Alert archive / Mississippi / Tornado Watches in 2000

Tornado Watch 791

November 9, 20004 states

The Storm Prediction Center issued this tornado watch at Nov 9, 2000, 12:00 AM CST for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Nov 9, 2000, 12:00 AM CST (06:00 UTC)
Expired
Nov 9, 2000, 5:00 AM CST
In force
5 hr
Issued by
the Storm Prediction Center
All 51 counties

Autauga County, AL, Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Escambia County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Santa Rosa County, FL, Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Scott County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 74 km from the middle of the area, began a volume at 06:02 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

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

IssuedProductOfficeCountiesLasted
Nov 9, 12:18 AM CSTSevere Thunderstorm WarningLIXWashington27 min
Nov 9, 12:31 AM CSTTornado WarningLIXWashington29 min
Nov 9, 12:44 AM CSTSevere Thunderstorm WarningJANCovington46 min
Nov 9, 12:54 AM CSTFlash Flood WarningJANCovington, Jefferson Davis, Lawrence, Marion3 hr
Nov 9, 12:58 AM CSTTornado WarningJANLamar32 min
Nov 9, 1:00 AM CSTSevere Thunderstorm WarningJANMarion30 min
Nov 9, 1:25 AM CSTTornado WarningMOBClarke, Wilcox35 min
Nov 9, 1:25 AM CSTTornado WarningJANForrest, Lamar50 min
Nov 9, 1:35 AM CSTSevere Thunderstorm WarningLIXHarrison55 min
Nov 9, 2:19 AM CSTSevere Thunderstorm WarningMOBEscambia, Santa Rosa26 min
Nov 9, 2:28 AM CSTSevere Thunderstorm WarningLIXJackson62 min
Nov 9, 2:52 AM CSTTornado WarningBMXDallas38 min
Nov 9, 2:52 AM CSTSevere Thunderstorm WarningMOBEscambia23 min
Nov 9, 2:58 AM CSTSevere Thunderstorm WarningJANClarke32 min
Nov 9, 3:07 AM CSTSevere Thunderstorm WarningMOBChoctaw23 min
Nov 9, 3:24 AM CSTSevere Thunderstorm WarningMOBWashington36 min
Nov 9, 3:39 AM CSTTornado WarningMOBMobile36 min
Nov 9, 4:33 AM CSTSevere Thunderstorm WarningMOBClarke, Wilcox42 min

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 6.0 hours before the alert went out and 73 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 00:00Z on 2000-11-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 709 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 00:00Z on 2000-11-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 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
709 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
796 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.4

Open this sounding in Storm Lab

The text

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

048 
WWUS9 KMKC 090542
SEL1  

SEL1  
MKC WW 090536
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-091100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 791
STORM PREDICTION CENTER NORMAN OK
1136 PM CST WED NOV 8 2000

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

   SOUTHERN AND WESTERN ALABAMA                            
   THE WESTERN FLORIDA PANHANDLE                            
   SOUTHEAST LOUISIANA                          
   SOUTHEAST MISSISSIPPI                        
   COASTAL WATERS                     

EFFECTIVE THIS THURSDAY MORNING FROM MIDNIGHT CST UNTIL 500 AM 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 110 STATUTE MILES EAST AND WEST
OF A LINE FROM 20 MILES SOUTH SOUTHEAST OF BOOTHVILLE LOUISIANA TO
40 MILES WEST NORTHWEST OF SELMA 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 788...TORNADO WATCH NUMBER 789.  WATCH NUMBER 788...789 WILL
NOT BE IN EFFECT AFTER MIDNIGHT CST.  CONTINUE...WW 790...

DISCUSSION...E TX SHORTWAVE TROUGH WILL ROTATE NE INTO LA BETWEEN
NOW AND 12Z THURSDAY...ENHANCING DEEP-LAYER SPEED/DIRECTIONAL SHEAR
ACROSS WATCH REGION.  AMPLE BOUNDARY LAYER MOISTURE AND DEEP-LAYER
CONFLUENCE PRESENT TO SUPPORT ADDITIONAL THUNDERSTORM DEVELOPMENT
THROUGH THE EARLY MORNING.  BROKEN LINES/CLUSTERS OF STORMS WILL
LIKELY CONTAIN EMBEDDED SUPERCELLS WITH 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 550. 
MEAN STORM MOTION VECTOR 21035.

...CORFIDI

323,0854 290,0872 290,0910 323,0893

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 8, 8:00 PM CSTTornado WatchSPCChoctaw, Colbert, Cullman, Fayette, Franklin, Greene and 15 more6 hr
Nov 8, 11:30 PM CSTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 21 more6 hr
Nov 9, 3:15 AM CSTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 21 more5 hr
Nov 9, 4:30 AM CSTTornado WatchSPCBarbour, Butler, Coffee, Conecuh, Covington, Crenshaw and 8 more6 hr
Nov 9, 10:00 AM CSTTornado WatchSPCHenry, Houston5 hr
Nov 8, 6:00 PM CSTTornado WatchSPCAcadia, Ascension, Assumption, Avoyelles, East Baton Rouge, East Feliciana and 24 more6 hr

Nearby

Tornado Watches in Mississippi, 2000Tornado Watches in Alabama, 2000Tornado Watches in Louisiana, 2000Every 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.