Alert archive / Alabama / Tornado Watches in 2003

Tornado Watch 283

May 7, 200322 counties in Alabama; 10 counties in Mississippi; 20 counties in Tennessee

The Storm Prediction Center issued this tornado watch at May 7, 2003, 7:35 AM CDT for 22 counties in Alabama; 10 counties in Mississippi; 20 counties in Tennessee. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 7, 2003, 7:35 AM CDT (12:35 UTC)
Expired
May 7, 2003, 1:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 52 counties

Blount County, AL, Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Kemper County, MS, Lauderdale County, MS, Lowndes County, MS, Monroe County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Scott County, MS, Winston County, MS, Bedford County, TN, Bledsoe County, TN, Cannon County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Lawrence County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Moore County, TN, Rhea County, TN, Rutherford County, TN, Sequatchie County, TN, Van Buren County, TN, Warren County, TN, White County, TN

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 7, 7:35 AM CDTTornado WarningOHXCannon, DeKalb, Wilson25 min
May 7, 8:03 AM CDTSevere Thunderstorm WarningOHXRutherford42 min
May 7, 8:20 AM CDTFlash Flood WarningHUNColbert, Franklin, Lauderdale4 hr
May 7, 8:27 AM CDTSevere Thunderstorm WarningOHXBedford, Marshall48 min
May 7, 8:52 AM CDTSevere Thunderstorm WarningOHXDeKalb, White43 min
May 7, 9:10 AM CDTFlash Flood WarningHUNLawrence, Limestone, Madison, Morgan3 hr
May 7, 9:10 AM CDTFlash Flood WarningHUNLawrence, Limestone, Madison, Morgan4 hr
May 7, 9:15 AM CDTSevere Thunderstorm WarningOHXCoffee30 min
May 7, 9:18 AM CDTSevere Thunderstorm WarningOHXBedford42 min
May 7, 9:37 AM CDTTornado Warning EmergencyMEGMonroe53 min
May 7, 10:19 AM CDTTornado WarningBMXLamar56 min
May 7, 10:23 AM CDTTornado Warning EmergencyMEGMonroe27 min
May 7, 10:24 AM CDTSevere Thunderstorm WarningJANLowndes46 min
May 7, 10:50 AM CDTFlash Flood WarningOHXBedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 25 more5 hr
May 7, 10:52 AM CDTFlash Flood WarningHUNJackson, Marshall3 hr
May 7, 11:07 AM CDTTornado WarningBMXLamar28 min
May 7, 11:17 AM CDTTornado WarningBMXFayette58 min
May 7, 11:53 AM CDTTornado WarningBMXWalker67 min
May 7, 12:37 PM CDTTornado WarningBMXJefferson53 min
May 7, 12:45 PM CDTFlash Flood WarningHUNMadison4 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

Birmingham, AL (KBMX), launched 12:00Z, 0.6 hours before the alert went out and 114 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, Birmingham, AL at 12:00Z on 2003-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1457 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, Birmingham, AL at 12:00Z on 2003-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 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
1457 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
538 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
1.3
Supercell composite
6.5

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 071236
SEL3  
SPC WW 071235
ALZ000-MSZ000-TNZ000-071800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 283 
NWS STORM PREDICTION CENTER NORMAN OK 
735 AM CDT WED MAY 7 2003

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

       NORTHERN AND WESTERN ALABAMA
       EASTERN MISSISSIPPI
       MIDDLE AND EASTERN TENNESSEE

EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 735 AM UNTIL
100 PM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 55 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES WEST NORTHWEST OF CROSSVILLE TENNESSEE TO
15 MILES SOUTHWEST OF MERIDIAN MISSISSIPPI.

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 282...


DISCUSSION...MCS WITH EMBEDDED SUPERCELLS EXPECTED TO CONTINUE EWD
THIS MORNING AS STRONG LOW LEVEL MOISTURE INFLUX CONTINUES AHEAD OF
IT.  POTENTIAL WILL EXIST FOR ISOLATED TORNADOES INVOF SMALL SCALE
LEWPS IN NRN PART OF WW...AND WITH MORE CONVENTIONAL/LONG-LIVED
SUPERCELLS NOW IN NE LA/MS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 26035.


...CORFIDI

360,0843 320,0875 320,0895 360,0863

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 6, 11:32 PM CDTMesoscale DiscussionSPCJackson, Limestone, Madison88 min
May 6, 11:50 PM CDTTornado WatchSPCColbert, Lauderdale, Lawrence, Limestone, Madison, Morgan6 hr
May 7, 1:41 AM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more3 hr
May 7, 4:55 AM CDTTornado WatchSPCLauderdale6 hr
May 7, 7:06 AM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Jackson, Lamar and 8 more114 min
May 7, 10:24 AM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 20 more2 hr
May 7, 10:35 AM CDTTornado WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 23 more5 hr
May 7, 10:50 AM CDTTornado WatchSPCSumter5 hr
May 7, 1:42 PM CDTMesoscale DiscussionSPCAutauga, Baldwin, Bullock, Butler, Choctaw, Clarke and 14 more2 hr
May 7, 2:30 PM CDTTornado WatchSPCRussell6 hr
May 7, 3:00 PM CDTTornado WatchSPCAutauga, Barbour, Bibb, Bullock, Butler, Calhoun and 30 more6 hr
May 7, 6:29 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Calhoun and 32 more91 min
May 6, 7:15 PM CDTSevere Thunderstorm WatchSPCAdams, Attala, Carroll, Choctaw, Claiborne, Clarke and 36 more5 hr
May 6, 9:53 PM CDTMesoscale DiscussionSPCAttala, Carroll, Chickasaw, Choctaw, Claiborne, Clarke and 32 more97 min
May 7, 2:27 AM CDTMesoscale DiscussionSPCAttala, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw and 36 more3 hr
May 7, 9:47 AM CDTMesoscale DiscussionSPCAdams, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 25 more118 min
May 7, 1:54 PM CDTMesoscale DiscussionSPCAttala, Carroll, Choctaw, Claiborne, Clay, Hinds and 23 more2 hr
May 7, 1:16 AM CDTMesoscale DiscussionSPCAnderson, Bedford, Benton, Bledsoe, Blount, Bradley and 49 more3 hr
May 7, 2:40 AM CDTSevere Thunderstorm WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 25 more5 hr
May 7, 4:26 AM CDTMesoscale DiscussionSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 25 more2 hr

Nearby

Tornado Watches in Alabama, 2003Tornado Watches in Tennessee, 2003Tornado Watches in Mississippi, 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.