Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 109, NWS New Orleans, LA

September 3, 20115 parishes in Louisiana

NWS New Orleans, LA issued this tornado warning at Sep 3, 2011, 8:13 AM CDT for 5 parishes in Louisiana. It was in force for 62 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 3, 2011, 8:13 AM CDT (13:13 UTC)
Expired: Sep 3, 2011, 9:15 AM CDT
In force: 62 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Livingston Parish, LA, Saint Helena Parish, LA, Tangipahoa Parish, LA

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 3, 1:43 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.2 hours before the alert went out and 106 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 850 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 477 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 286 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

805 
WFUS54 KLIX 031313
TORLIX
LAC033-037-063-091-105-031415-
/O.NEW.KLIX.TO.W.0109.110903T1313Z-110903T1415Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
813 AM CDT SAT SEP 3 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  EAST BATON ROUGE PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITIES OF...ZACHARY...BATON ROUGE...BAKER...
  SOUTHERN EAST FELICIANA PARISH IN SOUTHEAST LOUISIANA...
  LIVINGSTON PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF DENHAM SPRINGS...
  SOUTHERN ST. HELENA PARISH IN SOUTHEAST LOUISIANA...
  SOUTHERN TANGIPAHOA PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITIES OF...HAMMOND...AMITE...

* UNTIL 915 AM CDT

* AT 809 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  SPRINGFIELD...OR 6 MILES WEST OF HAMMOND...MOVING NORTHWEST AT 60
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LIVINGSTON...MONTPELIER...WALKER...WATSON...WESTMINSTER...GREENWELL
  SPRINGS...PRIDE AND SLAUGHTER

THERE ARE OTHER AREAS OF CIRCULATIONS MAINLY MOVING THROUGH 
LIVINGSTON PARISH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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 1000 AM CDT SATURDAY MORNING
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3082 9123 3081 9058 3052 9025 3037 9025
      3030 9031 3028 9042 3031 9043 3034 9049
      3028 9056 3042 9120 3052 9120 3052 9124
      3069 9130
TIME...MOT...LOC 1312Z 123DEG 52KT 3051 9059

$$

CAB

2 follow-up statements

831 
WWUS54 KLIX 031355
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
855 AM CDT SAT SEP 3 2011

LAC033-037-063-091-105-031415-
/O.CON.KLIX.TO.W.0109.000000T0000Z-110903T1415Z/
ST. HELENA LA-EAST FELICIANA LA-EAST BATON ROUGE LA-LIVINGSTON LA-
TANGIPAHOA LA-
855 AM CDT SAT SEP 3 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 AM CDT FOR SOUTHERN
TANGIPAHOA...LIVINGSTON...EAST BATON ROUGE...SOUTHERN EAST FELICIANA
AND SOUTHERN ST. HELENA PARISHES...

AT 851 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT A TORNADO.  THIS TORNADO WAS LOCATED 20 MILES SOUTHEAST OF 
PONCHATOULA...OR 12 MILES SOUTHWEST OF MANDEVILLE...MOVING NORTHWEST 
AT 60 MPH.

THIS TORNADO TECHNICALLY IS A WATERSPOUT AND OVER LAKE PONTCHARTRAIN 
AND HAS A VERY STRONG ROTATION.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ROBERT...HAMMOND...BATON ROUGE AIRPORT...ZACHARY...WESTMINSTER...
WATSON...WALKER...TICKFAW...SPRINGFIELD...SLAUGHTER...PRIDE...
MONTPELIER...LIVINGSTON...KILLIAN...INDEPENDENCE...GREENWELL
SPRINGS...DENHAM SPRINGS...BATON ROUGE...BAKER AND AMITE

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 1000 AM CDT SATURDAY MORNING
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3082 9123 3081 9058 3053 9025 3038 9025
      3031 9031 3029 9042 3032 9043 3035 9049
      3029 9056 3043 9120 3053 9120 3053 9124
      3069 9130
TIME...MOT...LOC 1354Z 115DEG 51KT 3025 9024

$$

CAB

538 
WWUS54 KLIX 031403
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
903 AM CDT SAT SEP 3 2011

LAC033-037-063-091-105-031415-
/O.CON.KLIX.TO.W.0109.000000T0000Z-110903T1415Z/
ST. HELENA LA-EAST FELICIANA LA-EAST BATON ROUGE LA-LIVINGSTON LA-
TANGIPAHOA LA-
903 AM CDT SAT SEP 3 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 AM CDT FOR SOUTHERN
TANGIPAHOA...LIVINGSTON...EAST BATON ROUGE...SOUTHERN EAST FELICIANA
AND SOUTHERN ST. HELENA PARISHES...

