Alert archive / Louisiana / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 121, NWS New Orleans, LA

April 15, 1996Plaquemines Parish, Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 15, 1996, 2:26 AM CDT for Plaquemines Parish, Saint Bernard Parish, Louisiana. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 15, 1996, 2:26 AM CDT (07:26 UTC)
Expired: Apr 15, 1996, 3:15 AM CDT
In force: 49 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Plaquemines Parish, LA, Saint Bernard Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.4 hours before the alert went out and 61 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: 2003 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 554 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 14.6

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 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, Apr 15, 1:00 AM CDT, 1 hour 26 minutes before

LAZ050-038-150630-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1259 AM CDT MON APR 15 1996

...THE SEVERE THUNDERSTORM WARNING FOR TANGIPAHOA PARISH HAS BEEN
CANCELLED...

AT 1255 AM CDT...THE THUNDERSTORM THAT PROMPTED THE SEVERE THUNDERSTORM
WARNING FOR SOUTHERN TANGIPAHOA PARISH HAS WEAKENED AND MOVED OUT OF THE
AREA. THE SHERIFFS OFFICE REPORTED HAIL OF UNSPECIFIED SIZE EAST OF
PONCHATOULA AROUND 1230 AM. A TORNADO WA2TCH REMAINS IN EFFECT UNTIL 200
AM AND ADDITIONAL STRONG TO SEVERE THUNDERSTORMS MAY MOVE INTO THE
NORTH SHORE AREA OF LAKES MAUREPAS AND PONTCHARTRAIN THROUGH 200 AM.

&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 7:17 PM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa	58 min
Apr 14, 7:43 PM CDT	Tornado Warning	LIX	Tangipahoa	32 min
Apr 14, 7:56 PM CDT	Tornado Warning	LIX	Saint Tammany	34 min
Apr 14, 8:32 PM CDT	Tornado Warning	LIX	Saint Tammany	28 min
Apr 14, 9:01 PM CDT	Tornado Warning	LIX	Saint Tammany	44 min
Apr 14, 11:17 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	58 min
Apr 15, 12:28 AM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa	47 min
Apr 15, 12:51 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Livingston	69 min
Apr 15, 1:37 AM CDT	Tornado Warning	LIX	Saint Tammany	23 min
Apr 15, 2:34 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans	41 min
Apr 15, 2:34 AM CDT	Severe Thunderstorm Warning	LIX	Saint Charles	41 min
Apr 14, 8:56 PM CDT	Severe Thunderstorm Warning	LIX	Pike	34 min
Apr 14, 10:08 PM CDT	Severe Thunderstorm Warning	LIX	Wilkinson	52 min
Apr 14, 10:36 PM CDT	Severe Thunderstorm Warning	LIX	Amite	69 min
Apr 15, 2:16 AM CDT	Severe Thunderstorm Warning	LIX	Hancock, Pearl River	29 min
Apr 15, 2:49 AM CDT	Flash Flood Warning	LIX	Hancock, Harrison, Pearl River	4 hr
Apr 15, 2:49 AM CDT	Flash Flood Warning	LIX	Jackson	4 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 1996 Every severe thunderstorm warning in 1996

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.