Alert archive / Louisiana / Tornado Warnings in 2011
Tornado Warning 149, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Sep 4, 2011, 2:59 PM CDT for Tangipahoa Parish, Washington Parish, Louisiana; Amite County, Pike County, Mississippi. 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 outline as issued.
The facts
- Issued
- Sep 4, 2011, 2:59 PM CDT (19:59 UTC)
- Expired
- Sep 4, 2011, 3:45 PM CDT
- In force
- 46 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
Counties Tangipahoa Parish, LA, Washington Parish, LA, Amite County, MS, Pike County, MS
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 4, 5:05 AM CDT | Tornado Watch | SPC | 11 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.0 hours before the alert went out and 114 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
- 2528 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 473 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 249 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 18.9
The text
As transmitted, in the capitals the NWS used until 2016.
517
WFUS54 KLIX 041959
TORLIX
LAC105-117-MSC005-113-042045-
/O.NEW.KLIX.TO.W.0149.110904T1959Z-110904T2045Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
259 PM CDT SUN SEP 4 2011
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
* TORNADO WARNING FOR...
NORTHEASTERN TANGIPAHOA PARISH IN SOUTHEAST LOUISIANA...
WESTERN WASHINGTON PARISH IN SOUTHEAST LOUISIANA...
NORTHEASTERN AMITE COUNTY IN SOUTHERN MISSISSIPPI...
PIKE COUNTY IN SOUTHERN MISSISSIPPI...
THIS INCLUDES THE CITY OF MCCOMB...
* UNTIL 345 PM CDT
* AT 255 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES EAST OF
WILMER...OR 7 MILES WEST OF FRANKLINTON...MOVING NORTH AT 40 MPH.
A SECOND AREA OF ROTATION CAPABLE OF PRODUCING A TORNADO WAS
LOCATED NEAR OSKYA...MOVING NORTH AT 40 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT
HERMAN...OSYKA...MAGNOLIA AND SUMMIT
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT SUNDAY AFTERNOON
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.
&&
LAT...LON 3130 9025 3100 9026 3100 9019 3076 9014
3072 9035 3132 9067 3136 9046 3135 9026
TIME...MOT...LOC 1958Z 167DEG 34KT 3084 9027
$$1 follow-up statement
573
WWUS54 KLIX 042022
SVSLIX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
322 PM CDT SUN SEP 4 2011
LAC105-117-MSC005-113-042045-
/O.CON.KLIX.TO.W.0149.000000T0000Z-110904T2045Z/
AMITE MS-PIKE MS-WASHINGTON LA-TANGIPAHOA LA-
322 PM CDT SUN SEP 4 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR PIKE AND
NORTHEASTERN AMITE COUNTIES...AND NORTHEASTERN TANGIPAHOA AND WESTERN
WASHINGTON PARISHES...
AT 319 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
ANOTHER AREA OF ROTATION CAPABLE OF PRODUCING A TORNADO. THIS
TORNADO WAS LOCATED 11 MILES SOUTHEAST OF WILMER...OR 8 MILES
SOUTHWEST OF FRANKLINTON...MOVING NORTH AT 35 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT
HERMAN...MCCOMB AIRPORT...SUMMIT...OSYKA...MCCOMB AND MAGNOLIA
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.
THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.
IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT SUNDAY AFTERNOON
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.
