
Jun 10, 5:07 PM CDTMesoscale DiscussionSPCJackson, Monroe, Perry, Randolph, Saint Clair, Washington113 min
Jun 10, 6:35 PM CDTSevere Thunderstorm WatchSPCBond, Clay, Clinton, Crawford, Edwards, Effingham and 22 more4 hr
Jun 9, 9:22 PM CDTMesoscale DiscussionSPCGentry, Harrison, Mercer, Nodaway, Putnam, Schuyler and 3 more53 min
Jun 9, 11:46 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Holt, Nodaway119 min
Jun 10, 12:15 AM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Buchanan, Clinton, Daviess, DeKalb and 7 more5 hr
Jun 10, 2:44 AM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Clay and 18 more2 hr
Jun 10, 7:07 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Bollinger, Butler, Camden and 36 more113 min
Jun 10, 12:18 PM CDTMesoscale DiscussionSPCAudrain, Barton, Bates, Benton, Boone, Callaway and 33 more117 min
Jun 10, 12:50 PM CDTSevere Thunderstorm WatchSPCBates, Benton, Camden, Carroll, Cass, Cedar and 17 more6 hr
Jun 10, 5:55 PM CDTMesoscale DiscussionSPCBates, Cass, Cooper, Henry, Howard, Jackson and 4 more95 min

Nearby

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