Alert archive / Louisiana / Flash Flood Warnings in 2004
Flash Flood Warning 38, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Oct 9, 2004, 9:16 AM CDT for Terrebonne Parish, Louisiana. It was in force for 3 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
- Oct 9, 2004, 9:16 AM CDT (14:16 UTC)
- Expired
- Oct 9, 2004, 12:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS New Orleans, LA
- Area
- Counties, with a storm outline in the text
County Terrebonne 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, 2.3 hours before the alert went out and 140 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 714 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 210 m²/s²
- 0-3 km storm-relative helicity
- 329 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KLIX 091422 FFWNEW LAC109-091715- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 916 AM CDT SAT OCT 9 2004 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A * FLASH FLOOD WARNING FOR... TERREBONNE PARISH IN SOUTHEAST LOUISIANA * UNTIL 1215 PM CDT * AT 910 AM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED ABOUT 10 HOMES WERE FLOODED AND ROADS WERE CLOSED DUE TO HIGH WATER IN THE TOWNS OF CHAUVIN...DULAC...MONGEGUT AND POINTE AU CHIEN. THE COMBINATION OF 4 INCHES OF HEAVY RAIN THAT FELL DURING EARLY THIS MORNING WILL BE SLOW TO DRAIN DUE TO TIDAL FLOODING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. LAT...LON 2910 9079 2926 9041 2974 9081 2970 9094 $$
1 follow-up statement
000 WGUS74 KLIX 091652 FFSNEW LAC109-091715- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1150 AM CDT SAT OCT 9 2004 ...THE FLASH FLOOD WARNING FOR TERREBONNE PARISH IS CANCELLED... ...THE FLOOD WATCH REMAINS IN EFFECT FOR TERREBONNE PARISH... ONLY MINOR STREET FLOODING WAS REPORTED IN HOUMA AREA BY TERREBONNE PARISH EMERGENCY MANAGEMENT OFFICIALS. RADAR SHOWED SPOTTY LIGHT RAIN WAS OCCURRING IN TERREBONNE PARISH. HOWEVER...MORE RAIN AND NUMEROUS SHOWERS REMAIN OFF THE LOUISIANA COAST...THREATENING TERREBONNE PARISH LATER TODAY. COASTAL TIDAL FLOODING CONTINUES IN LOWER TERREBONNE PARISH TOWNS OF DULAC...MONTEGUT...CHAUVIN AND POINTE AU CHIEN WHERE ROADS REMAIN FLOODED WITH SEVERAL FEET OF WATER ACCORDING TO EMERGENCY MANAGEMENT OFFICIALS. LAT...LON 2910 9079 2926 9041 2974 9081 2970 9094 $$
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 Oct 9, 6:09 AM CDT, 3 hours 7 minutes earlier.
Area forecast discussion, Oct 9, 6:09 AM CDT, 3 hours 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 535 AM SAT OCT 9 2004 .DISCUSSION... DELAYED DISCUSSION THANKS TO TROPICAL STORM MATTHEW AND RESULTANT COASTAL FLOODING. LOOKING AT LATEST SATELLITE DATA AND RADAR FEEDS FROM SLIDELL AND LAKE CHARLES...APPEARS THAT MATTHEW IS DEFINITELY A HYBRID SYSTEM AT THIS TIME. EXPECT THE STORM TO TURN INTO A MORE BAROCLINIC SYSTEM TODAY...DUE TO STRONG SHEAR AND DRY AIR WRAPPING INTO THE SYSTEM. HOWEVER...WILL STILL BE A POTENT RAIN