Alert archive / Indiana / Tornado Watches in 2004

Tornado Watch 260

May 23, 200425 counties in Illinois; 41 counties in Indiana; 11 counties in Kentucky

The Storm Prediction Center issued this tornado watch at May 23, 2004, 10:45 AM CDT for 25 counties in Illinois; 41 counties in Indiana; 11 counties in Kentucky. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 23, 2004, 10:45 AM CDT (15:45 UTC)
Expired
May 23, 2004, 4:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 77 counties

Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Marion County, IL, Richland County, IL, Saline County, IL, Shelby County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Decatur County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Greene County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Vigo County, IN, Warrick County, IN, Washington County, IN, Breckinridge County, KY, Bullitt County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, Jefferson County, KY, Meade County, KY, Oldham County, KY, Spencer County, KY, Trimble County, KY, Union County, KY

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 23, 11:18 AM CDTSevere Thunderstorm WarningPAHJefferson42 min
May 23, 11:52 AM CDTSevere Thunderstorm WarningILXClay, Effingham, Jasper38 min
May 23, 11:54 AM CDTSevere Thunderstorm WarningPAHWayne36 min
May 23, 12:20 PM CDTSevere Thunderstorm WarningILXCumberland40 min
May 23, 12:21 PM CDTSevere Thunderstorm WarningPAHWhite39 min
May 23, 12:28 PM CDTSevere Thunderstorm WarningILXClay, Effingham, Jasper, Richland62 min
May 23, 12:35 PM CDTSevere Thunderstorm WarningILXClark, Crawford40 min
May 23, 1:11 PM CDTSevere Thunderstorm WarningINDVigo34 min
May 23, 1:27 PM CDTSevere Thunderstorm WarningINDParke, Vermillion33 min
May 23, 1:43 PM CDTSevere Thunderstorm WarningINDMontgomery, Parke32 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, 3.8 hours before the alert went out and 164 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 2004-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 435 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 2004-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.19395878Sfc1 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
435 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
621 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 231548
SEL0  
SPC WW 231545
ILZ000-INZ000-KYZ000-MOZ000-232100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 260
NWS STORM PREDICTION CENTER NORMAN OK
1045 AM CDT SUN MAY 23 2004

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

       SOUTHERN ILLINOIS
       SOUTHERN INDIANA
       NORTHWEST KENTUCKY
       EXTREME SOUTHEAST MISSOURI

EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 1045 AM UNTIL 400
PM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 20 MILES WEST NORTHWEST OF MOUNT VERNON
ILLINOIS TO 60 MILES NORTH NORTHEAST OF LOUISVILLE KENTUCKY.

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...CONTINUE...WW 259...

DISCUSSION...LINE OF STRONG THUNDERSTORMS FROM EXTREME EAST CENTRAL
IL INTO SERN MO CONTINUES TO INCREASE IN INTENSITY.  ACTIVITY IS
MOVING INTO DESTABILIZING AIR MASS WHERE MOST UNSTABLE CAPE IS
BETWEEN 2000 AND 2500 J/KG.  INITIAL THREAT IS EXPECTED TO BE LARGE
HAIL AND DAMAGING WINDS...BUT AS MID/UPPER LEVEL JET EXIT REGION
MOVING INTO AREA SHEAR WILL BECOME BETTER DEFINED INCREASING TORNADO
THREAT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.


...MCCARTHY

393,0891 400,0851 375,0851 372,0891

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 22, 8:58 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, DuPage, Grundy and 23 more92 min
May 23, 12:24 AM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 32 more66 min
May 23, 12:40 AM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 27 more5 hr
May 23, 1:21 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Greene, Jersey and 6 more24 min
May 23, 1:40 AM CDTSevere Thunderstorm WatchSPCAdams, Brown, Cass, Fulton, Hancock, Logan and 8 more4 hr
May 23, 4:30 AM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Carroll, Cass and 44 more60 min
May 23, 12:25 PM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Calhoun, Carroll, Cass and 31 more95 min
May 23, 12:45 PM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Edgar and 18 more2 hr
May 23, 1:15 PM CDTTornado WatchSPCAdams, Brown, Calhoun, Cass, Fulton, Greene and 16 more6 hr
May 23, 2:05 PM CDTTornado WatchSPCBoone, Bureau, Carroll, DeKalb, DuPage, Grundy and 18 more8 hr
May 23, 2:53 PM CDTMesoscale DiscussionSPCIroquois, Vermilion67 min
May 23, 3:50 PM CDTTornado WatchSPCCook, DuPage, Iroquois, Kankakee, Vermilion, Will6 hr
May 23, 4:35 PM CDTSevere Thunderstorm WatchSPCMonroe5 hr
May 23, 5:00 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 28 more2 hr
May 23, 5:10 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, DuPage, Grundy and 17 more95 min
May 23, 5:30 PM CDTTornado WatchSPCBond, Calhoun, Christian, Clark, Clay, Clinton and 29 more6 hr
May 23, 6:30 PM CDTMesoscale DiscussionSPCCook, DuPage, Iroquois, Kankakee, Vermilion, Will2 hr
May 23, 9:45 AM CDTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 37 more2 hr
May 23, 10:10 AM CDTTornado WatchSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 21 more6 hr
May 23, 12:35 PM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, Carroll, Cass, Clinton and 19 more115 min

Nearby

Tornado Watches in Indiana, 2004Tornado Watches in Illinois, 2004Tornado Watches in Kentucky, 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.