Alert archive / Louisiana / Tornado Warnings in 1999
Tornado Warning 20, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Mar 3, 1999, 12:25 AM CST for Saint Bernard Parish, Louisiana. It was in force for 25 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
- Mar 3, 1999, 12:25 AM CST (06:25 UTC)
- Expired
- Mar 3, 1999, 12:50 AM CST
- In force
- 25 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Saint Bernard Parish, LA
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 2, 11:15 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 6.4 hours before the alert went out and 43 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
- 698 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 984 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS1 KNEW 030631 RRA TORNEW LAC087-030650- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1225 AM CST WED MAR 3 1999 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A... * TORNADO WARNING FOR - ST BERNARD PARISH IN SOUTHEASTERN LOUISIANA * UNTIL 1250 AM CST * AT 1225 AM CST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO ABOUT 5 MILES SOUTHEAST OF YSCLOSKEY. THIS STORM WAS MOVING TO THE EAST AT 40 MPH. * THE STORM WILL AFFECT AREAS NEAR SHELL BEACH. IF YOU ARE IN THESE AREAS...SEEK SHELTER IN A SMALL INTERIOR ROOM AWAY FROM WINDOWS IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 8:25 PM CST | Severe Thunderstorm Warning | LIX | West Feliciana | 60 min |
| Mar 2, 8:25 PM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee | 60 min |
| Mar 2, 9:23 PM CST | Severe Thunderstorm Warning | LIX | East Feliciana, Saint Helena | 47 min |
| Mar 2, 9:38 PM CST | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 47 min |
| Mar 2, 9:47 PM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge | 28 min |
| Mar 2, 9:54 PM CST | Severe Thunderstorm Warning | LIX | Livingston | 46 min |
| Mar 2, 10:07 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Assumption | 48 min |
| Mar 2, 10:34 PM CST | Severe Thunderstorm Warning | LIX | Lafourche, Saint James, Saint John the Baptist | 46 min |
| Mar 2, 10:34 PM CST | Severe Thunderstorm Warning | LIX | Terrebonne | 46 min |
| Mar 2, 10:40 PM CST | Severe Thunderstorm Warning | LIX | Livingston | 35 min |
| Mar 2, 11:05 PM CST | Severe Thunderstorm Warning | LIX | Lafourche, Saint Charles | 45 min |
| Mar 2, 11:26 PM CST | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines | 49 min |
| Mar 2, 11:37 PM CST | Severe Thunderstorm Warning | LIX | Saint Bernard | 53 min |
| Mar 2, 11:51 PM CST | Tornado Warning | LIX | Plaquemines, Saint Bernard | 29 min |
| Mar 3, 12:08 AM CST | Severe Thunderstorm Warning | LIX | Terrebonne | 37 min |
| Mar 3, 12:23 AM CST | Severe Thunderstorm Warning | LIX | Plaquemines | 32 min |
Nearby
Tornado Warnings in Louisiana, 1999Every tornado warning in 1999Tornadoes in 1999
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.