Alert archive / Louisiana / Tornado Watches in 2005

Tornado Watch 867

November 15, 200534 parishes in Louisiana; 19 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Nov 15, 2005, 12:09 PM CST for 34 parishes in Louisiana; 19 counties in Mississippi. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Nov 15, 2005, 12:09 PM CST (18:09 UTC)
Expired
Nov 15, 2005, 7:00 PM CST
In force
7 hr
Issued by
the Storm Prediction Center
All 53 counties

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Richland Parish, LA, Saint Landry Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Hinds County, MS, Issaquena County, MS, Jefferson County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Warren County, MS, Wilkinson County, MS, Yazoo County, MS

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Nov 15, 1:00 PM CSTSevere Thunderstorm WarningLCHVernon60 min
Nov 15, 3:30 PM CSTTornado WarningSHVOuachita45 min
Nov 15, 3:30 PM CSTSevere Thunderstorm WarningJANCopiah, Jefferson60 min
Nov 15, 3:36 PM CSTSevere Thunderstorm WarningSHVWinn54 min
Nov 15, 3:47 PM CSTSevere Thunderstorm WarningLCHBeauregard58 min
Nov 15, 3:58 PM CSTSevere Thunderstorm WarningJANHinds, Warren62 min
Nov 15, 4:08 PM CSTTornado WarningJANHinds52 min
Nov 15, 4:16 PM CSTSevere Thunderstorm WarningJANMorehouse38 min
Nov 15, 4:43 PM CSTSevere Thunderstorm WarningJANClaiborne32 min
Nov 15, 4:46 PM CSTTornado WarningJANMadison44 min
Nov 15, 5:00 PM CSTSevere Thunderstorm WarningJANCopiah45 min
Nov 15, 5:05 PM CSTSevere Thunderstorm WarningLCHCalcasieu55 min
Nov 15, 5:08 PM CSTSevere Thunderstorm WarningJANConcordia67 min
Nov 15, 5:34 PM CSTSevere Thunderstorm WarningJANHinds26 min
Nov 15, 6:00 PM CSTSevere Thunderstorm WarningJANFranklin45 min
Nov 15, 6:10 PM CSTSevere Thunderstorm WarningJANJefferson50 min
Nov 15, 6:23 PM CSTSevere Thunderstorm WarningLIXWilkinson67 min
Nov 15, 6:39 PM CSTTornado WarningLIXWilkinson36 min
Nov 15, 6:44 PM CSTSevere Thunderstorm WarningJANCopiah, Franklin, Lawrence, Lincoln76 min
Nov 15, 6:58 PM CSTSevere Thunderstorm WarningLIXIberville, Pointe Coupee, West Baton Rouge, West Feliciana47 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 12:00Z, 6.2 hours before the alert went out and 168 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 12:00Z on 2005-11-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 711 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 12:00Z on 2005-11-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 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
711 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
624 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
271 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.6

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 151803
SEL7  
SPC WW 151803
LAZ000-MSZ000-160100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 867
NWS STORM PREDICTION CENTER NORMAN OK
1205 PM CST TUE NOV 15 2005

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

       CENTRAL AND NORTHEAST LOUISIANA
       SOUTHWEST AND CENTRAL MISSISSIPPI

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1205 PM UNTIL
700 PM CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE MILES
EAST AND WEST OF A LINE FROM 65 MILES NORTHWEST OF JACKSON
MISSISSIPPI TO 70 MILES SOUTHEAST OF FORT POLK LOUISIANA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).

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 864...WW 865...WW 866...

DISCUSSION...SCATTERED THUNDERSTORMS ARE SLOWLY INCREASING OVER LA
IN MOIST/UNSTABLE AIR MASS.  CONVECTIVE THREAT WILL LIKELY CONTINUE
TO INCREASE IN COVERAGE THROUGH THE AFTERNOON AS COLD FRONT
APPROACHES FROM THE WEST.  STRONG VERTICAL SHEAR PROFILES WILL POSE
A RISK OF ISOLATED SUPERCELLS CAPABLE OF DAMAGING WINDS AND
TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.


...HART

325,0891 301,0904 301,0935 325,0923

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 15, 9:31 AM CSTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 48 more119 min
Nov 15, 3:17 PM CSTMesoscale DiscussionSPCAllen, Avoyelles, Beauregard, Caldwell, Catahoula, Concordia and 19 more88 min
Nov 15, 7:42 AM CSTTornado WatchSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 33 more9 hr
Nov 15, 10:13 AM CSTMesoscale DiscussionSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 33 more2 hr
Nov 15, 12:34 PM CSTMesoscale DiscussionSPCAlcorn, Benton, Bolivar, Calhoun, Carroll, Chickasaw and 22 more116 min
Nov 15, 2:55 PM CSTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 27 more65 min
Nov 15, 3:15 PM CSTTornado WatchSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 25 more8 hr
Nov 15, 5:58 PM CSTMesoscale DiscussionSPCAlcorn, Prentiss, Tishomingo92 min

Nearby

Tornado Watches in Louisiana, 2005Tornado Watches in Mississippi, 2005Every tornado watch in 2005

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.