AND WIND PRODUCER FOR OUR AREA...AS TROPICAL MOISTURE IS PULLED NORTHWARD BY UPPER LEVEL TROUGH OVER SOUTHERN PLAINS. EXPECT SIGNIFICANT RAINFALLS TO CONTINUE THROUGH THE EVENING HOURS...WITH LOCALIZED FLOODING CONTINUING. WINDS WILL REMAIN STRONG FROM THE EAST...AS TIGHT PRESSURE GRADIENTS BETWEEN RIDGING TO THE NORTHEAST AND SYSTEM TO THE SOUTH CONTINUE. EXPECT COASTAL FLOODING ISSUES TO REMAIN THROUGH THE EVENING HOURS...WITH LESSENING OF GRADIENTS OVERNIGHT...AS SYSTEM MOVES THROUGH AREA...AND RIDGING WEAKENS TO THE NORTHEAST. GOING INTO TONIGHT AND TOMORROW...EXPECT HEAVY RAIN CHANCES TO DIMINISH...AS DRY MIDLEVEL AIR WRAPS AROUND THE LOW PRESSURE CENTER AND INTO OUR AREA. REDUCED POPS TO LIKELY TONIGHT...AND CHANCE FOR TOMORROW. FLOOD THREAT SHOULD DECREASE DRAMATICALLY TONIGHT. MONDAY THROUGH WEDNESDAY LOOK DRY...AS STRONG SUBSIDENCE AND DRY AIR MOVE INTO THE AREA IN THE WAKE OF THE UPPER LEVEL LOW. MODELS INDICATE A VERY STRONG UPPER LEVEL TROUGH DEVELOPING IN THE NORTHWEST BY MIDWEEK AND DIVING INTO THE EASTERN UNITED STATES FOR THE WEEKEND. STRONG FRONT WILL SLIDE THROUGH THE AREA WEDNESDAY NIGHT INTO EARLY THURSDAY. LOOKS LIKE LITTLE MOISTURE RETURN...SO ONLY GOING WITH ISOLATED POPS. FRIDAY AND SATURDAY LOOK DRY AS STRONG SUBSIDENCE ONCE AGAIN DEVELOPS OVER AREA. && .POINT TEMP/POPS... MCB 70 66 74 65 / ++ 90 70 40 BTR 73 68 76 66 / ++ 80 50 20 MSY 75 71 79 68 / ++ 80 50 20 GPT 74 70 78 67 / ++ 90 60 30 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...COASTAL FLOOD WARNING FOR LA COASTAL LOCATIONS... LAZ038-040-050-058-060>064-066>070. FLOOD WATCH FOR ALL SE LA PARISHES...LAZ034>040-046>050-056>070. MS...COASTAL FLOOD WARNING FOR MSZ080. FLOOD WATCH FOR FOLLOWING MS COUNTIES...MSZ068>071-077-080>082. SE LA AND MS COASTAL WATERS... SMALL CRAFT ADVISORY FOR ALL COASTAL WATERS INCLUDING LAKES. && 32
Hazardous weather outlook, Oct 9, 6:30 AM CDT, 2 hours 46 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 630 AM CDT SAT OCT 9 2004 LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-091600- 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- 630 AM CDT SAT 09 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND SOUTHEAST LOUISIANA AND EXTREME SOUTHWEST...SOUTH CENTRAL AND COASTAL MISSISSIPPI. .DAY ONE...TODAY AND TONIGHT HEAVY RAIN AND FLOODING... A FLOOD WATCH IS IN EFFECT FOR ALL OF EAST CENTRAL AND SOUTHEAST LOUISIANA AND EXTREME SOUTH MISSISSIPPI. TROPICAL STORM MATTHEW WILL CONTINUE TO MOVE TO THE NORTHEAST ACROSS THROUGH THE CENTRAL AND NORTHERN GULF OF MEXICO...TOWARD SOUTHEAST LOUISIANA AND COASTAL MISSISSIPPI. DEEP TROPICAL MOISTURE EXTENDING NORTH FROM THE TROPICAL STORM INTO THE REGION WILL BRING PERIODS OF HEAVY RAIN AND POSSIBLE FLOODING TODAY. DRIER AIR IS EXPECTED TO WRAP INTO THE SYSTEM THIS AFTERNOON...LIMITING THE HEAVY RAIN AND FLOODING THREAT OVERNIGHT. SEVERE THUNDERSTORMS... AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE TODAY. THE