Alert archive / Illinois / Tornado Watches in 2004

Tornado Watch 305

May 26, 20044 states

The Storm Prediction Center issued this tornado watch at May 26, 2004, 8:55 PM CDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 26, 2004, 8:55 PM CDT (01:55 UTC)
Expired
May 27, 2004, 2:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 50 counties

Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Gibson County, IN, Pike County, IN, Posey County, IN, Vanderburgh County, IN, Warrick County, IN, Crittenden County, KY, Daviess County, KY, Henderson County, KY, Hopkins County, KY, Livingston County, KY, McLean County, KY, Muhlenberg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Cape Girardeau County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Perry County, MO, Reynolds County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 111 km from the middle of the area, began a volume at 01:56 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

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

IssuedProductOfficeCountiesLasted
May 26, 9:05 PM CDTSevere Thunderstorm WarningPAHEdwards, White55 min
May 26, 9:35 PM CDTSevere Thunderstorm WarningPAHPosey40 min
May 26, 9:49 PM CDTSevere Thunderstorm WarningPAHVanderburgh41 min
May 26, 10:04 PM CDTSevere Thunderstorm WarningPAHWarrick41 min
May 26, 10:10 PM CDTSevere Thunderstorm WarningPAHDaviess, Henderson65 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 00:00Z, 1.9 hours before the alert went out and 258 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 00:00Z on 2004-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2004-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -75 square meters per square second.1939587897117136156Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1412 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
-75 m²/s²
0-3 km storm-relative helicity
67 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.

000
WWUS20 KWNS 270155
SEL5  
SPC WW 270155
ILZ000-INZ000-KYZ000-MOZ000-270700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 305
NWS STORM PREDICTION CENTER NORMAN OK
855 PM CDT WED MAY 26 2004

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

       SOUTHERN ILLINOIS
       SOUTHWEST INDIANA
       WESTERN KENTUCKY
       EAST CENTRAL MISSOURI

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 855 PM
UNTIL 200 AM CDT.

TORNADOES...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 45 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 120 MILES WEST NORTHWEST OF CAPE GIRARDEAU
MISSOURI TO 10 MILES NORTHEAST OF OWENSBORO 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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 294...SEVERE THUNDERSTORM WATCH NUMBER 296. WATCH
NUMBER 294 296 WILL NOT BE IN EFFECT AFTER 855 PM CDT.
CONTINUE...WW 297...WW 298...WW 299...WW 300...WW 301...WW
302...WW 303...WW 304...

DISCUSSION...CLUSTER OF STRONG/SEVERE STORMS OVER SOUTHERN IL WILL
CONTINUE TO TRACK SOUTHEASTWARD FOR ANOTHER FEW HOURS INTO SOUTHWEST
IND AND WESTERN KY.  OTHER STORMS ARE INCREASING ALONG THE KS/MO
BORDER AND MAY SPREAD INTO WATCH AREA LATER TONIGHT.  STRONG LOW
LEVEL WARM ADVECTION NEAR SURFACE WARM FRONT...COUPLED WITH MODERATE
INSTABILITY...WILL PROMOTE SUPERCELL STORMS CAPABLE OF LARGE HAIL
AND ISOLATED TORNADOES.

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 28035.


...HART

383,0913 382,0870 370,0870 371,0913

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 26, 7:57 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more63 min
May 26, 9:36 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 25 more54 min
May 26, 11:14 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more2 hr
May 27, 1:53 AM CDTMesoscale DiscussionSPCChristian, Clark, Clay, Coles, Crawford, Cumberland and 9 more3 hr
May 27, 11:10 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Christian, DeWitt and 25 more2 hr
May 27, 11:55 AM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Henderson, McDonough, Pike and 3 more6 hr
May 27, 1:07 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, DeWitt, Douglas, Edgar and 12 more113 min
May 27, 1:30 PM CDTSevere Thunderstorm WatchSPCCass, Champaign, Christian, Coles, DeWitt, Douglas and 22 more7 hr
May 27, 1:52 PM CDTMesoscale DiscussionSPCAdams, Calhoun, Greene, Jersey, Macoupin, Pike and 1 more113 min
May 27, 2:25 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Clinton, Fayette, Franklin, Greene and 12 more7 hr
May 27, 3:12 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 13 more2 hr
May 27, 3:37 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clay, Clinton, Edwards, Effingham and 22 more113 min
May 27, 4:00 PM CDTSevere Thunderstorm WatchSPCClark, Clay, Crawford, Cumberland, Edwards, Effingham and 7 more4 hr
May 27, 5:01 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Fayette, Greene, Jackson and 11 more89 min
May 27, 6:00 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Douglas, Edgar, Macon, Morgan and 4 more90 min
May 27, 6:35 PM CDTMesoscale DiscussionSPCOhio, Switzerland25 min
May 27, 6:55 PM CDTTornado WatchSPCJefferson, Ohio, Switzerland5 hr
May 27, 6:22 PM CDTMesoscale DiscussionSPCAnderson, Bath, Bourbon, Carroll, Clark, Fayette and 16 more53 min
May 26, 8:29 PM CDTMesoscale DiscussionSPCMcDonald91 min
May 26, 8:30 PM CDTTornado WatchSPCBarton, Bates, Benton, Camden, Cedar, Dade and 15 more6 hr
May 26, 11:40 PM CDTSevere Thunderstorm WatchSPCCass, Clay, Cooper, Henry, Howard, Jackson and 6 more5 hr
May 27, 1:16 AM CDTMesoscale DiscussionSPCCarroll, Cass, Clay, Cooper, Howard, Jackson and 6 more119 min
May 27, 1:50 AM CDTTornado WatchSPCBarton, Camden, Cedar, Christian, Dade, Dallas and 15 more4 hr
May 27, 3:27 AM CDTMesoscale DiscussionSPCCedar, Christian, Dade, Dallas, Douglas, Greene and 12 more2 hr
May 27, 3:55 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Carroll, Cass and 14 more95 min

Nearby

Tornado Watches in Illinois, 2004Tornado Watches in Missouri, 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; radar from the NEXRAD Level II archive.