Alert archive / Mississippi / Tornado Watches in 2003

Tornado Watch 55

March 18, 20034 states

The Storm Prediction Center issued this tornado watch at Mar 18, 2003, 10:25 PM CST for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Mar 18, 2003, 10:25 PM CST (04:25 UTC)
Expired
Mar 19, 2003, 5:00 AM CST
In force
7 hr
Issued by
the Storm Prediction Center
All 76 counties

Baldwin County, AL, Bibb County, AL, Choctaw County, AL, Clarke County, AL, Colbert County, AL, Cullman County, AL, Dallas County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marengo County, AL, Marion County, AL, Mobile County, AL, Monroe County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Washington County, AL, Wilcox County, AL, Winston County, AL, Escambia County, FL, Washington Parish, LA, Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Itawamba County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lamar County, MS, Lauderdale County, MS, Leake County, MS, Lee County, MS, Lowndes County, MS, Marion County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pearl River County, MS, Perry County, MS, Pontotoc County, MS, Prentiss County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Wayne County, MS, Webster County, MS, Winston County, MS

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 18, 11:05 PM CSTSevere Thunderstorm WarningJANNoxubee30 min
Mar 18, 11:22 PM CSTSevere Thunderstorm WarningJANLeake43 min
Mar 18, 11:25 PM CSTSevere Thunderstorm WarningBMXJefferson65 min
Mar 18, 11:26 PM CSTSevere Thunderstorm WarningJANLowndes44 min
Mar 18, 11:30 PM CSTTornado WarningJANSmith30 min
Mar 18, 11:35 PM CSTSevere Thunderstorm WarningJANCovington40 min
Mar 18, 11:43 PM CSTSevere Thunderstorm WarningJANAttala42 min
Mar 18, 11:45 PM CSTTornado WarningJANNewton, Scott45 min
Mar 19, 1:34 AM CSTSevere Thunderstorm WarningJANLauderdale21 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

Jackson, MS (KJAN), launched 00:00Z, 4.4 hours before the alert went out and 130 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, Jackson, MS at 00:00Z on 2003-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 209 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, Jackson, MS at 00:00Z on 2003-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.1939587897117Sfc1 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
209 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
936 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 190420
SEL5
SPC WW 190425
ALZ000-FLZ000-MSZ000-191100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 55
STORM PREDICTION CENTER NORMAN OK
1025 PM CST TUE MAR 18 2003

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

   WESTERN ALABAMA                            
   EXTREME WESTERN FLORIDA PANHANDLE                            
   EASTERN MISSISSIPPI                        

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1025 PM
UNTIL 500 AM CST.

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 85 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES WEST SOUTHWEST OF MOBILE ALABAMA TO 25
MILES NORTHWEST OF MUSCLE SHOALS ALABAMA.

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 53...TORNADO WATCH NUMBER 54.  WATCH NUMBER 53...54 WILL NOT
BE IN EFFECT AFTER 1025 PM CST.

DISCUSSION...SQUALL LINE CONTINUES TO TRACK EASTWARD ACROSS CENTRAL
MS.  WIND FIELDS ARE STEADILY INCREASING OVER THIS REGION...WITH
THE THREAT OF DAMAGING WINDS IN BOW/LEWP SEGMENTS.  LOW LEVEL
VERTICAL SHEAR IS ALSO VERY STRONG...SUGGESTING A CONTINUED THREAT
OF ISOLATED TORNADOES IN ROTATING STORMS AHEAD OF OR EMBEDDED IN
LINE.

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 24035.


...HART

350,0862 303,0871 303,0900 350,0892

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 18, 6:39 PM CSTMesoscale DiscussionSPCButler, Choctaw, Clarke, Coffee, Conecuh, Covington and 13 more3 hr
Mar 18, 7:30 PM CSTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 5 more6 hr
Mar 18, 9:10 PM CSTMesoscale DiscussionSPCAutauga, Baldwin, Bibb, Choctaw, Clarke, Conecuh and 14 more3 hr
Mar 18, 11:50 PM CSTMesoscale DiscussionSPCBibb, Choctaw, Clarke, Colbert, Cullman, Fayette and 18 more115 min
Mar 19, 2:02 AM CSTMesoscale DiscussionSPCBibb, Choctaw, Clarke, Colbert, Cullman, Dallas and 22 more118 min
Mar 19, 7:10 AM CSTMesoscale DiscussionSPCMadison2 hr
Mar 19, 8:00 AM CSTTornado WatchSPCDeKalb, Jackson, Madison, Marshall, Morgan4 hr
Mar 19, 9:28 AM CSTMesoscale DiscussionSPCBlount, DeKalb, Jackson, Madison, Marshall2 hr
Mar 19, 11:30 AM CSTTornado WatchSPCDeKalb, Jackson, Marshall7 hr
Mar 19, 11:58 AM CSTMesoscale DiscussionSPCDeKalb, Etowah, Jackson, Marshall2 hr
Mar 19, 12:59 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Dale, Henry, Houston, Lee and 4 more3 hr
Mar 19, 1:30 PM CSTTornado WatchSPCAutauga, Barbour, Bullock, Butler, Calhoun, Chambers and 15 more6 hr
Mar 19, 2:06 PM CSTMesoscale DiscussionSPCCalhoun, Cherokee, DeKalb, Etowah, Jackson, Marshall and 1 more114 min
Mar 19, 3:35 PM CSTMesoscale DiscussionSPCBarbour, Chambers, Lee, Macon, Randolph, Russell and 1 more115 min
Mar 19, 3:52 PM CSTMesoscale DiscussionSPCCalhoun, Cherokee, Cleburne, DeKalb, Etowah113 min
Mar 18, 11:53 PM CSTMesoscale DiscussionSPCHamilton, Jefferson, Leon, Madison, Taylor3 hr
Mar 19, 2:08 PM CSTMesoscale DiscussionSPCBrevard, Broward, Duval, Flagler, Glades, Hardee and 17 more3 hr
Mar 19, 5:32 PM CSTMesoscale DiscussionSPCBaker, Bradford, Brevard, Clay, Duval, Flagler and 10 more118 min
Mar 18, 6:08 PM CSTMesoscale DiscussionSPCAscension, Concordia, East Baton Rouge, East Carroll, East Feliciana, Franklin and 11 more2 hr

Nearby

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