Alert archive / Louisiana / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 39, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 8, 1993, 1:48 PM CDT for Jefferson Parish, Lafourche Parish, Louisiana. It was in force for 57 min. 1 report 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 8, 1993, 1:48 PM CDT (18:48 UTC)
- Expired
- Apr 8, 1993, 2:45 PM CDT
- In force
- 57 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Jefferson Parish, LA, Lafourche Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 8, 2:20 PM CDT | Tornado F2 | Grand Isle, LA | An unusually strong, well organized cluster of thunderstorms moving east-northeast about 40 mph blew down about 14 utility poles 8 miles south of Leeville. A waterspout made landfall as a tornado near the middle of Grand Isle on the Gulf of Mexico side about |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.8 hours before the alert went out and 91 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
- 12 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 644 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 7, 8:48 PM CDT | Severe Thunderstorm Warning | LIX | Iberia, Saint Martin, St. Mary | 57 min |
| Apr 8, 2:57 AM CDT | Severe Thunderstorm Warning | LIX | Assumption, Saint Martin, St. Mary | 63 min |
| Apr 8, 3:42 AM CDT | Severe Thunderstorm Warning | LIX | Lafourche, Terrebonne | 63 min |
| Apr 8, 4:41 AM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Saint Charles | 64 min |
| Apr 8, 12:50 PM CDT | Severe Thunderstorm Warning | LIX | Lafourche, Terrebonne | 55 min |
| Apr 8, 2:50 PM CDT | Severe Thunderstorm Warning | LIX | Plaquemines | 55 min |
| Apr 8, 3:44 PM CDT | Severe Thunderstorm Warning | LIX | Saint Bernard | 46 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1993Every severe thunderstorm warning in 1993
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.