Alert archive / Louisiana / Flash Flood Warnings in 2005

Flash Flood Warning 27, NWS New Orleans, LA

September 23, 2005Orleans Parish, Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Sep 23, 2005, 9:52 AM CDT for Orleans Parish, Saint Bernard Parish, Louisiana. It was in force for 6 hr. 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 23, 2005, 9:52 AM CDT (14:52 UTC)
Expired: Sep 23, 2005, 3:45 PM CDT
In force: 6 hr
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

Counties Orleans Parish, LA, Saint Bernard Parish, LA

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.9 hours before the alert went out and 38 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: 377 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 298 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KLIX 231455
FFWLIX
LAC071-087-232045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
952 AM CDT FRI SEP 23 2005

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ORLEANS PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF EAST NEW ORLEANS AND LOWER NINTH WARD
  ST. BERNARD PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES ARABI AND CHALMETTE

* UNTIL 345 PM CDT

* AT 948 AM CDT...SEVERAL RELIABLE SOURCES ARE REPORTING AN 
  OVERTOPPING OF THE LEVEE ON THE INDUSTRIAL CANAL BETWEEN CLAIBORNE 
  AVENUE AND FLORIDA AVENUE. THOSE AREAS FLOODED DURING HURRICANE 
  KATRINA WILL FLOOD ONCE AGAIN WITH 3 TO 8 FEET OF WATER...MAINLY 
  IN THE LOWER NINTH WARD...ARABI AND CHALMETTE. 

LAT...LON 2988 8989 2979 8973 3009 8984 3008 8994
      2997 8998 2992 8989

$$

24

1 follow-up statement

000 
WGUS74 KLIX 231850
FFSLIX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
142 PM CDT FRI SEP 23 2005

LAC071-087-232045-
ORLEANS LA-ST. BERNARD LA-
142 PM CDT FRI SEP 23 2005

...A FLASH FLOOD WARNING CONTINUES FOR ST. BERNARD AND ORLEANS 
   PARISHES...

AT 142 PM CDT...MEDIA COVERAGE AND LOCAL OFFICIALS CONTINUE 
TO REPORT A SIGNIFICANT OVERTOP OF THE INDUSTRIAL CANAL LEVEE NEAR 
FLORIDA AVENUE. INUNDATION OF THE LOWER NINTH WARD...ARABI AND 
CHALMETTE CAN BE EXPECTED WITH 3 FEET TO AS MUCH AS 8 FEET IN THE 
LOWEST LYING AREAS. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO EAST NEW 
ORLEANS...LOWER NINTH WARD...ARABI...CHALMETTE...MERAUX AND VIOLET.

THESE AREAS HAVE BEEN EVACUATED OF MOST CITIZENS...HOWEVER 
INDIVIDUALS INVOLVED IN SEARCH AND RESCUE OPERATIONS AND LAW 
ENFORCEMENT SHOULD MOVE TO HIGHER ELEVATIONS AND ANTICIPATE RISES IN 
WATER LEVELS IN THE AFFECTED AREAS THROUGH THE REMAINDER OF THE DAY. 

LAT...LON 2988 8989 2979 8973 3009 8984 3008 8994
      2997 8998 2992 8989

$$

24

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Sep 23, 6:00 AM CDT, 3 hours 52 minutes earlier.

Area forecast discussion, Sep 23, 6:00 AM CDT, 3 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
600 AM CDT FRI SEP 23 2005

.DISCUSSION...
THANKS TO KMOB FOR TAKING OVER OUR PRODUCTS WHEN ALL THE T-1 LINES
WERE CUT AT 1:30 AM. HURRICANE RITA CONTINUESA ON A TRACK NEAR 303
DEGREES AT 7 TO 8 KT HEADING TOWARDS UPPER TX COAST NEAR SABINE PASS
SUNDAY. TIDES COMING UP TO 4 FEET NEAR DAUPHINE ISLAND. EXPOEWCT
TIDES OF 4 TO 5 FEET WEST OF KPQL TO LAKE PONTCHARTRIAN TODAY AS
TROPICAL STORM WINDS PUSH TIDES AND WATER UP.
PATERN WILL NOT CHANGE UNTIL THE END OF THE PERIOD AS THE REMNANTS
OF RITA MOVE FURTHER FROM THE AREA.