AT 900 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT A TORNADO.  THIS TORNADO WAS LOCATED NEAR NEAR 
HAMMOND...MOVING NORTHWEST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
KILLIAN...SPRINGFIELD...TICKFAW...BATON ROUGE AIRPORT...ZACHARY...
WATSON...WALKER...SLAUGHTER...PRIDE...MONTPELIER...LIVINGSTON...
INDEPENDENCE...GREENWELL SPRINGS...DENHAM SPRINGS...BATON ROUGE...
BAKER AND AMITE

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 1000 AM CDT SATURDAY MORNING
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3082 9123 3081 9058 3053 9025 3038 9025
      3031 9031 3029 9042 3032 9043 3035 9049
      3029 9056 3043 9120 3053 9120 3053 9124
      3069 9130
TIME...MOT...LOC 1403Z 118DEG 30KT 3054 9041

$$

CAB

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this tornado warning went out at Sep 3, 3:49 AM CDT, 4 hours 24 minutes earlier.

Area forecast discussion, Sep 3, 3:49 AM CDT, 4 hours 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
349 AM CDT SAT SEP 3 2011

.SHORT TERM...
WILL KEEP IT SHORT THIS MORNING. A LARGE SHIELD OF RAIN AND SOME
TS ACTIVITY MIXED IN. RADAR RAINFALL ESTIMATES ARE RUNNING AROUND
2 INCHES AS AN AVERAGE OVER THE LAST 24 HOURS. GREATER AMOUNTS OF
4 TO 6 INCHES ARE SHOWING UP IN ST.
TAMMANY...TERREBONNE...LAFOURCHE...JEFFERSON...AND PLAQUEMINES.
ISOLATED AREAS OF 6 TO 8 INCHES ARE FOUND IN TERREBONNE PARISH.
EXPECTE THESE TALLIES TO BE A LOT HIGHER AFTER TODAY AND TONIGHT.
FLOODING IS ALMOST A CERTAINTY WHEN SOME OF THE HEAVIER CELLS
TRAIN OVER AN AREA. THE OTHER PROBLEM WILL CONTINUE TO BE
TORNADOES AND WATERSPOUTS. THE ENVIRONMENT IS PRIME FOR THESE
FEATURES AND THIS WILL NEED TO BE WATCHED CLOSELY TODAY THROUGH
SUNDAY. AS THE SYSTEM PULLS AWAY MONDAY...WE SHOULD SEE CONDITIONS
GRADUALLY IMPROVE THROUGH THE DAY AND ESPECIALLY MONDAY NIGHT. DRY
AIR QUICKLY MOVES IN TUESDAY AND BRINGS US SOME VERY COMFORTABLE
CONDITIONS FOR A FEW DAYS BY MID-WEEK. DRY CONDITIONS SHOULD LAST
INTO NEXT WEEKEND.

&&

.AVIATION...
ALL TERMINALS WILL BE IN IFR MOST IF NOT ALL DAY. THIS WILL LAST
THROUGH TONIGHT AS WELL. SUNDAY IS NOT LOOKING ANY BETTER. RAIN
AND POSSIBLE TS AT ALL TERMINALS WITH STRONG WIND SPEEDS ON ALL RUNWAYS.

