Alert archive / Louisiana / Tornado Warnings in 2012
Tornado Warning 18, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Mar 21, 2012, 8:49 AM CDT for 4 parishes in Louisiana. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 21, 2012, 8:49 AM CDT (13:49 UTC)
- Expired
- Mar 21, 2012, 9:27 AM CDT
- In force
- 38 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
Counties Ascension Parish, LA, Assumption Parish, LA, Iberville Parish, LA, Saint James 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 21, 5:04 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 1.8 hours before the alert went out and 142 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
- 983 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 519 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 363 m²/s²
- 0-3 km storm-relative helicity
- 421 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 10.7
The text
As transmitted, in the capitals the NWS used until 2016.
684
WFUS54 KLIX 211349
TORLIX
LAC005-007-047-093-211445-
/O.NEW.KLIX.TO.W.0018.120321T1349Z-120321T1445Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
849 AM CDT WED MAR 21 2012
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHWESTERN ASCENSION PARISH IN SOUTHEAST LOUISIANA...
THIS INCLUDES THE CITY OF DONALDSONVILLE...
NORTHERN ASSUMPTION PARISH IN SOUTHEAST LOUISIANA...
THIS INCLUDES THE CITY OF NAPOLEONVILLE...
SOUTHEASTERN IBERVILLE PARISH IN SOUTHEAST LOUISIANA...
WESTERN ST. JAMES PARISH IN SOUTHEAST LOUISIANA...
* UNTIL 945 AM CDT
* AT 847 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR PIERRE
PART...OR 7 MILES WEST OF NAPOLEONVILLE...MOVING NORTHEAST AT 15
MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CDT WEDNESDAY FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.
&&
LAT...LON 3001 9125 3001 9124 3003 9123 3027 9099
3008 9079 2985 9114 2997 9126 2999 9127
TIME...MOT...LOC 1349Z 227DEG 11KT 2998 9113
$$3 follow-up statements
994
WWUS54 KLIX 211405
SVSLIX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
905 AM CDT WED MAR 21 2012
LAC093-211415-
/O.CAN.KLIX.TO.W.0018.000000T0000Z-120321T1445Z/
ST. JAMES LA-
905 AM CDT WED MAR 21 2012
...THE TORNADO WARNING FOR WESTERN ST. JAMES PARISH IS CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CDT WEDNESDAY FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.
LAT...LON 3007 9120 3027 9099 3016 9088 2996 9103
3005 9121
TIME...MOT...LOC 1405Z 208DEG 25KT 3009 9107
$$
LAC005-007-047-211445-
/O.CON.KLIX.TO.W.0018.000000T0000Z-120321T1445Z/
ASCENSION LA-ASSUMPTION LA-IBERVILLE LA-
905 AM CDT WED MAR 21 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR
SOUTHEASTERN IBERVILLE...NORTH CENTRAL ASSUMPTION AND SOUTHWESTERN
ASCENSION PARISHES...
AT 904 AM CDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION. THIS TORNADO WAS LOCATED
NEAR DONALDSONVILLE...MOVING NORTHEAST AT 30 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GEISMER
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.
THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
&&
LAT...LON 3007 9120 3027 9099 3016 9088 2996 9103
3005 9121
TIME...MOT...LOC 1405Z 208DEG 25KT 3009 9107
$$
24/RR693
WWUS54 KLIX 211416
SVSLIX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
916 AM CDT WED MAR 21 2012
LAC007-047-211426-
/O.CAN.KLIX.TO.W.0018.000000T0000Z-120321T1445Z/
ASSUMPTION LA-IBERVILLE LA-
916 AM CDT WED MAR 21 2012
...THE TORNADO WARNING FOR SOUTHEASTERN IBERVILLE AND NORTH CENTRAL
ASSUMPTION PARISHES IS CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CDT WEDNESDAY FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.
LAT...LON 3017 9107 3019 9107 3027 9099 3022 9094
3020 9092 3009 9097 3012 9109 3016 9109
TIME...MOT...LOC 1416Z 199DEG 31KT 3020 9104
$$
LAC005-211445-
/O.CON.KLIX.TO.W.0018.000000T0000Z-120321T1445Z/
ASCENSION LA-
916 AM CDT WED MAR 21 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR
SOUTHWESTERN ASCENSION PARISH...
AT 912 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A TORNADO. THIS TORNADO WAS LOCATED NEAR GEISMER...OR 6 MILES
NORTHWEST OF DONALDSONVILLE...MOVING NORTH AT 35 MPH.
THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
INDICATED PARISH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CDT WEDNESDAY FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.
