Alert archive / Missouri / Tornado Watches in 2004

Tornado Watch 565

July 5, 200421 counties in Illinois; 52 counties in Missouri

The Storm Prediction Center issued this tornado watch at Jul 5, 2004, 4:00 PM CDT for 21 counties in Illinois; 52 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 5, 2004, 4:00 PM CDT (21:00 UTC)
Expired
Jul 5, 2004, 10:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 73 counties

Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Jersey County, IL, Logan County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Peoria County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Audrain County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cass County, MO, Cedar County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, Lewis County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Shelby County, MO, St. Clair County, MO, Vernon County, MO, Warren County, MO, Webster County, MO

The radar

The Pleasant Hill radar (KEAX), 149 km from the middle of the area, began a volume at 21:00 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

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

IssuedProductOfficeCountiesLasted
Jul 5, 4:17 PM CDTSevere Thunderstorm WarningSGFSt. Clair73 min
Jul 5, 6:09 PM CDTSevere Thunderstorm WarningSGFCamden, Laclede66 min
Jul 5, 6:45 PM CDTSevere Thunderstorm WarningSGFPulaski60 min
Jul 5, 6:58 PM CDTSevere Thunderstorm WarningSGFMaries, Phelps62 min
Jul 5, 7:14 PM CDTSevere Thunderstorm WarningLSXSaint Charles61 min
Jul 5, 7:40 PM CDTSevere Thunderstorm WarningLSXFranklin35 min
Jul 5, 7:40 PM CDTSevere Thunderstorm WarningLSXSaint Louis50 min
Jul 5, 7:53 PM CDTSevere Thunderstorm WarningLSXCity of Saint Louis37 min
Jul 5, 7:55 PM CDTSevere Thunderstorm WarningLSXCrawford, Franklin, Gasconade, Washington50 min
Jul 5, 8:07 PM CDTSevere Thunderstorm WarningLSXMadison, Saint Clair53 min
Jul 5, 8:28 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis62 min
Jul 5, 8:41 PM CDTTornado WarningLSXMadison34 min
Jul 5, 9:07 PM CDTSevere Thunderstorm WarningILXFulton68 min
Jul 5, 9:25 PM CDTTornado WarningILXFulton65 min
Jul 5, 9:30 PM CDTFlash Flood WarningLSXMadison, Saint Clair4 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

Springfield, MO (KSGF), launched 12:00Z, 9.0 hours before the alert went out and 235 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, Springfield, MO at 12:00Z on 2004-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1923 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, Springfield, MO at 12:00Z on 2004-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 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
1923 J/kg
Mixed-layer CIN
-140 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
212 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.2

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 052058
SEL5  
SPC WW 052100
ILZ000-MOZ000-060300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 565
NWS STORM PREDICTION CENTER NORMAN OK
400 PM CDT MON JUL 5 2004

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

       WESTERN ILLINOIS
       PARTS OF MISSOURI

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 1000
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 25 MILES NORTH NORTHWEST OF JOPLIN MISSOURI
TO 25 MILES NORTHEAST OF SPRINGFIELD ILLINOIS.

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 562...WW 563...WW 564...

DISCUSSION...WITH VERY UNSTABLE AIR MASS ACROSS CENTRAL/SRN MO AND
40-50 KT OF DEEP LAYER SHEAR...THUNDERSTORMS EXPECTED TO RAPIDLY
DEVELOP SWRN MO AND MOVE NEWD. WITH AVAILABLE SHEAR AND INSTABILITY
SUPERCELLS EXPECTED INCREASING THREAT OF TORNADOES AND LARGE HAIL. 
ACTIVITY WILL CONTINUE DEVELOPING NEWD ALONG AND N OF RETURNING
OUTFLOW BOUNDARY THAT EXTENDS EWD ACROSS ERN MO.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.
MEAN STORM MOTION VECTOR 24035.


...HALES

383,0944 411,0891 385,0891 362,0944

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 6:55 AM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Christian, Clinton, Coles, Cumberland and 12 more4 hr
Jul 5, 9:12 AM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clark, Clay, Clinton and 34 more63 min
Jul 5, 9:45 AM CDTSevere Thunderstorm WatchSPCClay, Edwards, Franklin, Gallatin, Hamilton, Jackson and 8 more4 hr
Jul 5, 12:08 PM CDTMesoscale DiscussionSPCEdwards, Hardin, Lawrence, Richland, Wabash67 min
Jul 5, 3:00 PM CDTMesoscale DiscussionSPCAdams, Brown, Hancock, Henderson, McDonough, Mercer and 3 more60 min
Jul 5, 3:43 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Jackson, Jersey, Madison and 5 more92 min
Jul 5, 4:20 PM CDTTornado WatchSPCBureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 9 more6 hr
Jul 5, 6:30 PM CDTMesoscale DiscussionSPCBureau, Carroll, Henry, Jo Daviess, Mercer, Rock Island and 1 more60 min
Jul 5, 1:16 AM CDTMesoscale DiscussionSPCAtchison, Holt, Nodaway89 min
Jul 5, 2:00 AM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Bates, Buchanan, Caldwell and 36 more5 hr
Jul 5, 3:25 AM CDTSevere Thunderstorm WatchSPCBarry, Barton, Bates, Benton, Camden, Cedar and 27 more6 hr
Jul 5, 4:45 AM CDTMesoscale DiscussionSPCAdair, Andrew, Bates, Caldwell, Carroll, Cass and 30 more2 hr
Jul 5, 6:02 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Camden, Cedar and 32 more88 min

Nearby

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