Alert archive / Missouri / Tornado Watches in 2003

Tornado Watch 238

May 4, 2003Doniphan County, Wyandotte County, Kansas; 40 counties in Missouri

The Storm Prediction Center issued this tornado watch at May 4, 2003, 6:20 PM CDT for Doniphan County, Wyandotte County, Kansas; 40 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 4, 2003, 6:20 PM CDT (23:20 UTC)
Expired
May 5, 2003, 12:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 42 counties

Doniphan County, KS, Wyandotte County, KS, Andrew County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Henry County, MO, Holt County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Nodaway County, MO, Pettis County, MO, Platte County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Sullivan County, MO, Worth County, MO

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 4, 6:34 PM CDTSevere Thunderstorm WarningEAXDaviess, DeKalb56 min
May 4, 7:04 PM CDTSevere Thunderstorm WarningEAXHarrison41 min
May 4, 7:10 PM CDTTornado WarningEAXPettis50 min
May 4, 7:18 PM CDTTornado WarningEAXJohnson27 min
May 4, 7:29 PM CDTSevere Thunderstorm WarningEAXJohnson61 min
May 4, 7:34 PM CDTSevere Thunderstorm WarningEAXMercer41 min
May 4, 7:39 PM CDTSevere Thunderstorm WarningEAXGrundy51 min
May 4, 7:53 PM CDTTornado WarningSGFMiller52 min
May 4, 7:54 PM CDTTornado WarningEAXSaline51 min
May 4, 8:01 PM CDTSevere Thunderstorm WarningEAXPettis44 min
May 4, 8:21 PM CDTSevere Thunderstorm WarningEAXClay39 min
May 4, 8:21 PM CDTSevere Thunderstorm WarningEAXDaviess54 min
May 4, 8:34 PM CDTSevere Thunderstorm WarningEAXJohnson, Wyandotte56 min
May 4, 8:47 PM CDTSevere Thunderstorm WarningEAXRay58 min
May 4, 9:12 PM CDTSevere Thunderstorm WarningEAXCarroll63 min
May 4, 9:20 PM CDTSevere Thunderstorm WarningEAXCass40 min
May 4, 9:24 PM CDTSevere Thunderstorm WarningEAXLafayette66 min
May 4, 9:32 PM CDTSevere Thunderstorm WarningEAXBates43 min
May 4, 9:53 PM CDTSevere Thunderstorm WarningEAXSaline52 min
May 4, 10:00 PM CDTSevere Thunderstorm WarningEAXJohnson60 min
May 4, 10:01 PM CDTSevere Thunderstorm WarningEAXChariton44 min
May 4, 10:05 PM CDTSevere Thunderstorm WarningEAXHenry55 min
May 4, 10:14 PM CDTSevere Thunderstorm WarningEAXBates31 min
May 4, 10:26 PM CDTSevere Thunderstorm WarningEAXMacon49 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

Topeka, KS (KTOP), launched 12:00Z, 11.3 hours before the alert went out and 195 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, Topeka, KS at 12:00Z on 2003-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 409 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, Topeka, KS at 12:00Z on 2003-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 582 square meters per square second.1939587897Sfc1 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
409 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
582 m²/s²
0-3 km storm-relative helicity
841 m²/s²
Significant tornado parameter
0.0
Supercell composite
17.5

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 042317
SEL8  
SPC WW 042320
MOZ000-050500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 238 
NWS STORM PREDICTION CENTER NORMAN OK 
620 PM CDT SUN MAY 4 2003

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

       NORTHWEST MISSOURI

EFFECTIVE THIS SUNDAY NIGHT FROM 620 PM UNTIL MIDNIGHT 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 70 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES NORTHWEST OF SPICKARD MISSOURI TO 45 MILES
SOUTH SOUTHEAST OF KNOB NOSTER 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 233. WATCH NUMBER 233 WILL NOT BE IN EFFECT AFTER 620
PM CDT. CONTINUE...WW 234...WW 235...WW 236...WW 237...


DISCUSSION...SUPERCELLS WILL PERSIST FOR THE NEXT FEW HOURS ALONG
AND E OF THE DRYLINE IN THE WARM SECTOR ACROSS NW MO.  THE THREAT
FOR SIGNIFICANT TORNADOES WILL CONTINUE FOR THE NEXT 2-3
HOURS...BEFORE GRADUALLY DIMINISHING LATER THIS EVENING AS
INSTABILITY IS EXHAUSTED BY THE ONGOING STORMS IN THE RELATIVELY
NARROW WARM SECTOR.

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 26040.


...THOMPSON

403,0924 380,0915 380,0943 403,0952

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 11:07 PM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Clark, Clay and 43 more83 min
May 3, 11:46 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Clay and 30 more59 min
May 4, 12:10 AM CDTSevere Thunderstorm WatchSPCAnderson, Atchison, Brown, Chase, Clay, Coffey and 24 more6 hr
May 4, 2:58 AM CDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Coffey, Doniphan, Douglas and 13 more92 min
May 4, 4:50 AM CDTSevere Thunderstorm WatchSPCDoniphan, Wyandotte6 hr
May 4, 7:43 AM CDTMesoscale DiscussionSPCDoniphan2 hr
May 4, 10:19 AM CDTMesoscale DiscussionSPCAtchison, Butler, Chase, Clay, Coffey, Dickinson and 19 more116 min
May 4, 11:40 AM CDTTornado WatchSPCAnderson, Chase, Clay, Cloud, Coffey, Dickinson and 19 more6 hr
May 4, 11:44 AM CDTMesoscale DiscussionSPCChautauqua, Cherokee, Crawford, Labette, Montgomery, Neosho and 1 more3 hr
May 4, 12:14 PM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Jackson, Jefferson and 7 more2 hr
May 4, 12:35 PM CDTTornado WatchSPCAllen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 6 more6 hr
May 4, 12:45 PM CDTTornado WatchSPCAtchison, Brown, Doniphan, Douglas, Jefferson, Johnson and 4 more6 hr
May 4, 2:22 PM CDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Coffey, Doniphan, Douglas and 13 more113 min
May 4, 2:58 PM CDTMesoscale DiscussionSPCEllis, Gove, Jewell, Lane, Lincoln, Mitchell and 9 more92 min
May 4, 3:05 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Cherokee, Crawford, Labette, Montgomery and 1 more115 min
May 4, 4:28 PM CDTMesoscale DiscussionSPCWyandotte62 min
May 4, 4:43 PM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Labette, Linn, Neosho2 hr
May 4, 6:05 PM CDTTornado WatchSPCBourbon, Cherokee, Crawford7 hr
May 4, 3:56 PM CDTMesoscale DiscussionSPCAdair, Chariton, Grundy, Harrison, Linn, Livingston and 6 more2 hr
May 4, 5:01 PM CDTMesoscale DiscussionSPCButler, Dunklin, Mississippi, New Madrid, Pemiscot, Stoddard3 hr
May 4, 5:20 PM CDTMesoscale DiscussionSPCBarry, Barton, Cedar, Christian, Dade, Dallas and 18 more55 min
May 4, 5:25 PM CDTSevere Thunderstorm WatchSPCAdair, Audrain, Bollinger, Callaway, Cape Girardeau, Clark and 28 more6 hr
May 4, 6:55 PM CDTTornado WatchSPCButler, Dunklin, Mississippi, New Madrid, Pemiscot, Scott and 2 more6 hr

Nearby

Tornado Watches in Missouri, 2003Tornado Watches in Kansas, 2003Every tornado watch in 2003

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.