&&

.MARINE...
WINDS HAVE BEEN INCREASING THROUGH THE NIGHT. SW PASS JUST
REPORTED A SUSTAINED WIND OF 44 KT AND GUSTS TO 52 KT. SEAS ARE
RUNNING FROM 10 TO 13 FEET WITH A PERIOD OF 7 TO 9 SECONDS.
NEEDLESS TO SAY THIS IS EXTREMELY ROUGH AND DANGEROUS. CONDITIONS
ARE NOT EXPECTED TO IMPROVE UNTIL MONDAY NIGHT INTO TUESDAY. WINDS
WILL COME AROUND TO A NORTHERLY DIRECTION MONDAY WEST OF THE RIVER
AND GRADUALLY SPILL EAST OF THE RIVER LATE IN THE DAY.

.PRELIMINARY
POINT TEMPS/POPS...
MCB 80 74 83 74 / 100 100 100 100
BTR 80 74 83 74 / 100 100 100 100
ASD 80 75 83 75 / 100 100 100 100
MSY 81 78 84 77 / 100 100 100 100
GPT 80 75 83 76 / 100 100 100 100
PQL 81 74 84 76 / 100 100 100 100

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FLASH FLOOD WATCH UNTIL 7 PM MONDAY FOR THE FOLLOWING ZONES:
     ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST
     FELICIANA...IBERVILLE...LIVINGSTON...LOWER
     JEFFERSON...LOWER LAFOURCHE...LOWER PLAQUEMINES...LOWER ST.
     BERNARD...LOWER TERREBONNE...NORTHERN
     TANGIPAHOA...ORLEANS...POINTE COUPEE...SOUTHERN
     TANGIPAHOA...ST. CHARLES...ST. HELENA...ST. JAMES...ST.
     JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER
     LAFOURCHE...UPPER PLAQUEMINES...UPPER ST. BERNARD...UPPER
     TERREBONNE...WASHINGTON...WEST BATON ROUGE...AND WEST
     FELICIANA.

     TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST
     FELICIANA...IBERVILLE...LIVINGSTON...LOWER
     JEFFERSON...LOWER LAFOURCHE...LOWER PLAQUEMINES...LOWER ST.
     BERNARD...LOWER TERREBONNE...NORTHERN
     TANGIPAHOA...ORLEANS...POINTE COUPEE...SOUTHERN
     TANGIPAHOA...ST. CHARLES...ST. HELENA...ST. JAMES...ST.
     JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER
     LAFOURCHE...UPPER PLAQUEMINES...UPPER ST. BERNARD...UPPER
     TERREBONNE...WASHINGTON...WEST BATON ROUGE...AND WEST
     FELICIANA.

GM...TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: BRETON SOUND...CHANDELEUR SOUND...COASTAL WATERS
     FROM BOOTHVILLE LA TO THE SOUTHWEST PASS OF THE MISSISSIPPI
     RIVER OUT 20 NM...COASTAL WATERS FROM PASCAGOULA MS TO
     STAKE ISLAND LA FROM 20 TO 60 NM...COASTAL WATERS FROM
     PASCAGOULA MS TO STAKE ISLAND LA OUT 20 NM...COASTAL WATERS
     FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER FROM 20 TO 60
     NM...COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA
     RIVER OUT 20 NM...COASTAL WATERS FROM STAKE ISLAND LA TO
     THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60
     NM...COASTAL WATERS FROM THE SOUTHWEST PASS OF THE
     MISSISSIPPI RIVER TO PORT FOURCHON FROM 20 TO 60
     NM...COASTAL WATERS FROM THE SOUTHWEST PASS OF THE
     MISSISSIPPI RIVER TO PORT FOURCHON OUT 20 NM...LAKE
     BORGNE...LAKE PONTCHARTRAIN AND LAKE MAUREPAS...AND
     MISSISSIPPI SOUND.

MS...FLASH FLOOD WATCH UNTIL 7 PM MONDAY FOR THE FOLLOWING ZONES:
     AMITE...HANCOCK...HARRISON...JACKSON...PEARL
     RIVER...PIKE...WALTHALL...AND WILKINSON.

     TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: AMITE...HANCOCK...HARRISON...JACKSON...PEARL
     RIVER...PIKE...WALTHALL...AND WILKINSON.