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  83  74  83  73 /  30  80 100 100
BTR  83  76  84  74 /  40 100 100 100
MSY  85  79  85  77 /  60 100 100 100
GPT  84  78  83  76 /  60 100 100 100

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FLOOD WATCH IN EFFECT THROUGH SATURDAY FOR LAZ034-LAZ035-
     LAZ036-LAZ037-LAZ038-LAZ039-LAZ040-LAZ046-LAZ047-LAZ048-
     LAZ049-LAZ050-LAZ056-LAZ057-LAZ058-LAZ059-LAZ060-LAZ061-
     LAZ062-LAZ063-LAZ064-LAZ065-LAZ066-LAZ067-LAZ068-LAZ069-
     LAZ070.

     INLAND TROPICAL STORM WARNING THROUGH SATURDAY FOR LAZ034-
     LAZ035-LAZ036-LAZ037-LAZ038-LAZ040-LAZ046-LAZ047-LAZ048-
     LAZ049-LAZ050-LAZ056-LAZ057-LAZ058-LAZ059-LAZ060-LAZ061-
     LAZ062-LAZ063-LAZ064-LAZ065-LAZ066-LAZ067-LAZ068-LAZ069-
     LAZ070.

     TROPICAL STORM WARNING THROUGH SATURDAY FOR LAZ038-LAZ040-
     LAZ050-LAZ056-LAZ058-LAZ059-LAZ060-LAZ061-LAZ062-LAZ063-
     LAZ064-LAZ065-LAZ066-LAZ067-LAZ068-LAZ069-LAZ070.

     WIND ADVISORY IN EFFECT FOR FRIDAY INTO SATURDAY FOR LAZ039.

MS...FLOOD WATCH IN EFFECT THROUGH SATURDAY FOR MSZ068-MSZ069-
     MSZ070-MSZ071-MSZ077-MSZ080-MSZ081-MSZ082.

     INLAND TROPICAL STORM WARNING THROUGH SATURDAY FOR MSZ068.

     WIND ADVISORY IN EFFECT FOR FRIDAY INTO SATURDAY FOR MSZ069-
     MSZ070-MSZ071-MSZ077-MSZ080-MSZ081-MSZ082.

GM...TROPICAL STORM WARNING THROUGH SATURDAY FOR GMZ530-GMZ550-
     GMZ555-GMZ570-GMZ575.

&&

Hazardous weather outlook, Sep 23, 6:00 AM CDT, 3 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
600 AM CDT FRI SEP 23 2005

LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-231600-
AMITE-ASCENSION-ASSUMPTION-EAST BATON ROUGE-EAST FELICIANA-HANCOCK-
HARRISON-IBERVILLE-JACKSON-LIVINGSTON-LOWER JEFFERSON-
LOWER LAFOURCHE-LOWER PLAQUEMINES-LOWER ST. BERNARD-LOWER TERREBONNE-
ORLEANS-PEARL RIVER-PIKE-POINTE COUPEE-ST. CHARLES-ST. HELENA-
ST. JAMES-ST. JOHN THE BAPTIST-ST. TAMMANY-TANGIPAHOA-
UPPER JEFFERSON-UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST. BERNARD-
UPPER TERREBONNE-WALTHALL-WASHINGTON-WEST BATON ROUGE-WEST FELICIANA-
WILKINSON-
600 AM CDT FRI SEP 23 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND SOUTHEAST
LOUISIANA AND EXTREME SOUTHWEST...SOUTH CENTRAL AND COASTAL
MISSISSIPPI.

