Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 82, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 11, 1997, 10:27 AM CDT for Lafourche Parish, Louisiana. It was in force for 48 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 11, 1997, 10:27 AM CDT (15:27 UTC)
- Expired
- Apr 11, 1997, 11:15 AM CDT
- In force
- 48 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Lafourche Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 11, 10:55 AM CDT | Thunderstorm Wind | Larose, LA | |
| Apr 11, 11:00 AM CDT | Tornado F0 | Galliano, 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 11, 10:15 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.5 hours before the alert went out and 279 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.
- Mixed-layer CAPE
- 723 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 601 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 111528 RRA SVRNEW LAC057-111615- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1027 AM CDT FRI APR 11 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 AM CDT FOR RESIDENTS IN THE FOLLOWING LOCATION... IN SOUTHEAST LOUISIANA ...SOUTHERN LAFOURCHE PARISH AND THE ADJACENT COASTAL WATERS AT 1025 AM NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM NEAR HOUMA SOUTH AND TO THE COAST. THE THUNDERSTORMS WERE MOVING EAST AROUND 40 MILES AN HOUR. COMMUNITIES IN THE PATH OF THESE THUNDERSTORMS INCLUDES LAROSE...GOLDEN MEADOW AND PORT FOURCHON. 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 QDUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 9:29 AM CDT | Severe Thunderstorm Warning | LIX | Assumption, Lafourche, Saint James | 46 min |
| Apr 11, 9:36 AM CDT | Severe Thunderstorm Warning | LIX | Terrebonne | 69 min |
| Apr 11, 10:14 AM CDT | Severe Thunderstorm Warning | LIX | Lafourche, Saint James, Saint John the Baptist | 46 min |
| Apr 11, 10:45 AM CDT | Severe Thunderstorm Warning | LIX | Saint Charles | 45 min |
| Apr 11, 11:00 AM CDT | Flash Flood Warning | LIX | Assumption | 4 hr |
| Apr 11, 11:09 AM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines | 66 min |
| Apr 11, 11:09 AM CDT | Severe Thunderstorm Warning | LIX | Saint Bernard | 66 min |
| Apr 11, 11:26 AM CDT | Tornado Warning | LIX | Jefferson, Lafourche | 34 min |
| Apr 11, 11:31 AM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 44 min |
| Apr 11, 11:49 AM CDT | Tornado Warning | LIX | Saint Tammany, Tangipahoa | 26 min |
| Apr 11, 12:12 PM CDT | Tornado Warning | LIX | Saint Tammany, Tangipahoa | 33 min |
| Apr 11, 12:17 PM CDT | Severe Thunderstorm Warning | LIX | Orleans, Plaquemines, Saint Bernard | 43 min |
| Apr 11, 12:32 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 43 min |
| Apr 11, 12:59 PM CDT | Severe Thunderstorm Warning | LIX | Plaquemines, Saint Bernard | 46 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1997Every 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.