GM...TROPICAL STORM WARNING UNTIL 9 PM MONDAY FOR THE FOLLOWING
     ZONES: BRETON SOUND...CHANDELEUR SOUND...COASTAL WATERS
     FROM BOOTHVILLE LA TO THE SOUTHWEST PASS OF THE MISSISSIPPI
     RIVER OUT 20 NM...COASTAL WATERS FROM PASCAGOULA MS TO
     STAKE ISLAND LA FROM 20 TO 60 NM...COASTAL WATERS FROM
     PASCAGOULA MS TO STAKE ISLAND LA OUT 20 NM...COASTAL WATERS
     FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER FROM 20 TO 60
     NM...COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA
     RIVER OUT 20 NM...COASTAL WATERS FROM STAKE ISLAND LA TO
     THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60
     NM...COASTAL WATERS FROM THE SOUTHWEST PASS OF THE
     MISSISSIPPI RIVER TO PORT FOURCHON FROM 20 TO 60
     NM...COASTAL WATERS FROM THE SOUTHWEST PASS OF THE
     MISSISSIPPI RIVER TO PORT FOURCHON OUT 20 NM...LAKE
     BORGNE...LAKE PONTCHARTRAIN AND LAKE MAUREPAS...AND
     MISSISSIPPI SOUND.

&&

Hazardous weather outlook, Sep 3, 4:33 AM CDT, 3 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
433 AM CDT SAT SEP 3 2011

GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037-
039-040-046>050-056>072-MSZ068>071-077-080>082-040945-
LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND-
LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND-
COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER OUT
20 NM-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO PORT FOURCHON OUT 20 NM-
COASTAL WATERS FROM BOOTHVILLE LA TO THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER OUT 20 NM-
COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA OUT 20 NM-
COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER FROM
20 TO 60 NM-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO PORT FOURCHON FROM 20 TO 60 NM-
COASTAL WATERS FROM STAKE ISLAND LA TO THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER FROM 20 TO 60 NM-
COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA FROM 20 TO
60 NM-POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-
WASHINGTON-ST. TAMMANY-IBERVILLE-WEST BATON ROUGE-
EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION-ST. JAMES-
ST. JOHN THE BAPTIST-UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON-
ORLEANS-UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE-
LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON-
LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA-
SOUTHERN TANGIPAHOA-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER-
HANCOCK-HARRISON-JACKSON-
433 AM CDT SAT SEP 3 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF COASTAL WATERS
OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI.

.DAY ONE...TODAY AND TONIGHT

A TROPICAL STORM WARNING IS IN EFFECT FOR ALL OF SOUTHEAST
LOUISIANA AND COASTAL AND SOUTHWEST MISSISSIPPI. FOR MORE DETAILED
HAZARD INFORMATION...REFER TO THE LATEST LOCAL HURRICANE
STATEMENTS.

WATERSPOUT AND TORNADO ACTIVITY WILL CONTINUE AS THE CENTER OF
THE TROPICAL STORM LEE MOVES CLOSER TO SHORE.

A FLASH FLOOD WATCH IS IN EFFECT THROUGH MONDAY EVENING IN
ANTICIPATION OF FREQUENT HEAVY RAINS FROM TROPICAL SHOWERS AND
THUNDERSTORMS. THE WATCH AREA INCLUDES ALL OF SOUTHEAST LOUISIANA AS
WELL AS COASTAL AND SOUTHWEST MISSISSIPPI. WIDESPREAD RAINFALL
AMOUNTS OF 10 TO 15 INCHES WITH ISOLATED 20 INCH AMOUNTS WILL BE
POSSIBLE THROUGH MONDAY.

MINOR STORM SURGE FLOODING WILL OCCUR IN AREAS OUTSIDE OF THE
HURRICANE PROTECTION LEVEES...IN AREAS AROUND LAKES PONTCHARTRAIN
AND MAUREPAS...AND ALONG THE IMMEDIATE MISSISSIPPI COAST AND BAYS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A TROPICAL STORM WARNING WILL REMAIN IN EFFECT FOR ALL OF SOUTHEAST
LOUISIANA AND COASTAL AND SOUTHWEST MISSISSIPPI THROUGH MONDAY
EVENING. FOR MORE DETAILED HAZARD INFORMATION...REFER TO THE LATEST
LOCAL HURRICANE STATEMENTS.

