Alert archive / Illinois / Tornado Watches in 2004

Tornado Watch 342

May 30, 20044 states

The Storm Prediction Center issued this tornado watch at May 30, 2004, 6:40 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 30, 2004, 6:40 PM CDT (23:40 UTC)
Expired
May 31, 2004, 1:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 67 counties

Alexander County, IL, Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Macon County, IL, Madison County, IL, Marion County, IL, Massac County, IL, McLean County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Shelby County, IL, Union County, IL, Vermilion County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Benton County, IN, Fountain County, IN, Vermillion County, IN, Warren County, IN, Ballard County, KY, Carlisle County, KY, Hickman County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Ripley County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The St Louis radar (KLSX), 130 km from the middle of the area, began a volume at 23:39 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

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

IssuedProductOfficeCountiesLasted
May 30, 6:40 PM CDTTornado WarningPAHJefferson35 min
May 30, 6:40 PM CDTTornado WarningPAHStoddard65 min
May 30, 6:48 PM CDTSevere Thunderstorm WarningLOTFord42 min
May 30, 6:48 PM CDTTornado WarningPAHScott57 min
May 30, 6:49 PM CDTSevere Thunderstorm WarningILXPiatt56 min
May 30, 6:50 PM CDTTornado WarningPAHWilliamson55 min
May 30, 6:53 PM CDTSevere Thunderstorm WarningPAHFranklin22 min
May 30, 6:57 PM CDTTornado WarningILXChampaign, Piatt63 min
May 30, 6:59 PM CDTTornado WarningPAHUnion46 min
May 30, 7:04 PM CDTSevere Thunderstorm WarningPAHAlexander, Pulaski41 min
May 30, 7:08 PM CDTTornado WarningILXClay52 min
May 30, 7:08 PM CDTSevere Thunderstorm WarningPAHHamilton, Saline, Wayne22 min
May 30, 7:09 PM CDTSevere Thunderstorm WarningPAHJohnson51 min
May 30, 7:11 PM CDTSevere Thunderstorm WarningPAHMississippi, New Madrid49 min
May 30, 7:12 PM CDTFlash Flood WarningILXClay, Crawford, Richland6 hr
May 30, 7:15 PM CDTTornado WarningINDParke, Vermillion60 min
May 30, 7:16 PM CDTSevere Thunderstorm WarningPAHBallard59 min
May 30, 7:19 PM CDTFlash Flood WarningILXJasper, Lawrence6 hr
May 30, 7:20 PM CDTSevere Thunderstorm WarningLOTBenton40 min
May 30, 7:21 PM CDTFlash Flood WarningILXChampaign, Vermilion6 hr
May 30, 7:24 PM CDTTornado WarningILXVermilion66 min
May 30, 7:25 PM CDTSevere Thunderstorm WarningPAHMassac, Pope65 min
May 30, 7:26 PM CDTSevere Thunderstorm WarningPAHEdwards, Wabash49 min
May 30, 7:28 PM CDTTornado WarningILXJasper, Richland62 min
May 30, 7:28 PM CDTFlash Flood WarningLOTBenton, Jasper, Lake, Newton, Porter2 hr
May 30, 7:29 PM CDTFlash Flood WarningINDParke, Vermillion5 hr
May 30, 7:32 PM CDTSevere Thunderstorm WarningPAHMcCracken58 min
May 30, 7:33 PM CDTSevere Thunderstorm WarningPAHHamilton, Saline, Wayne27 min
May 30, 7:36 PM CDTSevere Thunderstorm WarningPAHCarlisle54 min
May 30, 7:37 PM CDTTornado WarningILXCrawford, Lawrence53 min
May 30, 7:41 PM CDTSevere Thunderstorm WarningPAHGallatin, White49 min
May 30, 7:43 PM CDTTornado WarningPAHNew Madrid47 min
May 30, 7:57 PM CDTSevere Thunderstorm WarningPAHSaline18 min
May 30, 7:58 PM CDTSevere Thunderstorm WarningPAHFulton, Hickman62 min
May 30, 8:00 PM CDTSevere Thunderstorm WarningPAHMississippi45 min
May 30, 10:38 PM CDTFlash Flood WarningPAHCrittenden, Graves, Livingston, Lyon, McCracken, Marshall and 1 more112 min
May 30, 11:23 PM CDTFlash Flood WarningILXEffingham4 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, 11.7 hours before the alert went out and 227 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 2004-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1629 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 2004-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 201 square meters per square second.193958Sfc1 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
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.

