Alert archive / Louisiana / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 9, NWS New Orleans, LA

May 24, 1986Catahoula Parish, Concordia Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at May 24, 1986, 4:50 PM CDT for Catahoula Parish, Concordia Parish, Louisiana. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
May 24, 1986, 4:50 PM CDT (21:50 UTC)
Expired
May 24, 1986, 5:50 PM CDT
In force
60 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Catahoula Parish, LA, Concordia Parish, LA

The radar

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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.8 hours before the alert went out and 178 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 1986-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1972 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 1986-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -34 square meters per square second.1939Sfc1 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
1972 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
653 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-34 m²/s²
0-3 km storm-relative helicity
-21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBTR 242150
SVRBTR
LAC025-029-242250-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BATON ROUGE LA
450 PM CDT SUN MAY 24 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 550 PM CDT FOR THE FOLLOWING PARISHES IN

EAST CENTRAL LOUISIANA...CATAHOULA AND CONCORDIA.

AT 440 PM CDT RADAR INDICATED VERY STRONG THUNDERSTORMS OVER THE
SOUTHERN HALF OF CATAHOULA PARISH AND OVER WESTER#N CONCORDIA PARISH.
THE THUNDERSTORMS WERE MOVING NORTH AT 10 MPH AND WILL MOVE OVER
CATAHOULA AND CONCORDIA PARISHES DURING THE NEXT HOUR.

IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, May 24, 2:14 PM CDT, 2 hours 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
215 PM CDT SAT MAY 24 1986

...THUNDERSTORMS WITH VERY HEAVY RAIN WERE MOVING ACROSS PARTS OF EAST
CENTRAL LOUISIANA...

RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN SCATTERED ACROSS PARTS
OF EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METROPOLITAN AREA.
THE STRONGEST THUNDERSTORMS WERE NEAR DONALDSONVILLE AND ST. FRANCIS-
VILLE.  MOVEMENT WAS SLOWLY NORTH.

PEOPLE THROUGHOUT EAST CENTRAL LOUISIANA CAN EXPECT STRONG GUSTY WIND..
BRIEF VERY HEAVY RAIN AND POSSIBLY HAIL AS THEY PASS THROUGH THIS
AFTERNOON.
Special weather statement, May 24, 3:18 PM CDT, 1 hour 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
320 PM CDT SAT MAY 24 1986

...THUNDERSTORMS WITH VERY HEAVY RAIN WERE MOVING ACROSS PARTS OF EAST
CENTRAL LOUISIANA...

RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN SCATTERED ACROSS PARTS
OF EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METROPOLITAN AREA.
THE STRONGEST THUNDERSTORMS WERE SHOWN FROM DONALDSONVILLE TO GONZALES..
BATON ROUGE TO WOODVILLE MISSISSIPPI..AND FROM OPELOUSAS TO JONESVILLE.
PEA SIZE HAIL WAS REPORTED AT DONALDSONVILLE DURING THE PAST HOUR.

PEOPLE THROUGHOUT EAST CENTRAL LOUISIANA CAN EXPECT STRONG GUSTY WIND..
BRIEF VERY HEAVY RAIN AND POSSIBLY HAIL AS THEY PASS THROUGH THIS
AFTERNOON.

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 3:45 PM CDTSevere Thunderstorm WarningLIXAvoyelles, Catahoula, Concordia60 min
May 24, 5:50 PM CDTSevere Thunderstorm WarningLIXCatahoula60 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1986Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive.