Alert archive / Louisiana / Tornado Watches in 2000

Tornado Watch 806

November 24, 20004 states

The Storm Prediction Center issued this tornado watch at Nov 24, 2000, 9:00 AM CST for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Nov 24, 2000, 9:00 AM CST (15:00 UTC)
Expired: Nov 24, 2000, 2:00 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 23 counties

Baldwin County, AL, Mobile County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, George County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 92 km from the middle of the area, began a volume at 15:03 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

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

Issued	Product	Office	Counties	Lasted
Nov 24, 9:04 AM CST	Severe Thunderstorm Warning	MOB	Mobile	41 min
Nov 24, 9:15 AM CST	Severe Thunderstorm Warning	LIX	Harrison	30 min
Nov 24, 9:41 AM CST	Tornado Warning	LIX	Harrison	34 min
Nov 24, 9:48 AM CST	Severe Thunderstorm Warning	LIX	Jackson	27 min
Nov 24, 10:16 AM CST	Tornado Warning	MOB	Mobile	29 min
Nov 24, 10:41 AM CST	Severe Thunderstorm Warning	MOB	George, Greene	34 min
Nov 24, 10:44 AM CST	Tornado Warning	MOB	Mobile	16 min
Nov 24, 11:00 AM CST	Tornado Warning	MOB	Mobile	30 min
Nov 24, 11:06 AM CST	Severe Thunderstorm Warning	LIX	Jackson	39 min
Nov 24, 11:12 AM CST	Tornado Warning	MOB	Baldwin	48 min
Nov 24, 11:44 AM CST	Severe Thunderstorm Warning	MOB	Mobile	31 min
Nov 24, 1:08 PM CST	Tornado Warning	MOB	Baldwin	37 min
Nov 24, 1:33 PM CST	Tornado Warning	MOB	Escambia, Santa Rosa	42 min

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.0 hours before the alert went out and 56 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 265 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 623 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 421 m²/s²
0-3 km storm-relative helicity: 552 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

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

409 
WWUS9 KMKC 241447
SEL6  

SEL6  
MKC WW 241442
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-242000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 806
STORM PREDICTION CENTER NORMAN OK
842 AM CST FRI NOV 24 2000

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

   EXTREME SOUTHERN ALABAMA                            
   WESTERN FLORIDA PANHANDLE                           
   SOUTHEAST LOUISIANA                          
   EXTREME SOUTHERN MISSISSIPPI                        
   AND ADJACENT COASTAL WATERS                     

EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 900 AM UNTIL 200
PM CST.

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 55 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 40 MILES WEST NORTHWEST OF NEW ORLEANS
LOUISIANA TO 40 MILES SOUTH OF CRESTVIEW FLORIDA.

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.


DISCUSSION...SCATTERED SUPERCELL THUNDERSTORMS CONTINUE TO INCREASE
ALONG THE LA/MS/AL COAST.  THESE STORMS WILL TRACK NORTHWARD AND
INLAND DURING THE NEXT FEW HOURS.  SURFACE WARM FRONT WILL ALSO
SHIFT NORTHWARD...DESTABILIZING SOUTHERN MS/AL.  LOCAL VAD AND 12Z
SOUNDING DATA INDICATE A VERY FAVORABLE SHEAR PROFILE FOR ISOLATED
TORNADOES.

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 450. 
MEAN STORM MOTION VECTOR 20035.

...HART

310,0905 310,0863 292,0863 292,0905

Nearby

Tornado Watches in Louisiana, 2000 Tornado Watches in Mississippi, 2000 Tornado Watches in Florida, 2000 Every tornado watch in 2000

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.