Alert archive / Illinois / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 195

May 1, 20035 states

The Storm Prediction Center issued this severe thunderstorm watch at May 1, 2003, 9:35 AM CDT for 5 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 1, 2003, 9:35 AM CDT (14:35 UTC)
Expired: May 1, 2003, 3:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 43 counties

Clay County, AR, Craighead County, AR, Greene County, AR, Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, White County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Lake County, TN, Obion County, TN

The radar

The Paducah radar (KPAH), 89 km from the middle of the area, began a volume at 14:38 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

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

Issued	Product	Office	Counties	Lasted
May 1, 9:41 AM CDT	Severe Thunderstorm Warning	PAH	Ripley	64 min
May 1, 10:00 AM CDT	Severe Thunderstorm Warning	PAH	Wayne	30 min
May 1, 10:07 AM CDT	Severe Thunderstorm Warning	PAH	Butler	38 min
May 1, 10:13 AM CDT	Severe Thunderstorm Warning	PAH	Stoddard	32 min
May 1, 10:25 AM CDT	Severe Thunderstorm Warning	MEG	Clay, Greene	50 min
May 1, 10:44 AM CDT	Severe Thunderstorm Warning	PAH	Scott	31 min
May 1, 11:41 AM CDT	Severe Thunderstorm Warning	MEG	Pemiscot	34 min
May 1, 12:11 PM CDT	Severe Thunderstorm Warning	PAH	Gallatin, Saline	49 min
May 1, 12:13 PM CDT	Severe Thunderstorm Warning	MEG	Gibson, Obion	62 min
May 1, 12:39 PM CDT	Severe Thunderstorm Warning	PAH	Calloway, Graves, Marshall	51 min
May 1, 12:42 PM CDT	Severe Thunderstorm Warning	PAH	White	48 min
May 1, 12:47 PM CDT	Severe Thunderstorm Warning	PAH	Hardin	28 min
May 1, 12:59 PM CDT	Severe Thunderstorm Warning	PAH	Crittenden	46 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

Little Rock, AR (KLZK), launched 12:00Z, 2.6 hours before the alert went out and 243 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: 1228 J/kg
Mixed-layer CIN: -198 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 53 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.

Issued	Product	Office	Counties	Lasted
May 1, 7:51 AM CDT	Mesoscale Discussion	SPC	Baxter, Clay, Fulton, Izard, Randolph, Searcy and 1 more	114 min
May 1, 11:23 AM CDT	Mesoscale Discussion	SPC	Crittenden, Cross, Mississippi, St. Francis	2 hr
May 1, 2:13 PM CDT	Mesoscale Discussion	SPC	Howard, Little River, Polk, Scott, Sevier	3 hr
May 1, 2:55 PM CDT	Tornado Watch	SPC	Little River	5 hr
May 1, 3:45 PM CDT	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Howard, Johnson and 9 more	5 hr
May 1, 6:10 PM CDT	Mesoscale Discussion	SPC	Arkansas, Dallas, Hempstead, Jefferson, Lee, Little River and 3 more	95 min
May 1, 6:58 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Hempstead, Howard and 10 more	92 min
Apr 30, 7:31 PM CDT	Mesoscale Discussion	SPC	Adams, Bureau, Cook, DeKalb, DuPage, Grundy and 21 more	119 min
Apr 30, 10:31 PM CDT	Mesoscale Discussion	SPC	Adams, Bureau, Cook, DeKalb, DuPage, Grundy and 21 more	89 min
Apr 30, 10:55 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Cass, DeWitt, Ford, Fulton and 22 more	5 hr
May 1, 1:19 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, DeWitt, Ford, Fulton and 18 more	86 min
May 1, 12:15 PM CDT	Severe Thunderstorm Watch	SPC	Gallatin, Hardin	5 hr
May 1, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Allen, Anderson, Barren, Bath, Bourbon and 53 more	5 hr
May 1, 5:11 PM CDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bath, Boone and 52 more	94 min
Apr 30, 9:22 PM CDT	Mesoscale Discussion	SPC	Barton, Bates, Benton, Camden, Cass, Cedar and 19 more	83 min
Apr 30, 9:30 PM CDT	Severe Thunderstorm Watch	SPC	Barton, Bates, Benton, Camden, Carroll, Cass and 25 more	6 hr
May 1, 12:00 AM CDT	Mesoscale Discussion	SPC	Barton, Bates, Benton, Camden, Carroll, Cass and 24 more	90 min
May 1, 2:27 AM CDT	Mesoscale Discussion	SPC	Barry, Barton, Bates, Benton, Camden, Cedar and 17 more	2 hr
May 1, 10:22 AM CDT	Mesoscale Discussion	SPC	Blount, Carter, Cocke, Greene, Hawkins, Jefferson and 7 more	113 min

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.