Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 81, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 11, 1997, 10:14 AM CDT for Lafourche Parish, Saint James Parish, Saint John the Baptist Parish, Louisiana. It was in force for 46 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, 10:14 AM CDT (15:14 UTC)
- Expired
- Apr 11, 1997, 11:00 AM CDT
- In force
- 46 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Lafourche Parish, LA, Saint James Parish, LA, Saint John the Baptist 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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.2 hours before the alert went out and 256 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 10:27 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 |
| Apr 11, 1:16 PM CDT | Severe Thunderstorm Warning | LIX | Walthall | 44 min |
| Apr 11, 2:48 PM CDT | Severe Thunderstorm Warning | LIX | Jackson | 42 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.