Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 79, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 11, 1997, 9:29 AM CDT for Assumption Parish, Lafourche Parish, Saint James Parish, Louisiana. It was in force for 46 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 11, 1997, 9:29 AM CDT (14:29 UTC)
- Expired
- Apr 11, 1997, 10:15 AM CDT
- In force
- 46 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Assumption Parish, LA, Lafourche Parish, LA, Saint James Parish, LA
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.5 hours before the alert went out and 238 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 111430 RRA SVRNEW LAC007-057-093-111515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 929 AM CDT FRI APR 11 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 AM CDT FOR RESIDENTS IN THE FOLLOWING LOCATIONS... IN SOUTHEAST LOUISIANA ...ASSUMPTION PARISH...NORTHERN LAFOURCHE PARISH ...ST. JAMES PARISH AND THE ADJACENT COASTAL WATERS AT 928 AM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORMS JUST SOUTHWEST OF LABADIEVILLE. THE THUNDERSTORM WAS MOVING NORTHEAST AT 35 MILES AN HOUR. COMMUNITIES IN THE PATH OF THIS THUNDERSTORM INCLUDE THIBODAUX...NAPOLEANVILLE...AND CONVENT. 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 BUS|INESS. HEAVY RAINS FLOOD ROADS QUICKLY 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, 9:36 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, 10:27 AM CDT | Severe Thunderstorm Warning | LIX | Lafourche | 48 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; the sounding from the Mesonet's radiosonde archive.