A FLASH FLOOD WATCH WILL REMAIN IN EFFECT THROUGH MONDAY EVENING IN
ANTICIPATION OF FREQUENT HEAVY RAINS FROM TROPICAL SHOWERS AND
THUNDERSTORMS. THE WATCH AREA INCLUDES ALL OF SOUTHEAST LOUISIANA AS
WELL AS COASTAL AND SOUTHWEST MISSISSIPPI. WIDESPREAD RAINFALL
AMOUNTS OF 10 TO 15 INCHES WITH ISOLATED 20 INCH AMOUNTS WILL BE
POSSIBLE THROUGH MONDAY.

WATERSPOUT AND TORNADO ACTIVITY WILL CONTINUE AS THE CENTER OF THE
TROPICAL STORM LEE MOVES CLOSER TO SHORE. THIS THREAT WILL
CONTINUE THROUGH MONDAY.

MINOR STORM SURGE FLOODING WILL CONTINUE IN AREAS OUTSIDE OF THE
HURRICANE PROTECTION LEVEES...IN AREAS AROUND LAKES PONTCHARTRAIN
AND MAUREPAS...AND ALONG THE IMMEDIATE MISSISSIPPI COAST AND BAYS
THROUGH MONDAY.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS MAY BE NEEDED THROUGH MONDAY...PRIMARILY
FOR COASTAL FLOODING AND FLASH FLOODING CONCERNS. EMERGENCY
MANAGEMENT OFFICIALS SHOULD CLOSELY MONITOR THE WEATHER SITUATION
AND BE PREPARED TO ACTIVATE FOR TROPICAL WEATHER OPERATIONS.

In the hours before

Local storm report, Sep 3, 3:49 AM CDT, 4 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
349 AM CDT SAT SEP 03 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 AM     TSTM WND DMG     KILLIAN                 30.35N 90.58W
09/03/2011                   LIVINGSTON         LA   UTILITY COMPANY

            ENTERGY REPORTED A POWER LINE DOWN BELOW WARSAW LANDING
            WITH 111 CUSTOMERS WITHOUT POWER.

0207 AM     TSTM WND DMG     5 SE LAKEFRONT AIRPORT  29.99N 89.97W
09/03/2011                   ST. BERNARD        LA   UTILITY COMPANY

            ENTERGY ELECTRIC REPORTING 708 CUSTOMERS WITHOUT POWER
            BETWEEN CROWDER AND READ BLVD FROM CHEF MENTEUR ROAD
            NORTH TO DWYER ROAD.

0211 AM     TSTM WND DMG     3 SE CONVENT            29.99N 90.79W
09/03/2011                   ST. JAMES          LA   UTILITY COMPANY

            ENTERGY REPORTS 625 CUSTOMERS WITHOUT POWER NEAR OAK
            ALLEY.

0211 AM     TSTM WND DMG     GRAY                    29.68N 90.78W
09/03/2011                   TERREBONNE         LA   UTILITY COMPANY

            ENTERGY REPORTING 357 CUSTOMERS WITHOUT POWER.

0230 AM     TSTM WND DMG     10 E PONCHATOULA        30.44N 90.28W
09/03/2011                   TANGIPAHOA         LA   UTILITY COMPANY

            ENTERGY ELECTRIC REPORTING 597 RESIDENTS WITHOUT POWER
            MOSTLY IN THE BEDICO AND LEE LANDING AREAS.

0242 AM     TSTM WND DMG     METAIRIE                30.00N 90.18W
09/03/2011                   JEFFERSON          LA   UTILITY COMPANY

            ENTERGY ELECTRIC REPORTING 1498 CUSTOMERS WITHOUT POWER
            BETWEEN CAUSEWAY BLVD AND 17TH ST CANAL IN THE VICINITY
            OF VETERANS AND I-10.

