Alert archive / Missouri / Tornado Watches in 2003

Tornado Watch 321

May 9, 20035 states

The Storm Prediction Center issued this tornado watch at May 9, 2003, 4:45 PM CDT for 5 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2003, 4:45 PM CDT (21:45 UTC)
Expired
May 9, 2003, 11:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 84 counties

Benton County, AR, Carroll County, AR, Calhoun County, IL, Greene County, IL, Morgan County, IL, Pike County, IL, Scott County, IL, Allen County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Linn County, KS, Miami County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Audrain County, MO, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Chariton County, MO, Christian County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon 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, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Shelby County, MO, St. Clair County, MO, Stone County, MO, Vernon County, MO, Warren County, MO, Webster County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK

The radar

The Springfield radar (KSGF), 93 km from the middle of the area, began a volume at 21:48 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

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

IssuedProductOfficeCountiesLasted
May 9, 5:12 PM CDTSevere Thunderstorm WarningLSXAudrain, Monroe, Ralls48 min
May 9, 5:47 PM CDTSevere Thunderstorm WarningLSXPike, Ralls43 min
May 9, 5:51 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee54 min
May 9, 5:53 PM CDTSevere Thunderstorm WarningEAXJohnson, Lafayette52 min
May 9, 5:56 PM CDTSevere Thunderstorm WarningLSXGreene49 min
May 9, 5:59 PM CDTSevere Thunderstorm WarningLSXBoone46 min
May 9, 6:05 PM CDTSevere Thunderstorm WarningLSXAudrain, Monroe40 min
May 9, 6:10 PM CDTSevere Thunderstorm WarningILXMorgan, Scott65 min
May 9, 6:17 PM CDTTornado WarningLSXPike43 min
May 9, 6:18 PM CDTTornado WarningLSXBoone42 min
May 9, 6:28 PM CDTSevere Thunderstorm WarningEAXSaline62 min
May 9, 6:42 PM CDTTornado WarningLSXCalhoun, Pike48 min
May 9, 6:45 PM CDTSevere Thunderstorm WarningLSXGreene30 min
May 9, 6:56 PM CDTTornado WarningLSXGreene, Macoupin49 min
May 9, 6:56 PM CDTSevere Thunderstorm WarningEAXMiami64 min
May 9, 7:11 PM CDTSevere Thunderstorm WarningILXCass, Menard, Morgan, Sangamon64 min
May 9, 7:18 PM CDTSevere Thunderstorm WarningLSXAudrain42 min
May 9, 7:31 PM CDTSevere Thunderstorm WarningEAXJohnson59 min
May 9, 7:42 PM CDTTornado WarningLSXGreene, Macoupin48 min
May 9, 7:42 PM CDTSevere Thunderstorm WarningEAXLafayette63 min
May 9, 8:21 PM CDTSevere Thunderstorm WarningEAXMiami39 min
May 9, 8:22 PM CDTSevere Thunderstorm WarningEAXSaline38 min
May 9, 8:23 PM CDTSevere Thunderstorm WarningEAXHoward, Randolph67 min
May 9, 8:26 PM CDTSevere Thunderstorm WarningLSXPike, Ralls49 min
May 9, 8:31 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee59 min
May 9, 8:43 PM CDTSevere Thunderstorm WarningEAXCass62 min
May 9, 8:55 PM CDTSevere Thunderstorm WarningEAXJackson65 min
May 9, 9:02 PM CDTSevere Thunderstorm WarningLSXPike43 min
May 9, 9:04 PM CDTSevere Thunderstorm WarningEAXMiami41 min
May 9, 9:09 PM CDTSevere Thunderstorm WarningEAXLafayette66 min
May 9, 9:11 PM CDTTornado WarningLSXPike49 min
May 9, 9:11 PM CDTSevere Thunderstorm WarningEAXMacon64 min
May 9, 9:16 PM CDTFlash Flood WarningEAXCass6 hr
May 9, 9:22 PM CDTSevere Thunderstorm WarningILXMorgan, Scott53 min
May 9, 9:30 PM CDTTornado WarningEAXCass30 min
May 9, 10:00 PM CDTSevere Thunderstorm WarningICTAllen30 min
May 9, 10:01 PM CDTSevere Thunderstorm WarningEAXJackson59 min
May 9, 10:02 PM CDTSevere Thunderstorm WarningTSAWashington43 min
May 9, 10:03 PM CDTTornado WarningEAXLafayette42 min
May 9, 10:09 PM CDTSevere Thunderstorm WarningTSANowata66 min
May 9, 10:12 PM CDTSevere Thunderstorm WarningEAXCass63 min
May 9, 10:16 PM CDTTornado WarningEAXSaline59 min
May 9, 10:28 PM CDTSevere Thunderstorm WarningEAXJohnson62 min
May 9, 10:31 PM CDTSevere Thunderstorm WarningSGFBarton, Jasper44 min
May 9, 10:44 PM CDTTornado WarningEAXJohnson61 min
May 9, 10:56 PM CDTSevere Thunderstorm WarningILXMorgan, Sangamon49 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

