Alert archive / Mississippi / Tornado Watches in 2001

Tornado Watch 785

October 13, 200120 parishes in Louisiana; 37 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Oct 13, 2001, 8:00 AM CDT for 20 parishes in Louisiana; 37 counties in Mississippi. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Oct 13, 2001, 8:00 AM CDT (13:00 UTC)
Expired
Oct 13, 2001, 1:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 57 counties

Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Warren County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS, Yazoo County, MS

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Oct 13, 8:08 AM CDTSevere Thunderstorm WarningLCHVermilion67 min
Oct 13, 8:10 AM CDTTornado WarningJANCopiah35 min
Oct 13, 8:31 AM CDTSevere Thunderstorm WarningLCHSaint Landry59 min
Oct 13, 8:32 AM CDTTornado WarningJANRankin43 min
Oct 13, 8:39 AM CDTTornado WarningLCHVermilion66 min
Oct 13, 8:42 AM CDTSevere Thunderstorm WarningLCHLafayette63 min
Oct 13, 8:42 AM CDTSevere Thunderstorm WarningJANAdams33 min
Oct 13, 8:57 AM CDTSevere Thunderstorm WarningJANAdams, Jefferson33 min
Oct 13, 9:00 AM CDTTornado WarningJANMadison, Yazoo30 min
Oct 13, 9:10 AM CDTTornado WarningJANAdams, Franklin50 min
Oct 13, 9:21 AM CDTSevere Thunderstorm WarningJANClaiborne, Warren29 min
Oct 13, 9:24 AM CDTSevere Thunderstorm WarningLCHSaint Martin66 min
Oct 13, 9:28 AM CDTSevere Thunderstorm WarningJANMadison, Yazoo52 min
Oct 13, 9:33 AM CDTSevere Thunderstorm WarningJANHinds57 min
Oct 13, 9:34 AM CDTTornado WarningJANJefferson41 min
Oct 13, 9:40 AM CDTSevere Thunderstorm WarningJANSimpson35 min
Oct 13, 9:43 AM CDTSevere Thunderstorm WarningLCHIberia62 min
Oct 13, 9:44 AM CDTTornado WarningJANCopiah, Lincoln46 min
Oct 13, 9:49 AM CDTSevere Thunderstorm WarningJANClaiborne26 min
Oct 13, 10:01 AM CDTSevere Thunderstorm WarningJANOktibbeha44 min
Oct 13, 10:25 AM CDTSevere Thunderstorm WarningLCHSt. Mary65 min
Oct 13, 10:26 AM CDTTornado WarningJANHinds49 min
Oct 13, 10:30 AM CDTTornado WarningJANCopiah45 min
Oct 13, 10:38 AM CDTSevere Thunderstorm WarningJANMarion37 min
Oct 13, 10:51 AM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Livingston, Saint Helena, Tangipahoa54 min
Oct 13, 10:51 AM CDTSevere Thunderstorm WarningJANMadison54 min
Oct 13, 10:55 AM CDTSevere Thunderstorm WarningJANNoxubee50 min
Oct 13, 11:06 AM CDTTornado WarningJANRankin24 min
Oct 13, 11:10 AM CDTSevere Thunderstorm WarningJANCopiah, Lincoln50 min
Oct 13, 11:13 AM CDTSevere Thunderstorm WarningLIXAmite, Pike62 min
Oct 13, 11:13 AM CDTSevere Thunderstorm WarningLIXWalthall62 min
Oct 13, 11:35 AM CDTTornado WarningLIXTangipahoa, Washington25 min
Oct 13, 11:35 AM CDTTornado WarningLIXSaint Helena25 min
Oct 13, 11:41 AM CDTSevere Thunderstorm WarningJANLowndes49 min
Oct 13, 11:49 AM CDTSevere Thunderstorm WarningJANLawrence, Simpson56 min
Oct 13, 11:54 AM CDTSevere Thunderstorm WarningJANRankin51 min
Oct 13, 12:00 PM CDTSevere Thunderstorm WarningLIXTangipahoa, Washington60 min
Oct 13, 12:28 PM CDTSevere Thunderstorm WarningLIXAscension, Livingston, Saint James, Saint John the Baptist62 min
Oct 13, 12:28 PM CDTSevere Thunderstorm WarningLIXTangipahoa62 min
Oct 13, 12:31 PM CDTSevere Thunderstorm WarningJANJefferson Davis, Marion44 min
Oct 13, 12:46 PM CDTSevere Thunderstorm WarningJANLeake, Scott, Smith59 min
Oct 13, 12:46 PM CDTSevere Thunderstorm WarningJANSimpson59 min
Oct 13, 12:46 PM CDTTornado WarningJANMarion29 min
Oct 13, 12:49 PM CDTSevere Thunderstorm WarningLIXWashington56 min
Oct 13, 12:50 PM CDTSevere Thunderstorm WarningJANCovington, Jones55 min