0248 AM     TSTM WND DMG     PAINCOURTVILLE          29.99N 91.05W
09/03/2011                   ASSUMPTION         LA   UTILITY COMPANY

            ENTERGY REPORTING 576 CUSTOMERS WITHOUT POWER ALONG
            HIGHWAY 1.

0326 AM     TSTM WND DMG     MANDEVILLE              30.37N 90.08W
09/03/2011                   ST. TAMMANY        LA   UTILITY COMPANY

            WASHINGTON-ST TAMMANY ELECTRIC COOP REPORTING 1319 HOMES
            WITHOUT POWER THROUGH THEIR SERVICE AREA IN WASHINGTON
            AND ST TAMMANY PARISHES. MOST OUTAGES ARE IN THE
            MANDEVILLE AREA WITH 947 REPORTED OUTAGES. SLIDELL HAS
            315 OUTAGES.

0331 AM     TSTM WND DMG     SLIDELL                 30.28N 89.78W
09/03/2011                   ST. TAMMANY        LA   UTILITY COMPANY

            CLECO ELECTRIC REPORTS 723 CUSTOMERS WITHOUT POWER
            THROUGHOUT THEIR SERVICE AREA. MOST OUTAGES ARE IN ST
            TAMMANY NEAR SLIDELL WITH 663 RESIDENTS REPORTED WITHOUT
            POWER.

0348 AM     TSTM WND DMG     BATON ROUGE             30.45N 91.13W
09/03/2011                   EAST BATON ROUGE   LA   UTILITY COMPANY

            ENTERGY IS REPORTING SCATTERED MINOR OUTAGES THROUGHOUT
            THE GREATER BATON ROUGE AREA.

&&

24/RR

Local storm report, Sep 3, 6:28 AM CDT, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
628 AM CDT SAT SEP 03 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0617 AM     TROPICAL STORM   LAKEFRONT AIRPORT       30.04N 90.03W
09/03/2011                   ORLEANS            LA   ASOS

            MEASURED WINDS 100 DEGREES 34 KT GUST 48 KT...39 MPH GUST
            56 MPH.

&&

24/RR

Local storm report, Sep 3, 6:53 AM CDT, 1 hour 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
653 AM CDT SAT SEP 03 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0627 AM     FLOOD            HARAHAN                 29.94N 90.20W
09/03/2011                   JEFFERSON          LA   PUBLIC

            1.50-1.74 INCHES OF RAIN IN LESS THAN 1 HOUR AT THE END
            OF DICKORY AVE NEAR THE RIVER.

0648 AM     FLASH FLOOD      NEW ORLEANS             29.97N 90.08W
09/03/2011                   ORLEANS            LA   EMERGENCY MNGR

            STREET FLOODING NEAR TOURO INFIRMARY.

0649 AM     COASTAL FLOOD    14 E NEW ORLEANS        29.97N 89.85W
09/03/2011                   ST. BERNARD        LA   EMERGENCY MNGR

            1 FOOT OF WATER IN STREETS OF VENETIAN ISLES SUBDIVISION
            NEAR CHEF PASS. HIGHWAY 90 WAS REPORTED PASSIBLE BUT
            WATER RISING NEAR CHEF PASS BRIDGE.

&&

24/RR

Local storm report, Sep 3, 8:13 AM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
813 AM CDT SAT SEP 03 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0750 AM     FLASH FLOOD      WALKER                  30.48N 90.87W
09/03/2011                   LIVINGSTON         LA   PUBLIC

            CREEK IS OUT OF BANKS...FLASH FLOODING AT MULTIPLE
            LOCATIONS IN WALKER...HEAVY RAIN WITH 4.0 INCHES OR MORE
            IN 2.5 HOURS.