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 92 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 2003-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2743 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2003-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
2743 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
727 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
256 m²/s²
Significant tornado parameter
3.1
Supercell composite
12.4

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 092139
SEL1  
SPC WW 092145
ILZ000-KSZ000-MOZ000-OKZ000-100400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 321 
NWS STORM PREDICTION CENTER NORMAN OK 
445 PM CDT FRI MAY 9 2003

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

       WESTERN ILLINOIS
       SOUTHEAST KANSAS
       NORTHERN AND WESTERN MISSOURI
       NORTHEAST OKLAHOMA

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 445 PM UNTIL 1100
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 100 STATUTE MILES EAST AND
WEST OF A LINE FROM 20 MILES EAST SOUTHEAST OF TULSA OKLAHOMA TO
80 MILES NORTH NORTHEAST OF COLUMBIA 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...CONTINUE...WW 317...WW 318...WW 319...WW
320...


DISCUSSION...VERY UNSTABLE AIRMASS TO E OF DRY LINE/FRONTAL ZONE
FROM SERN KS TO E OF MKC TO NEAR UIN.  SEVERE THUNDERSTORMS WILL
RAPIDLY DEVELOP  VICINITY AND E OF BOUNDARY.  40-50KT OF DEEP LAYER
SHEAR SUPPORT SUPERCELLS WITH LARGE HAIL AND TORNADOES.

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

360,0971 395,0933 395,0894 360,0934 

WWUS20 KWNS 092139
SEL1  
SPC WW 092145
ILZ000-KSZ000-MOZ000-OKZ000-100400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 321 
NWS STORM PREDICTION CENTER NORMAN OK 
445 PM CDT FRI MAY 9 2003

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

       WESTERN ILLINOIS
       SOUTHEAST KANSAS
       NORTHERN AND WESTERN MISSOURI
       NORTHEAST OKLAHOMA

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 445 PM UNTIL 1100
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 100 STATUTE MILES EAST AND
WEST OF A LINE FROM 20 MILES EAST SOUTHEAST OF TULSA OKLAHOMA TO
80 MILES NORTH NORTHEAST OF COLUMBIA 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...CONTINUE...WW 317...WW 318...WW 319...WW
320...


DISCUSSION...VERY UNSTABLE AIRMASS TO E OF DRY LINE/FRONTAL ZONE
FROM SERN KS TO E OF MKC TO NEAR UIN.  SEVERE THUNDERSTORMS WILL
RAPIDLY DEVELOP  VICINITY AND E OF BOUNDARY.  40-50KT OF DEEP LAYER
SHEAR SUPPORT SUPERCELLS WITH LARGE HAIL AND TORNADOES.

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

360,0971 395,0933 395,0894 360,0934

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 8, 7:06 PM CDTMesoscale DiscussionSPCHamilton, White54 min
May 8, 7:55 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Henderson, Pike, Scott5 hr
May 8, 9:10 PM CDTSevere Thunderstorm WatchSPCBureau, Carroll, Cass, Champaign, DeKalb, DeWitt and 32 more6 hr
May 8, 9:27 PM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Carroll, Cass, Champaign and 40 more93 min
May 8, 11:50 PM CDTMesoscale DiscussionSPCAdams, Brown, Hancock, Henderson, Pike, Scott55 min
May 9, 12:05 AM CDTSevere Thunderstorm WatchSPCBond, Brown, Calhoun, Cass, Champaign, Christian and 28 more6 hr
May 9, 2:02 PM CDTMesoscale DiscussionSPCEdwards, Lawrence, Wabash, Wayne, White2 hr
May 9, 2:48 PM CDTMesoscale DiscussionSPCClinton, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more117 min
May 9, 4:17 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 21 more28 min
May 9, 5:44 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 15 more31 min
May 9, 6:05 PM CDTTornado WatchSPCBond, Champaign, Christian, Clark, Clinton, Coles and 13 more5 hr
May 8, 7:13 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Cherokee, Crawford and 13 more2 hr
May 8, 8:30 PM CDTMesoscale DiscussionSPCButler, Chautauqua, Cowley, Elk, Greenwood, Harper and 5 more60 min
May 8, 9:00 PM CDTTornado WatchSPCAudrain, Benton, Boone, Callaway, Camden, Cole and 26 more5 hr
May 8, 11:14 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Garvin, Haskell and 16 more91 min
May 9, 2:52 PM CDTMesoscale DiscussionSPCCaddo, Carter, Cleveland, Comanche, Cotton, Creek and 15 more113 min
May 9, 3:35 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 18 more5 hr
May 9, 5:36 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 17 more84 min

Nearby

Tornado Watches in Missouri, 2003Tornado Watches in Kansas, 2003Tornado Watches in Oklahoma, 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; radar from the NEXRAD Level II archive.