Alert archive / Louisiana / Tornado Warnings in 1986

Tornado Warning 3, NWS New Orleans, LA

November 20, 1986East Baton Rouge Parish, East Feliciana Parish, Saint Helena Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Nov 20, 1986, 5:06 AM CST for East Baton Rouge Parish, East Feliciana Parish, Saint Helena Parish, Louisiana. It was in force for 54 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Nov 20, 1986, 5:06 AM CST (11:06 UTC)
Expired
Nov 20, 1986, 6:00 AM CST
In force
54 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Saint Helena Parish, LA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Nov 20, 5:10 AM CSTThunderstorm Wind 0East Baton Rouge, LA
Nov 20, 5:20 AM CSTThunderstorm Wind 0East Baton Rouge, LA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 11.1 hours before the alert went out and 195 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 00:00Z on 1986-11-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 1986-11-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 203 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
839 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
203 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Nov 20, 2:16 AM CST, 2 hours 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
216 AM CST THU NOV 20 1986

...STRONG THUNDERSTORMS WERE MOVING ACROSS PORTIONS OF EAST
CENTRAL LOUISIANA...

WEATHER RADAR SHOWED A LINE OF STRONG THUNDERSTORMS FROM WOODVILLE
MISSISSIPPI...SOUTHWEST ACROSS SIMMESPORT AND VILLE PLATTE TO NEAR
KINDER.  THE LINE OF THUNDERSTORMS WAS MOVING SOUTHEAST AT 20 MPH.

THESE THUNDERSTORMS WILL PRODUCE STRONG GUSTY WINDS...HEAVY RAIN...
WITH FLOODING OF STREETS AND OTHER LOW LYING AREAS...DANGEROUS
LIGHTNING AND POSSIBLY SOME SMALL HAIL AS THEY MOVE ACROSS AVOYELLES
...ST LANDRY...POINTE COUPEE AND WEST FELICIANA PARISHES DURING THE
NEXT ONE TO TWO HOURS.
Special weather statement, Nov 20, 3:59 AM CST, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1000 AM CST THU NOV 20 1986

...COLD FRONT MOVING THROUGH METROPOLITAN BATON ROUGE...

WEATHER RADARS SHOWED A LINE OF STRONG THUNDERSTORMS ABOUT 20 MILES
WIDE FROM BOGALUSA TO BATON ROUGE TO LAFAYETTE.  THE THUNDERSTORMS
WERE ASSOCIATED WITH A COLD FRONT JUST NORTH OF BATON ROUGE PUSHING
SOUTHEAST NEAR 20 MILES AN HOUR.  THE COLD FRONT SHOULD MOVE THROUGH
BATON ROUGE DURING THE HOUR.

THESE THUNDERSTORMS WILL PRODUCE STRONG GUSTY WINDS...HEAVY RAIN...
WITH FLOODING OF STREETS AND OTHER LOW LYING AREAS AND DANGEROUS
LIGHTNING AS THEY MOVE METROPOLITAN BATON ROUGE.
Special weather statement, Nov 20, 4:15 AM CST, 51 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
416 AM CST THU NOV 20 1986

...STRONG THUNDERSTORMS WERE MOVING ACROSS PORTIONS OF EAST
CENTRAL LOUISIANA...

WEATHER RADAR SHOWED A LINE OF STRONG THUNDERSTORMS FROM MCCOMB
MISSISSIPPI...SOUTHWEST ACROSS CLINTON AND PORT BARRE TO NEAR
RAYNE.  THE LINE OF THUNDERSTORMS WAS MOVING SOUTHEAST AT 20 MPH.

THESE THUNDERSTORMS WILL PRODUCE STRONG GUSTY WINDS...HEAVY RAIN...
WITH FLOODING OF STREETS AND OTHER LOW LYING AREAS...DANGEROUS
LIGHTNING AND POSSIBLY SOME SMALL HAIL AS THEY MOVE ACROSS ST LANDRY
...POINTE COUPEE...WEST FELICIANA...EAST FELICIANA...ST HELENA...
EAST BATON ROUGE AND WEST BATON ROUGE PARISHES DURING THE NEXT ONbE
TO TWO HOURS.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 20, 5:06 AM CSTTornado WarningLIXPointe Coupee, West Feliciana54 min

Nearby

Tornado Warnings in Louisiana, 1986Every tornado warning in 1986Tornadoes in 1986

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.