&&
LAT...LON 3017 9107 3019 9107 3027 9099 3022 9094
3020 9092 3009 9097 3012 9109 3016 9109
TIME...MOT...LOC 1416Z 199DEG 31KT 3020 9104
$$
24/RR715
WWUS54 KLIX 211427
SVSLIX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
927 AM CDT WED MAR 21 2012
LAC005-211437-
/O.CAN.KLIX.TO.W.0018.000000T0000Z-120321T1445Z/
ASCENSION LA-
927 AM CDT WED MAR 21 2012
...THE TORNADO WARNING FOR SOUTHWESTERN ASCENSION PARISH IS
CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON CDT WEDNESDAY FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.
LAT...LON 3017 9107 3019 9107 3027 9099 3022 9094
3020 9092 3009 9097 3012 9109 3016 9109
TIME...MOT...LOC 1427Z 199DEG 31KT 3029 9100
$$
24/RRThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 21, 7:34 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, Iberville, Livingston, Pointe Coupee, West Baton Rouge, West Feliciana | 56 min |
| Mar 21, 8:30 AM CDT | Severe Thunderstorm Warning | LIX | Ascension, Assumption, East Baton Rouge, Iberville | 60 min |
| Mar 21, 8:32 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana | 58 min |
| Mar 21, 8:45 AM CDT | Areal Flood Advisory | LIX | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Lafourche and 7 more | 2 hr |
| Mar 21, 9:10 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Saint Helena, West Feliciana | 65 min |
| Mar 21, 9:18 AM CDT | Severe Thunderstorm Warning | LIX | Ascension, Assumption, Lafourche, Saint James, Terrebonne | 57 min |
| Mar 21, 9:19 AM CDT | Tornado Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston | 26 min |
| Mar 21, 9:29 AM CDT | River Flood Warning | LIX | Saint Tammany, Washington | 19 days |
| Mar 21, 9:36 AM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston, Saint Helena, Tangipahoa | 54 min |
| Mar 21, 9:49 AM CDT | Tornado Warning | LIX | East Baton Rouge, East Feliciana, Livingston, Saint Helena | 56 min |
| Mar 21, 10:05 AM CDT | River Flood Warning | LIX | Tangipahoa | 4 days |
| Mar 21, 10:07 AM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Saint Charles, Saint John the Baptist, Saint Tammany, Tangipahoa and 1 more | 53 min |
| Mar 21, 10:11 AM CDT | Special Marine Warning | LIX | 2 hr | |
| Mar 21, 10:16 AM CDT | Tornado Warning | LIX | Livingston, Saint John the Baptist, Tangipahoa | 44 min |
| Mar 21, 10:24 AM CDT | River Flood Warning | LIX | Saint Tammany | 49 hr |
| Mar 21, 10:24 AM CDT | Severe Thunderstorm Warning | LIX | Livingston, Saint Helena, Tangipahoa, Washington | 51 min |
| Mar 21, 10:33 AM CDT | Special Marine Warning | LIX | 117 min | |
| Mar 21, 11:01 AM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 59 min |
| Mar 21, 11:05 AM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Saint Charles, Saint John the Baptist, Tangipahoa, Terrebonne | 55 min |
| Mar 21, 11:11 AM CDT | Small Craft Advisory | LIX | 5 hr | |
| Mar 21, 11:12 AM CDT | Areal Flood Advisory | LIX | Jefferson, Lafourche, Saint Charles, Saint John the Baptist, Saint Tammany, Tangipahoa and 2 more | 2 hr |
| Mar 21, 11:18 AM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 57 min |
| Mar 21, 11:52 AM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles | 53 min |
| Mar 21, 12:03 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 57 min |
| Mar 21, 12:04 PM CDT | Special Marine Warning | LIX | 116 min | |
| Mar 21, 12:12 PM CDT | Tornado Warning | LIX | Saint Tammany | 36 min |
| Mar 21, 12:38 PM CDT | Tornado Warning | LIX | Jefferson, Orleans, Saint Bernard | 25 min |
| Mar 21, 12:55 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 65 min |
| Mar 21, 1:16 PM CDT | Special Marine Warning | LIX | 119 min | |
| Mar 21, 1:46 PM CDT | Tornado Warning | LIX | Saint Tammany | 29 min |
| Mar 21, 1:57 PM CDT | Special Marine Warning | LIX | 33 min | |
| Mar 21, 2:05 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 55 min |
| Mar 21, 3:13 PM CDT | Special Marine Warning | LIX | 2 hr | |
| Mar 21, 4:57 PM CDT | Areal Flood Advisory | LIX | Orleans, Plaquemines, Saint Bernard, Saint Tammany | 2 hr |
| Mar 21, 5:25 PM CDT | Flash Flood Warning | LIX | Orleans, Saint Bernard, Saint Tammany | 2 hr |
| Mar 21, 5:44 PM CDT | Special Marine Warning | LIX | 2 hr |
Nearby
Tornado Warnings in Louisiana, 2012Every tornado warning in 2012Tornadoes in 2012
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.