&&

JS

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 2, 9:48 PM CDT	Special Marine Warning	LIX		27 min
Sep 2, 9:55 PM CDT	Tornado Warning	LIX	Terrebonne	35 min
Sep 3, 12:58 AM CDT	Tornado Warning	LIX	Lafourche, Terrebonne	32 min
Sep 3, 1:19 AM CDT	Tornado Warning	LIX	Assumption, Terrebonne	26 min
Sep 3, 2:16 AM CDT	Tornado Warning	LIX	Lafourche	29 min
Sep 3, 2:23 AM CDT	Tornado Warning	LIX	Ascension, East Baton Rouge, Iberville, West Baton Rouge	22 min
Sep 3, 2:37 AM CDT	Tornado Warning	LIX	Saint Bernard	23 min
Sep 3, 2:45 AM CDT	Tornado Warning	LIX	Lafourche, Saint James, Saint John the Baptist	30 min
Sep 3, 2:48 AM CDT	Tornado Warning	LIX	Jefferson, Lafourche, Saint Charles	27 min
Sep 3, 2:53 AM CDT	Special Marine Warning	LIX		52 min
Sep 3, 3:12 AM CDT	Tornado Warning	LIX	Lafourche, Saint Charles, Saint John the Baptist	33 min
Sep 3, 3:25 AM CDT	Special Marine Warning	LIX		20 min
Sep 3, 3:27 AM CDT	Tornado Warning	LIX	Plaquemines	33 min
Sep 3, 3:37 AM CDT	Special Marine Warning	LIX		23 min
Sep 3, 3:40 AM CDT	Tornado Warning	LIX	Ascension, Livingston, Saint James, Saint John the Baptist	35 min
Sep 3, 3:46 AM CDT	Special Marine Warning	LIX		44 min
Sep 3, 4:17 AM CDT	Special Marine Warning	LIX		28 min
Sep 3, 4:18 AM CDT	Tornado Warning	LIX	Orleans, Saint Tammany	27 min
Sep 3, 4:21 AM CDT	Special Marine Warning	LIX		24 min
Sep 3, 4:33 AM CDT	Tornado Warning	LIX	Livingston, Saint John the Baptist, Tangipahoa	27 min
Sep 3, 4:36 AM CDT	Tornado Warning	LIX	Orleans, Plaquemines, Saint Bernard	24 min
Sep 3, 4:41 AM CDT	Tornado Warning	LIX	Jefferson, Plaquemines, Saint Charles	34 min
Sep 3, 4:44 AM CDT	Special Marine Warning	LIX		31 min
Sep 3, 4:45 AM CDT	Tornado Warning	LIX	Saint Tammany, Tangipahoa	45 min
Sep 3, 4:56 AM CDT	Tornado Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	49 min
Sep 3, 4:58 AM CDT	Tornado Warning	LIX	East Baton Rouge, Livingston, Saint Helena, Tangipahoa	47 min
Sep 3, 5:01 AM CDT	Special Marine Warning	LIX		29 min
Sep 3, 5:11 AM CDT	Tornado Warning	LIX	Jefferson, Plaquemines, Saint Charles	49 min
Sep 3, 5:18 AM CDT	Tornado Warning	LIX	Plaquemines	27 min
Sep 3, 5:26 AM CDT	Special Marine Warning	LIX		34 min
Sep 3, 5:30 AM CDT	Special Marine Warning	LIX		45 min
Sep 3, 5:41 AM CDT	Tornado Warning	LIX	Livingston, Saint John the Baptist, Tangipahoa	49 min
Sep 3, 5:46 AM CDT	Tornado Warning	LIX	Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles	44 min
Sep 3, 5:50 AM CDT	Special Marine Warning	LIX		40 min
Sep 3, 6:01 AM CDT	Special Marine Warning	LIX		44 min
Sep 3, 6:17 AM CDT	Tornado Warning	LIX	Saint Tammany, Washington	43 min
Sep 3, 6:29 AM CDT	Tornado Warning	LIX	Ascension, East Baton Rouge, Livingston, Saint John the Baptist	46 min
Sep 3, 6:37 AM CDT	Tornado Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	38 min
Sep 3, 6:44 AM CDT	Special Marine Warning	LIX		46 min