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.0 hours before the alert went out and 151 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, Slidell Radar S, LA at 12:00Z on 2001-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1483 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, Slidell Radar S, LA at 12:00Z on 2001-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 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
1483 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
513 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
295 m²/s²
Significant tornado parameter
1.8
Supercell composite
9.9

Open this sounding in Storm Lab

The text

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

168 
WWUS9 KMKC 131252
SEL5  

SEL5  
MKC WW 131246
LAZ000-MSZ000-CWZ000-131800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 785
STORM PREDICTION CENTER NORMAN OK
746 AM CDT SAT OCT 13 2001

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

SOUTHEAST LOUISIANA                          
CENTRAL AND SOUTHWEST MISSISSIPPI                        
ADJACENT COASTAL WATERS                     

EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 800 AM UNTIL 100
PM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
70 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 35 MILES SOUTHEAST OF INTRACOASTAL CITY LOUISIANA TO
45 MILES WEST OF COLUMBUS AFB 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 784...

DISCUSSION...SQUALL LINE CONTINUES TO MOVE EWD AROUND 30 KT TO NEAR
THE MS RIVER...WHILE ADDITIONAL CELLS ARE DEVELOPING E OF THE LINE. 
BOUNDARY LAYER DEWPOINTS WELL INTO THE 70S ARE CONTRIBUTING TO
SUFFICIENT INSTABILITY FOR SEVERE STORMS...AND VERTICAL SHEAR IS
FAVORABLE FOR SUPERCELLS.  EXPECT A THREAT OF DAMAGING WINDS AND
PERHAPS ISOLATED LARGE HAIL TO PERSIST WITH THE LINE...AS WELL AS
THE THREAT FOR A FEW TORNADOES WITH BOWING SEGMENTS AND ISOLATED
STORMS E OF THE LINE. 


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 22035.


...THOMPSON

333,0881 292,0904 292,0924 333,0901

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 12, 11:30 PM CDTTornado WatchSPCBienville, Bossier, Caddo, Claiborne, De Soto, Jackson and 4 more6 hr
Oct 13, 12:30 AM CDTTornado WatchSPCNatchitoches, Sabine, Vernon5 hr
Oct 13, 4:00 AM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 28 more5 hr
Oct 13, 12:15 PM CDTTornado WatchSPCAscension, Assumption, Jefferson, Lafourche, Livingston, Orleans and 9 more6 hr
Oct 13, 9:30 AM CDTTornado WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Clay, DeSoto and 15 more4 hr
Oct 13, 1:00 PM CDTTornado WatchSPCAlcorn, Benton, Chickasaw, Clay, Itawamba, Lee and 6 more5 hr
Oct 13, 6:00 PM CDTTornado WatchSPCGeorge, Jackson6 hr

Nearby

Tornado Watches in Mississippi, 2001Tornado Watches in Louisiana, 2001Every tornado watch in 2001

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.