&&
LAT...LON 3130 9025 3100 9026 3100 9019 3076 9014
3072 9035 3132 9067 3136 9046 3135 9026
TIME...MOT...LOC 2022Z 169DEG 31KT 3078 9021
$$The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 7:49 PM CDT | Special Marine Warning | LIX | 56 min | |
| Sep 3, 8:32 PM CDT | Tornado Warning | LIX | Plaquemines, Saint Bernard | 28 min |
| Sep 3, 8:37 PM CDT | Special Marine Warning | LIX | 53 min | |
| Sep 3, 9:28 PM CDT | Special Marine Warning | LIX | 32 min | |
| Sep 3, 9:37 PM CDT | Special Marine Warning | LIX | 23 min | |
| Sep 3, 9:56 PM CDT | Tornado Warning | LIX | Saint Tammany | 34 min |
| Sep 3, 11:21 PM CDT | River Flood Warning | LIX | Ascension, Livingston | 4 days |
| Sep 4, 2:54 AM CDT | Special Marine Warning | LIX | 36 min | |
| Sep 4, 4:20 AM CDT | Special Marine Warning | LIX | 25 min | |
| Sep 4, 4:42 AM CDT | Special Marine Warning | LIX | 33 min | |
| Sep 4, 6:23 AM CDT | Areal Flood Advisory | LIX | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more | 112 min |
| Sep 4, 8:05 AM CDT | Flash Flood Warning | LIX | Assumption, Lafourche, Terrebonne | 4 hr |
| Sep 4, 11:00 AM CDT | River Flood Warning | LIX | Saint Tammany, Washington | 16 days |
| Sep 4, 11:00 AM CDT | River Flood Warning | LIX | Saint Tammany | 18 days |
| Sep 4, 11:15 AM CDT | Flash Flood Warning | LIX | Plaquemines | 3 hr |
| Sep 4, 11:34 AM CDT | Special Marine Warning | LIX | 26 min | |
| Sep 4, 12:10 PM CDT | Special Marine Warning | LIX | 35 min | |
| Sep 4, 1:22 PM CDT | Special Marine Warning | LIX | 23 min | |
| Sep 4, 2:32 PM CDT | Tornado Warning | LIX | Tangipahoa, Washington | 28 min |
| Sep 4, 3:43 PM CDT | Tornado Warning | LIX | Tangipahoa, Washington | 47 min |
| Sep 4, 5:27 PM CDT | Flash Flood Warning | LIX | Pointe Coupee, West Feliciana | 3 hr |
| Sep 4, 6:20 PM CDT | Tornado Warning | LIX | Saint Tammany, Washington | 40 min |
| Sep 3, 7:02 PM CDT | Tornado Warning | LIX | Harrison | 13 min |
| Sep 3, 8:58 PM CDT | Tornado Warning | LIX | Harrison | 47 min |
| Sep 3, 9:37 PM CDT | Tornado Warning | LIX | Hancock, Harrison | 38 min |
| Sep 3, 10:16 PM CDT | Tornado Warning | LIX | Hancock, Pearl River | 29 min |
| Sep 3, 11:22 PM CDT | Tornado Warning | LIX | Hancock, Harrison | 23 min |
| Sep 3, 11:41 PM CDT | Tornado Warning | LIX | Hancock, Harrison, Pearl River | 34 min |
| Sep 4, 12:40 AM CDT | Tornado Warning | LIX | Harrison | 20 min |
| Sep 4, 12:41 AM CDT | Tornado Warning | LIX | Harrison | 34 min |
| Sep 4, 1:00 AM CDT | Tornado Warning | LIX | Harrison | 15 min |
| Sep 4, 1:14 AM CDT | Tornado Warning | LIX | Jackson | 31 min |
| Sep 4, 3:23 AM CDT | Tornado Warning | LIX | Walthall | 14 min |
| Sep 4, 4:45 AM CDT | Tornado Warning | LIX | Hancock, Harrison | 45 min |
| Sep 4, 5:09 AM CDT | Tornado Warning | LIX | Hancock, Pearl River | 51 min |
| Sep 4, 5:27 AM CDT | Tornado Warning | LIX | Hancock, Pearl River | 33 min |
| Sep 4, 8:38 AM CDT | Flash Flood Warning | LIX | Pearl River | 3 hr |
| Sep 4, 10:30 AM CDT | Flash Flood Warning | LIX | Harrison, Jackson | 3 hr |
| Sep 4, 10:51 AM CDT | Tornado Warning | LIX | Harrison | 24 min |
| Sep 4, 1:21 PM CDT | Tornado Warning | LIX | Harrison, Jackson | 39 min |
| Sep 4, 1:27 PM CDT | Flash Flood Warning | LIX | Harrison, Jackson | 3 hr |
| Sep 4, 1:56 PM CDT | Tornado Warning | LIX | Jackson | 34 min |
Nearby
Tornado Warnings in Louisiana, 2011Tornado Warnings in Mississippi, 2011Every tornado warning in 2011Tornadoes in 2011
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.