Alert archive / Louisiana / Flash Flood Warnings in 2004
Flash Flood Warning 39, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Oct 10, 2004, 6:25 AM CDT for Lafourche Parish, Louisiana. It was in force for 4 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 10, 2004, 6:25 AM CDT (11:25 UTC)
- Expired
- Oct 10, 2004, 10:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS New Orleans, LA
- Area
- Counties, with a storm outline in the text
County Lafourche 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 00:00Z, 11.4 hours before the alert went out and 102 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
- 330 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 521 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KLIX 101128 FFWNEW LAC057-101530- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 625 AM CDT SUN OCT 10 2004 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A * FLASH FLOOD WARNING FOR... LAFOURCHE PARISH IN SOUTHEAST LOUISIANA THIS INCLUDES THE CITY OF LAROSE * UNTIL 1030 AM CDT * AT 620 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM NEAR LAROSE...OR ABOUT OVER LAROSE...MOVING NORTH AT 25 MPH. * THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED PARISH. ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE IN THE WARNED AREA. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. 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. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN NEW ORLEANS. LAT...LON 2950 9047 2950 9037 2969 9031 2971 9049 $$
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 10, 3:56 AM CDT, 2 hours 29 minutes earlier.
Area forecast discussion, Oct 10, 3:56 AM CDT, 2 hours 29 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 345 AM SUN OCT 10 2004 .DISCUSSION NOT MUCH CHANGE TO THE FORECAST PACKAGE THIS MORNING. TROPICAL STORM MATTHEW CONTINUES TO PULL NORTHWARD TOWARD THE LOUISIANA COASTLINE. THIS TREND WILL CONTINUE THIS MORNING...WITH THE SYSTEM MOVING THROUGH SOUTHEAST LOUISIANA AND SOUTHWEST MISSISSIPPI DURING THE DAY. THE STORM WILL REMAIN POORLY ORGANIZED AS DEEP SOUTHWESTERLY SHEAR ASSOCIATED WITH AN UPPER LEVEL LOW IN WEST TEXAS REMAINS OVER THE SYSTEM. THE HEAVIEST RAINS WILL REMAIN WELL EAST OF THE CENTER OF CIRCULATION. KEPT POPS UP OVER COASTAL MISSISSIPPI COUNTIES AS A RESULT. HOWEVER...DO NOT EXPECT WIDESPREAD HEAVY RAINFALL TODAY IN OUR REGION. TONIGHT...EXPECT POPS TO DROP SHARPLY...AS A DRY SLOT WRAPS AROUND THE STORM. MID AND UPPER LEVELS WILL DRY SIGNIFICANTLY...BUT BOUNDARY LAYER WILL REMAIN MOIST. EXPECT LOW STRATUS DECK TO REMAIN IN PLACE THROUGH THE NIGHT. THE UPPER LOW OVER TEXAS WILL BEGIN TO LIFT OUT TOMORROW AND TOMORROW NIGHT...PUSHING THE REMAINS OF MATTHEW NORTH INTO THE MID MISSISSIPPI VALLEY. EXPECT CONDITIONS TO DRY OUT AND CLOUD COVER TO DIMINISH RAPIDLY TOMORROW. HOWEVER...A JET STREAK LOOKS TO PASS OVER CENTRAL MISSISSIPPI TUESDAY NIGHT. A FEW MORE CLOUDS COULD DEVELOP OVER OUR NORTHERN CWA AS A RESULT. HOWEVER...DO NOT EXPECT ANY PRECIP TO DEVELOP. MIDWEEK LOOKS STABLE...AS STRONG SUBSIDENCE IN WAKE OF LOW INFLUENCES REGION. GOING INTO THE EXTENDED PERIOD...ECMWF...UKMET...AND GFS ARE ALL IN GOOD AGREEMENT WITH A MAJOR COOL DOWN FOR THE AREA. LOOKS LIKE A STRONG HUDSON BAY LOW PRESSURE SYSTEM WILL DEVELOP THIS WEEKEND. AS THE LOW DEEPENS...A STRONG COLD FRONT WILL SWEEP DOWN FROM THE PLAINS OF CANADA