.DAY ONE...TODAY AND TONIGHT

TROPICAL STORM CONDITIONS...
A TROPICAL STORM WARNING IS IN EFFECT FOR THE LOUISIANA COAST FROM
EAST OF MORGAN CITY TO THE MOUTH OF THE PEARL RIVER INCLUDING LAKES
PONTCHARTRAIN AND MAUREPAS AND AN INLAND TROPICAL STORM WIND WARNING
IS IN EFFECT FOR INLAND AREAS OF SOUTHEAST LOUISIANA. TROPICAL STORM
CONDITIONS ARE EXPECTED ALONG THE COAST AND INLAND TODAY AND TONIGHT.
REFER TO THE LATEST HURRICANE LOCAL ACTION STATEMENTS REGARDING
HURRICANE RITA IN THE WARNING AREAS.

COASTAL FLOODING...
A COASTAL FLOOD WARNING IS IN EFFECT FOR THE ENTIRE MISSISSIPPI
COAST. TIDES ARE EXPECTED TO INCREASE TODAY AND REACH 4 TO 5 FEET
ABOVE NORMAL.

HEAVY RAINFALL...
A FLOOD WATCH IS IN EFFECT FOR ALL OF SOUTHEAST LOUISIANA AND
SOUTHWEST AND COASTAL MISSISSIPPI THROUGH SATURDAY. RAINFALL AMOUNTS
OF 3 TO 5 INCHES CAN BE EXPECTED IN THE WATCH AREA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

FRINGE AFFECTS FROM HURRICANE RITA WILL CONTINUE THROUGH LANDFALL
EARLY SATURDAY MORNING...FOLLOWED BY A HEAVY RAIN THREAT FROM A SLOW
MOVING...DECAYING HURRICANE OVER EAST TEXAS AND WEST LOUISIANA
THROUGH NEXT TUESDAY. THERE WILL BE A POTENTIAL FOR RAINFALL AND
RUNOFF FLOODING THROUGH NEXT WEEK...DEPENDING ON THE FUTURE TRACK OF
RITA AND ORIENTATION OF RAIN BANDS OVER THE OUTLOOK AREA...MAINLY IN
LOUISIANA AND EXTREME SOUTHWEST MISSISSIPPI.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT
PERSONNEL...IN SUPPORT OF HURRICANE RITA AND HURRICANE KATRINA
RECOVERY IS ACTIVATED AT THIS TIME.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 23, 10:00 AM CDT	Tornado Warning	LIX	Ascension, Saint Charles, Saint James, Saint John the Baptist	30 min
Sep 23, 10:34 AM CDT	Tornado Warning	LIX	Ascension, Iberville, Saint James	26 min
Sep 23, 10:39 AM CDT	Tornado Warning	LIX	Assumption, Lafourche, Saint James	36 min
Sep 23, 10:44 AM CDT	Tornado Warning	LIX	Saint Charles, Saint James, Saint John the Baptist	31 min
Sep 23, 11:11 AM CDT	Tornado Warning	LIX	Orleans	19 min
Sep 23, 11:17 AM CDT	Tornado Warning	LIX	Terrebonne	28 min
Sep 23, 11:54 AM CDT	Tornado Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Saint John the Baptist	36 min
Sep 23, 1:00 PM CDT	Tornado Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Charles	30 min
Sep 23, 1:24 PM CDT	Tornado Warning	LIX	East Baton Rouge, Livingston	36 min
Sep 23, 1:26 PM CDT	Tornado Warning	LIX	Ascension, Livingston	34 min
Sep 23, 2:09 PM CDT	Tornado Warning	LIX	Assumption, Lafourche, Saint James, Terrebonne	36 min
Sep 23, 2:21 PM CDT	Tornado Warning	LIX	Saint Tammany	24 min
Sep 23, 3:33 PM CDT	Tornado Warning	LIX	Lafourche, Saint James	27 min
Sep 23, 4:42 PM CDT	Tornado Warning	LIX	Livingston, Tangipahoa	33 min
Sep 23, 5:14 PM CDT	Tornado Warning	LIX	Livingston, Tangipahoa	31 min

Nearby

Flash Flood Warnings in Louisiana, 2005 Every flash flood warning in 2005

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.