000 
WWUS20 KWNS 302337
SEL2  
SPC WW 302340
ILZ000-KYZ000-MOZ000-310600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 342
NWS STORM PREDICTION CENTER NORMAN OK
640 PM CDT SUN MAY 30 2004

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       CENTRAL AND SOUTHERN ILLINOIS
       FAR WESTERN KENTUCKY
       SOUTHEASTERN MISSOURI

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 640 PM UNTIL
100 AM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 2 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES EAST NORTHEAST OF BLOOMINGTON ILLINOIS TO
35 MILES EAST SOUTHEAST OF POPLAR BLUFF MISSOURI.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 334. WATCH NUMBER 334 WILL NOT BE IN EFFECT AFTER 640
PM CDT. CONTINUE...WW 331...WW 332...WW 335...WW 336...WW 337...WW
338...WW 339...WW 340...WW 341...

DISCUSSION...PARAMETERS REMAIN VERY FAVORABLE FOR TORNADIC
SUPERCELLS ACROSS WW THIS EVENING...A FEW OF WHICH COULD BE QUITE
STRONG.  BOWING STRUCTURE MAY ALSO EVOLVE ACROSS SERN MO/SRN IL/FAR
WRN KY THIS EVENING WITH ADDITIONAL THREAT OF VERY STRONG DAMAGING
WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25030.


...EVANS

404,0865 363,0884 363,0905 404,0891

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 30, 7:40 AM CDTTornado WatchSPCAdams, Brown, Cass, Champaign, Christian, Coles and 31 more5 hr
May 30, 9:40 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Greene, Hancock and 6 more3 hr
May 30, 10:04 AM CDTMesoscale DiscussionSPCAlexander, Clay, Clinton, Edwards, Franklin, Gallatin and 19 more2 hr
May 30, 10:50 AM CDTTornado WatchSPCAdams, Brown, Hancock, McDonough, Pike8 hr
May 30, 11:04 AM CDTMesoscale DiscussionSPCChampaign, Cook, DeWitt, Douglas, DuPage, Iroquois and 4 more116 min
May 30, 11:50 AM CDTTornado WatchSPCClark, Crawford, Edgar, Edwards, Gallatin, Hardin and 7 more7 hr
May 30, 12:13 PM CDTMesoscale DiscussionSPCCarroll, Hancock, Henderson, Henry, Jo Daviess, Knox and 4 more2 hr
May 30, 12:25 PM CDTTornado WatchSPCBureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 8 more7 hr
May 30, 12:53 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Christian, Fulton and 13 more2 hr
May 30, 1:05 PM CDTTornado WatchSPCAlexander, Bond, Calhoun, Cass, Champaign, Christian and 45 more6 hr
May 30, 3:16 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cass, DeKalb, DuPage and 29 more119 min
May 30, 4:25 PM CDTTornado WatchSPCBoone, Cook, DeKalb, DuPage, Grundy, Iroquois and 12 more6 hr
May 30, 5:10 PM CDTMesoscale DiscussionSPCAlexander, Bond, Clinton, Fayette, Jackson, Madison and 7 more95 min
May 30, 5:36 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cass, Champaign, Christian and 39 more54 min
May 30, 6:55 PM CDTTornado WatchSPCGallatin, Hardin, Lawrence, Wabash8 hr
May 30, 3:05 PM CDTMesoscale DiscussionSPCBartholomew, Blackford, Boone, Brown, Clark, Crawford and 47 more115 min
May 30, 3:55 PM CDTTornado WatchSPCAdams, Dearborn, Ohio, Switzerland, Union, Wayne5 hr
May 30, 11:50 AM CDTMesoscale DiscussionSPCAnderson, Bath, Bell, Bourbon, Boyle, Bracken and 54 more115 min
May 30, 1:40 PM CDTTornado WatchSPCAdair, Anderson, Barren, Bath, Bell, Bourbon and 67 more7 hr
May 30, 3:20 PM CDTTornado WatchSPCCalloway, Fulton8 hr
May 29, 8:45 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Clay, Clinton, DeKalb and 5 more60 min
May 29, 9:35 PM CDTTornado WatchSPCAndrew, Atchison, Buchanan, Caldwell, Cass, Clay and 13 more6 hr
May 29, 11:23 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 10 more67 min
May 30, 2:38 AM CDTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Cass, Clay, Clinton and 17 more97 min
May 30, 2:44 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Christian, Crawford and 26 more2 hr

Nearby

Tornado Watches in Illinois, 2004Tornado Watches in Missouri, 2004Tornado Watches in Indiana, 2004Every 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.