Alert archive / Illinois / Tornado Watches in 2004

Tornado Watch 329

May 30, 200437 counties in Illinois; Newton County, Indiana

The Storm Prediction Center issued this tornado watch at May 30, 2004, 7:40 AM CDT for 37 counties in Illinois; Newton County, Indiana. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 30, 2004, 7:40 AM CDT (12:40 UTC)
Expired: May 30, 2004, 1:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 38 counties

Adams County, IL, Brown County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Iroquois County, IL, Kankakee County, IL, Knox County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Pike County, IL, Putnam County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Woodford County, IL, Newton County, IN

The radar

The Lincoln radar (KILX), 34 km from the middle of the area, began a volume at 12:40 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

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

Issued	Product	Office	Counties	Lasted
May 30, 8:51 AM CDT	Severe Thunderstorm Warning	ILX	Fulton, Peoria, Tazewell	39 min
May 30, 9:01 AM CDT	Severe Thunderstorm Warning	ILX	Stark	44 min
May 30, 9:06 AM CDT	Flash Flood Warning	ILX	Knox, Stark	6 hr
May 30, 9:27 AM CDT	Severe Thunderstorm Warning	ILX	Peoria, Tazewell, Woodford	48 min
May 30, 9:34 AM CDT	Flash Flood Warning	ILX	Peoria, Tazewell	6 hr
May 30, 9:46 AM CDT	Tornado Warning	ILX	Tazewell, Woodford	59 min
May 30, 9:52 AM CDT	Flash Flood Warning	ILX	Marshall, Woodford	6 hr
May 30, 10:01 AM CDT	Flash Flood Warning	DVN	Putnam	4 hr
May 30, 10:27 AM CDT	Flash Flood Warning	ILX	McLean	6 hr
May 30, 10:34 AM CDT	Tornado Warning	LOT	Livingston	26 min
May 30, 11:06 AM CDT	Severe Thunderstorm Warning	ILX	DeWitt, McLean	39 min
May 30, 11:10 AM CDT	Severe Thunderstorm Warning	ILX	Logan, Macon	50 min
May 30, 11:25 AM CDT	Tornado Warning	LOT	Livingston	50 min
May 30, 11:46 AM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois, Kankakee	59 min
May 30, 12:04 PM CDT	Flash Flood Warning	LOT	Benton, Jasper, Lake, Newton, Porter	3 hr
May 30, 12:43 PM CDT	Severe Thunderstorm Warning	LOT	Benton, Jasper, Lake, Newton, Porter	92 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, 0.7 hours before the alert went out and 97 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: 1629 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 8.9

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 30, 9:40 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Greene, Hancock and 6 more	3 hr
May 30, 10:04 AM CDT	Mesoscale Discussion	SPC	Alexander, Clay, Clinton, Edwards, Franklin, Gallatin and 19 more	2 hr
May 30, 10:50 AM CDT	Tornado Watch	SPC	Adams, Brown, Hancock, McDonough, Pike	8 hr
May 30, 11:04 AM CDT	Mesoscale Discussion	SPC	Champaign, Cook, DeWitt, Douglas, DuPage, Iroquois and 4 more	116 min
May 30, 11:50 AM CDT	Tornado Watch	SPC	Clark, Crawford, Edgar, Edwards, Gallatin, Hardin and 7 more	7 hr
May 30, 12:13 PM CDT	Mesoscale Discussion	SPC	Carroll, Hancock, Henderson, Henry, Jo Daviess, Knox and 4 more	2 hr
May 30, 12:25 PM CDT	Tornado Watch	SPC	Bureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 8 more	7 hr
May 30, 12:53 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Christian, Fulton and 13 more	2 hr
May 30, 1:05 PM CDT	Tornado Watch	SPC	Alexander, Bond, Calhoun, Cass, Champaign, Christian and 45 more	6 hr
May 30, 3:16 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cass, DeKalb, DuPage and 29 more	119 min
May 30, 4:25 PM CDT	Tornado Watch	SPC	Boone, Cook, DeKalb, DuPage, Grundy, Iroquois and 12 more	6 hr
May 30, 5:10 PM CDT	Mesoscale Discussion	SPC	Alexander, Bond, Clinton, Fayette, Jackson, Madison and 7 more	95 min
May 30, 5:36 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cass, Champaign, Christian and 39 more	54 min
May 30, 6:40 PM CDT	Tornado Watch	SPC	Alexander, Bond, Champaign, Christian, Clark, Clay and 41 more	6 hr
May 30, 6:55 PM CDT	Tornado Watch	SPC	Gallatin, Hardin, Lawrence, Wabash	8 hr
May 30, 3:05 PM CDT	Mesoscale Discussion	SPC	Bartholomew, Blackford, Boone, Brown, Clark, Crawford and 47 more	115 min
May 30, 3:55 PM CDT	Tornado Watch	SPC	Adams, Dearborn, Ohio, Switzerland, Union, Wayne	5 hr

Nearby

Tornado Watches in Illinois, 2004 Tornado Watches in Indiana, 2004 Every tornado watch in 2004

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.