THROUGH OUR REGION LATE WEDNESDAY INTO EARLY THURSDAY. IT APPEARS THIS FRONT WILL BE MOISTURE STARVED...AS RETURN FLOW WILL HAVE LITTLE TIME TO REESTABLISH. EXPECT LIMITED POPS WITH THE FRONT AS IT MOVES THROUGH. GOING INTO THE WEEKEND...ANOTHER REINFORCING SHOT OF COOL AIR IS EXPECTED...AS A LOW PRESSURE SYSTEM AND FRONT DIVES INTO THE REGION FROM THE NORTHEAST ROCKIES...ON THE BACK SIDE OF A DEEP UPPER LEVEL TROUGH. GOING INTO THE MIDDLE OF NEXT WEEK...A HINT AT A MORE ZONAL FLOW DEVELOPS...AS THE RIDGE IN THE WEST DEAMPLIFIES. && .PRELIMINARY POINT TEMP/POPS... MCB 71 64 79 62 / 80 30 10 10 BTR 75 67 82 64 / 70 20 00 00 MSY 76 69 84 67 / 70 20 00 00 GPT 75 68 83 65 / 80 40 10 00 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...TROPICAL STORM WARNING IN EFFECT FOR LAZ038-040- 050-056>070. FLOOD WATCH IN EFFECT FOR FOLLOWING SE LA PARISHES...LAZ038>040-050-056>070. MS...TROPICAL STORM WARNING IN EFFECT MSZ080>082. FLOOD WATCH IN EFFECT FOR FOLLOWING MS COUNTIES...MSZ070-071 -077-080>082. SE LA AND MS COASTAL WATERS...TROPICAL STORM WARNING IN EFFECT FROM PASCAGOULA TO ATCHAFALAYA RIVER INCLUDING LAKES MAUREPAS AND PONTCHARTRAIN. && 32
Hazardous weather outlook, Oct 9, 11:16 PM CDT, 7 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1116 PM CDT SAT OCT 9 2004 LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-101030- 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- 1116 PM CDT SAT OCT 9 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND SOUTHEAST LOUISIANA AND EXTREME SOUTHWEST...SOUTH CENTRAL AND COASTAL MISSISSIPPI. ...A TROPICAL STORM WARNING IS IN EFFECT FOR THE MISSISSIPPI COAST AND THE ENTIRE SOUTHEAST LOUISIANA COAST TO INTRACOASTAL CITY INCLUDING THE TIDAL LAKES... ...A FLOOD WATCH IS IN EFFECT FOR ALL PARISHES AND COUNTIES EAST OF A LINE FROM SUMMIT MISSISSIPPI TO MORGAN CITY LOUISIANA... .DAY ONE...TONIGHT TROPICAL WEATHER... REFER TO THE LATEST LOCAL ACTION STATEMENTS REGARDING TROPICAL STORM MATTHEW FOR INFORMATION PERTAINING TO YOUR PARISH OR COUNTY. HEAVY RAINS AND FLOODING... THERE REMAINS A THREAT OF PERSISTENT MODERATE TO HEAVY RAINS OVERSPREADING THE OUTLOOK AREA WITH THE APPROACH AND LANDFALL OF TROPICAL STORM MATTHEW SUNDAY MORNING. AN ADDITIONAL 2 TO 4 INCHES OF RAINFALL IS LIKELY THROUGH SUNDAY WITH SOME LOCALLY HIGHER AMOUNTS MAINLY NEAR THE COAST. SEVERE THUNDERSTORMS... AN ISOLATED SEVERE THUNDERSTORM IS POSSIBLE TONIGHT...MAINLY NEAR THE SOUTHEAST LOUISIANA COAST. 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 IN TROPICAL SQUALLS. MARINE... SMALL CRAFT REMAIN IN PORT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. TROPICAL... THE AFFECTS FROM TROPICAL STORM MATTHEW WILL GRADUALLY DIMINISH THROUGHOUT THE DAY SUNDAY. TIDES WILL REMAIN HIGH THROUGH MUCH OF SUNDAY BEFORE RECEDING LATE SUNDAY EVENING...PARTICULARLY IN THE TIDAL LAKES. MARINE... SMALL CRAFT SHOULD REMAIN IN PORT SUNDAY UNTIL WINDS AND SEAS SUBSIDE. .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. 24
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 4:50 AM CDT | Tornado Warning | LIX | Lafourche | 25 min |
| Oct 10, 5:19 AM CDT | Tornado Warning | LIX | Lafourche, Terrebonne | 26 min |
| Oct 10, 5:43 AM CDT | Tornado Warning | LIX | Lafourche | 32 min |
| Oct 10, 6:14 AM CDT | Tornado Warning | LIX | Jefferson, Lafourche, Saint Charles | 31 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.