Alert archive / Louisiana / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 74, NWS New Orleans, LA

June 17, 1994Saint Tammany Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 17, 1994, 3:50 PM CDT for Saint Tammany Parish, Washington Parish, Louisiana. It was in force for 115 min.

The area

The counties it named.

The facts

Issued
Jun 17, 1994, 3:50 PM CDT (20:50 UTC)
Expired
Jun 17, 1994, 5:45 PM CDT
In force
115 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Saint Tammany Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.8 hours before the alert went out and 51 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 12:00Z on 1994-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2055 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 12:00Z on 1994-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
2055 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
830 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
40 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 KNEW 172051
SVRNEW
LAC103-117-172245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
350 PM CDT FRI JUN 17 1994
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM CDT
FOR RESIDENTS IN THE FOLLOWING PARISHESS...
 
IN SOUTHEAST LOUISIANA
 
   ...ST.TAMMANY PARISH...EASTERN WASHINGTON PARISH
 
AT 350 PM CDT NATIONAL WEATHER SERVICE RADAR IN SLIDELL SHOWED A SEVERE
THUNDERSTORM OVER WASHINGTON PARISH NEAR BOGALUSA. THE STORM IS MOVING
TOWARDS THE SOUTHWEST AT NEAR 20 MPH. TREES HAVE BEEN REPORTED DOWN AND
NUMEROUS TREE LIMBS BLOWN OFF NEAR BOGALUSA.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE W&ATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 2:34 PM CDTSevere Thunderstorm WarningLIXJefferson, Orleans56 min
Jun 17, 5:33 PM CDTSevere Thunderstorm WarningLIXAssumption, Lafourche, Terrebonne57 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1994Every severe thunderstorm warning in 1994

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.