MAIN HAZARD WILL BE STRONG DAMAGING WINDS AND POSSIBLY AN ISOLATED TORNADO. OTHERWISE...ONLY ISOLATED THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT ACROSS MOST LAND AREAS. THESE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING OCCASIONAL LIGHTNING...HEAVY RAINFALL...AND WIND GUSTS TO 40 MPH. MARINE... A COASTAL FLOOD WARNING IS IN EFFECT FROM BAY SAINT LOUIS MISSISSIPPI TO MORGAN CITY LOUISIANA INCLUDING THE PARISHES SURROUNDING LAKES PONTCHARTRAIN AND MAUREPAS THROUGH 11 AM. SOUTHEAST WINDS OF 25 TO 30 MPH WILL ALLOW TIDES TO REMAIN NEAR 3 FEET ABOVE NORMAL WHICH WILL CAUSE COASTAL FLOODING TO SOME AREAS OUTSIDE OF HURRICANE PROTECTION LEVEES. SEAS WILL BE NEAR 9 FEET...SO A SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR THE COASTAL WATERS AND TIDAL LAKES. WINDS ARE EXPECTED TO DECREASE THIS AFTERNOON AND TONIGHT. WATERSPOUTS WILL BE A POSSIBILITY AS WELL THROUGH TODAY. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED SUNDAY IN THE WAKE OF TROPICAL STORM MATTHEW. ISOLATED SHOWERS AND THUNDERSTORMS ARE ALSO POSSIBLE WEDNESDAY NIGHT INTO THURSDAY...AS A COLD FRONT MOVES THROUGH. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT PERSONNEL...IN SUPPORT OF SEVERE WEATHER OPERATIONS...IS NOT REQUESTED AT THIS TIME. HOWEVER...ANY SIGNIFICANT RAINFALL REPORTS OR OBSERVED FLOODING PLEASE CONTACT YOUR LOCAL LAW ENFORCEMENT OR NATIONAL WEATHER SERVICE OFFICE. 32
In the hours before
Local storm report, Oct 9, 7:53 AM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
753 AM CDT SAT OCT 09 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0200 AM FLASH FLOOD HOUMA 29.58N 90.71W
10/09/2004 TERREBONNE LA EMERGENCY MNGR
MANY HOMES FLOODED AND MANY ROADS CLOSED
0730 AM FLASH FLOOD HAHNVILLE 29.97N 90.42W
10/09/2004 ST. CHARLES LA EMERGENCY MNGR
WATER IN APARTMENT
&&
17The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 8, 11:56 PM CDT | Flash Flood Warning | LIX | Terrebonne | 4 hr |
| Oct 9, 3:40 AM CDT | Flash Flood Warning | LIX | Terrebonne | 6 hr |
| Oct 9, 6:31 AM CDT | Special Marine Warning | LIX | 119 min | |
| Oct 9, 6:31 AM CDT | Special Marine Warning | LIX | 119 min | |
| Oct 9, 6:31 AM CDT | Special Marine Warning | LIX | 119 min | |
| Oct 9, 7:34 AM CDT | Flash Flood Warning | LIX | Saint Charles | 4 hr |
| Oct 9, 8:28 AM CDT | Special Marine Warning | LIX | 62 min | |
| Oct 9, 8:28 AM CDT | Special Marine Warning | LIX | 62 min | |
| Oct 9, 9:27 AM CDT | Special Marine Warning | LIX | 63 min | |
| Oct 9, 9:27 AM CDT | Special Marine Warning | LIX | 63 min | |
| Oct 9, 10:45 AM CDT | Special Marine Warning | LIX | 60 min | |
| Oct 9, 10:45 AM CDT | Special Marine Warning | LIX | 60 min | |
| Oct 9, 1:28 PM CDT | Special Marine Warning | LIX | 32 min | |
| Oct 9, 2:00 PM CDT | Special Marine Warning | LIX | 60 min |
Nearby
Flash Flood Warnings in Louisiana, 2004Every flash flood warning in 2004
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.