Alert archive / Illinois / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 375

May 14, 20034 states

The Storm Prediction Center issued this severe thunderstorm watch at May 14, 2003, 8:30 PM CDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: May 14, 2003, 8:30 PM CDT (01:30 UTC)
Expired: May 15, 2003, 12:00 AM CDT
In force: 4 hr
Issued by: the Storm Prediction Center

All 47 counties

Alexander County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Posey County, IN, Caldwell County, KY, Crittenden County, KY, Livingston County, KY, Union County, KY, Bollinger County, MO, Cape Girardeau County, MO, City of Saint Louis, MO, Franklin County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Perry County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 88 km from the middle of the area, began a volume at 01:33 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.

Issued	Product	Office	Counties	Lasted
May 14, 9:03 PM CDT	Severe Thunderstorm Warning	LSX	Madison	57 min
May 14, 9:16 PM CDT	Severe Thunderstorm Warning	LSX	Iron	44 min
May 14, 9:22 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	23 min
May 14, 9:27 PM CDT	Severe Thunderstorm Warning	PAH	Perry	48 min
May 14, 9:37 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	23 min
May 14, 9:44 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	46 min
May 14, 10:09 PM CDT	Severe Thunderstorm Warning	PAH	Jackson, Perry	51 min
May 14, 10:12 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	33 min
May 14, 10:27 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	33 min
May 14, 11:57 PM CDT	Flash Flood Warning	LSX	Iron, Madison	5 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 00:00Z, 1.5 hours before the alert went out and 246 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: 1529 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1142 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 14, 8:15 PM CDT	Mesoscale Discussion	SPC	Franklin, Gallatin, Hamilton, Hardin, Jackson, Jefferson and 12 more	60 min
May 14, 9:24 PM CDT	Mesoscale Discussion	SPC	Clark, Clay, Coles, Crawford, Cumberland, Douglas and 7 more	96 min
May 14, 10:10 PM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Hardin, Jackson, Johnson, Massac and 5 more	2 hr
May 14, 7:56 PM CDT	Mesoscale Discussion	SPC	Adams, Benton, Blackford, Boone, Carroll, Cass and 28 more	2 hr
May 15, 10:15 AM CDT	Severe Thunderstorm Watch	SPC	Clark, Crawford, Dearborn, Dubois, Floyd, Harrison and 12 more	6 hr
May 15, 2:20 PM CDT	Mesoscale Discussion	SPC	Clark, Floyd, Harrison, Ohio, Switzerland	85 min
May 15, 6:52 AM CDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Bell, Boyle, Breathitt and 68 more	2 hr
May 15, 12:22 PM CDT	Mesoscale Discussion	SPC	Adair, Barren, Bell, Boyle, Breathitt, Casey and 37 more	53 min
May 15, 12:50 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Barren, Bell, Boyle, Breathitt, Casey and 41 more	5 hr
May 15, 4:42 PM CDT	Mesoscale Discussion	SPC	Allen, Caldwell, Calloway, Christian, Graves, Logan and 9 more	63 min
May 15, 5:10 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Christian, Logan, Monroe, Simpson, Todd and 1 more	6 hr

Nearby

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