Sep 3, 6:58 AM CDT	Tornado Warning	LIX	Saint Tammany, Washington	47 min
Sep 3, 7:15 AM CDT	Tornado Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	45 min
Sep 3, 7:15 AM CDT	Tornado Warning	LIX	Ascension, East Baton Rouge, Livingston, Saint Helena, Saint John the Baptist, Tangipahoa and 1 more	60 min
Sep 3, 7:18 AM CDT	Special Marine Warning	LIX		42 min
Sep 3, 7:23 AM CDT	Flash Flood Warning	LIX	Saint Tammany	3 hr
Sep 3, 7:26 AM CDT	Special Marine Warning	LIX		49 min
Sep 3, 7:44 AM CDT	Tornado Warning	LIX	Saint Tammany	61 min
Sep 3, 8:00 AM CDT	Special Marine Warning	LIX		45 min
Sep 3, 8:03 AM CDT	Flash Flood Warning	LIX	East Baton Rouge, Livingston, Saint Helena, Tangipahoa	6 hr
Sep 3, 8:08 AM CDT	Tornado Warning	LIX	Orleans, Saint Bernard	37 min
Sep 3, 8:18 AM CDT	Special Marine Warning	LIX		42 min
Sep 3, 8:21 AM CDT	Special Marine Warning	LIX		24 min
Sep 3, 8:42 AM CDT	Tornado Warning	LIX	Saint Tammany, Washington	63 min
Sep 3, 8:57 AM CDT	Special Marine Warning	LIX		33 min
Sep 3, 9:10 AM CDT	Tornado Warning	LIX	Livingston, Saint Helena, Tangipahoa	65 min
Sep 3, 9:40 AM CDT	River Flood Warning	LIX	East Baton Rouge	3 days
Sep 3, 10:12 AM CDT	River Flood Warning	LIX	Livingston	5 days
Sep 3, 10:17 AM CDT	River Flood Warning	LIX	Saint Tammany	3 days
Sep 3, 10:19 AM CDT	Special Marine Warning	LIX		26 min
Sep 3, 12:17 PM CDT	Special Marine Warning	LIX		28 min
Sep 3, 12:53 PM CDT	Tornado Warning	LIX	Saint Helena, Tangipahoa	37 min
Sep 3, 12:59 PM CDT	Tornado Warning	LIX	Saint Charles, Saint John the Baptist	31 min
Sep 3, 1:02 PM CDT	Tornado Warning	LIX	Saint Tammany, Tangipahoa	43 min
Sep 3, 1:29 PM CDT	Tornado Warning	LIX	East Feliciana, Saint Helena, Tangipahoa	31 min
Sep 3, 1:38 PM CDT	Special Marine Warning	LIX		37 min
Sep 3, 1:46 PM CDT	Tornado Warning	LIX	Livingston, Saint John the Baptist, Tangipahoa	29 min
Sep 3, 2:08 PM CDT	Special Marine Warning	LIX		22 min
Sep 3, 2:15 PM CDT	Tornado Warning	LIX	East Baton Rouge, Livingston, Saint Helena, Tangipahoa	30 min
Sep 3, 2:53 PM CDT	Tornado Warning	LIX	East Baton Rouge, East Feliciana, Livingston, Saint Helena	37 min
Sep 3, 3:32 PM CDT	Tornado Warning	LIX	East Baton Rouge, East Feliciana, West Feliciana	28 min
Sep 3, 3:57 PM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines	3 hr
Sep 3, 4:58 PM CDT	Special Marine Warning	LIX		62 min
Sep 3, 6:02 PM CDT	Special Marine Warning	LIX		58 min
Sep 3, 6:25 PM CDT	Special Marine Warning	LIX		35 min
Sep 3, 6:35 PM CDT	Tornado Warning	LIX	Plaquemines	25 min
Sep 3, 6:51 PM CDT	Tornado Warning	LIX	Plaquemines	39 min
Sep 3, 6:53 PM CDT	Special Marine Warning	LIX		52 min
Sep 3, 6:59 PM CDT	Special Marine Warning	LIX		46 min

Nearby

Tornado Warnings in Louisiana, 2011 Every tornado warning in 2011 Tornadoes 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.