Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 113, NWS New Orleans, LA

April 26, 1997Livingston Parish, Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 26, 1997, 3:00 AM CDT for Livingston Parish, Tangipahoa Parish, Louisiana. It was in force for 45 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: Apr 26, 1997, 3:00 AM CDT (08:00 UTC)
Expired: Apr 26, 1997, 3:45 AM CDT
In force: 45 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Livingston Parish, LA, Tangipahoa Parish, LA

What was reported inside it

Time	Report	Where	Remark
Apr 26, 3:15 AM CDT	Thunderstorm Wind	Walker, LA
Apr 26, 3:22 AM CDT	Thunderstorm Wind	Livingston, 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 26, 12:15 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 8.0 hours before the alert went out and 89 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1139 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 496 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 260802
SVRNEW
LAC063-105-LAZ501-260845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
300 AM CDT SAT APR 26 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  345 AM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...SOUTHERN LIVINGSTON PARISH...SOUTHERN TANGIPAHOA PARISH
 
  AND FOR MARINE INTERESTS IN THE COASTAL WATERS AROUND...
 
  ...LAKE MAUREPAS
 
AT 300 AM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED OVER EAST
LIVINGSTON PARISH FROM JUST NORTH OF HOLDEN TO JUST WEST OF LAKE
MAUREPAS...MOVING EAST-NORTHEAST AT 40 MILES AN HOUR. THESE STORMS
BLEW DOWN A TREE IN DONALDSONVILLE ON LOUISIANA HIGHWAY 1 AROUND 240
AM.
 
STRONG WINDS UP TO 60 MILES AN HOUR ARE LIKELY WITH THIS LINE OF
STORMS AS THEY MOVE THROUGH THE COMMUNITIES OF ALBANY...MAUREPAS...
HAMMOND AND PONCHATOULA THROUGH 345 AM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
THESE THUNDERSTORMS WILL PRODUCE WINDS EXCEEDING GALE FORCE...
ROUGH SEAS... HEAVY RAINFALL... DANGEROUS LIGHTNING AND THE
POSSIBILITY OF WATERSPOUTS. SMALL CRAFT SHOULD SEEK SAFE HARBOR
IMMEDIATE LY.
 
 
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 1:27 AM CDT	Severe Thunderstorm Warning	LIX	Iberville, West Baton Rouge	33 min
Apr 26, 2:04 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge, Livingston	41 min
Apr 26, 3:40 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	50 min
Apr 26, 3:56 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Saint Charles	49 min
Apr 26, 3:56 AM CDT	Severe Thunderstorm Warning	LIX	Orleans, Plaquemines, Saint Bernard	49 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997 Every severe thunderstorm warning in 1997

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.