Alert archive / Louisiana / Tornado Watches in 2002

Tornado Watch 730

October 27, 200222 parishes in Louisiana

The Storm Prediction Center issued this tornado watch at Oct 27, 2002, 1:00 PM CST for 22 parishes in Louisiana. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Oct 27, 2002, 1:00 PM CST (19:00 UTC)
Expired: Oct 27, 2002, 6:00 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 22 counties

Acadia Parish, LA, Allen Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Pointe Coupee Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.0 hours before the alert went out and 79 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: 26 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 478 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 271858
SEL0  
SPC WW 271900
LAZ000-CWZ000-280000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 730
STORM PREDICTION CENTER NORMAN OK
100 PM CST SUN OCT 27 2002

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

   SOUTHERN LOUISIANA                          
   AND ADJACENT COASTAL WATERS                     

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 600
PM CST.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 20 MILES NORTHWEST OF LAKE CHARLES LOUISIANA
TO 35 MILES SOUTH SOUTHEAST OF BATON ROUGE LOUISIANA.

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...REMNANT CIRCULATION OF KENNA IS TRACKING NORTHEASTWARD
AND SHOULD MOVE INTO SOUTHERN LA THIS AFTERNOON.  RELATIVELY STRONG
LOW LEVEL VERTICAL SHEAR PROFILES...COMBINED WITH VERY MOIST/
MODERATELY UNSTABLE AIRMASS SUGGESTS A THREAT OF SUPERCELLS CAPABLE
OF DAMAGING WINDS AND BRIEF TORNADOES THROUGH THE AFTENROON.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 21025.

...HART

311,0932 310,0905 290,0905 292,0932

Nearby

Tornado Watches in Louisiana, 2002 Every tornado watch in 2002

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.