1 lightning, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, 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 the first event at Apr 30, 3:30 AM CST, 5 hours 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 430 AM CDT FRI APR 30 2004 .DISCUSSION... MAIN FORECAST CONCERN CENTERS AROUND CONVECTIVE TRENDS THROUGH THE WEEKEND. PERSISTENT AREA OF CONVECTION OVERNIGHT ACROSS AREAS MAINLY TO THE SOUTH OF LAKE PONTCHARTRAIN NOW BEGINNING TO INCREASE IN AREAL COVERAGE WITH ADDITIONAL CONVECTION DEVELOPING ACROSS THE COASTAL WATERS JUST TO THE SOUTHWEST OF THE FORECAST AREA. THIS INCREASE IN CONVECTION APPEARS TO BE IN RESPONSE TO APPROACHING WEAK SHORT WAVE MOVING OFF THE TEXAS COAST AND INCREASING UPPER LEVEL DIFFLUENCE OVER THE AREA EVIDENT IN SATELLITE IMAGERY. WE EXPECT CONVECTION COVERAGE INCREASE DURING THE MORNING HOURS AS THIS SHORT WAVE MOVES ACROSS THE AREA WITH A SHORTWAVE TROUGH NOW MOVING ACROSS CENTRAL TEXAS APPROACHING THE AREA DURING THE AFTERNOON. AS A RESULT...MORE THAN ONE ROUND OF CONVECTION EXPECTED TODAY AND PLAN TO INDICATE LIKELY POPS ACROSS THE FORECAST REGION. SO FAR MOST OF THE HEAVIER RAIN OVERNIGHT HAS OCCURRED ACROSS MARSH AREAS...HOWEVER LOCALLY HEAVY RAINFALL AMOUNTS WILL BE POSSIBLE DURING THE DAY ACROSS THE FORECAST AREA SIMILAR TO YESTERDAY. MODELS FORECAST THE CONVECTION TO PUSH EAST AND DIMINISH OVERNIGHT...THEREFORE SCATTERED CONVECTION LOOKS GOOD FOR THE SECOND FORECAST PERIOD. ON SATURDAY... THE SOUTHERN STREAM UPPER LOW/TROUGH MOVING ACROSS THE CENTRAL/SOUTHERN ROCKIES AND SOUTHWEST CONUS TODAY WILL PUSH INTO THE SOUTHERN PLAINS AND BEGIN TO PHASE WITH A NORTHERN STREAM TROUGH. THE ETA SOLUTION IS MORE DISTINCT WITH THE SOUTHERN STREAM SYSTEM THAN THAT OF THE GFS AND IS SLOWER IN MOVING THE ASSOCIATED COLD FRONT ACROSS THE AREA. WE PLAN TO CONTINUE TO PUSH THE COLD FRONT ACROSS THE FORECAST AREA SATURDAY NIGHT AND EARLY SUNDAY. CONVECTION WILL AGAIN BE ON THE INCREASE DURING THE DAY SATURDAY AND CONTINUE THROUGH SATURDAY NIGHT BEFORE GRADUALLY DIMINISHING DURING THE DAY SUNDAY. WE WILL DISCOUNT THE RATHER STRONG WAVE THAT THE GFS FORECASTS TO DEVELOP ALONG THE FRONT SUNDAY OVER THE GULF. RIGHT REAR QUADRANT OF UPPER JET SHOULD ENHANCE CONVECTION LATE SATURDAY. CANNOT RULE OUT ISOLATED SEVERE STORMS TODAY...BUT A BETTER CHANCE FOR SEVERE WEATHER WILL OCCUR LATE SATURDAY AND SATURDAY NIGHT. WE BELIEVE THE MAIN THREAT FORM THE THUNDERSTORMS TODAY IS LIKELY TO BE LOCALLY HEAVY RAINFALL. DRY CONDITIONS SHOULD PREVAIL THROUGH MUCH OF THE NEXT WORK WEEK WITH AN UPPER RIDGE BUILDING OVER THE AREA DURING MIDDLE AND LATTER PART OF THE PERIOD. && .PRELIMINARY POINT TEMP/POPS... MCB 80 66 81 59 / 60 30 60 60 BTR 82 67 82 60 / 60 30 60 60 MSY 80 68 83 65 / 60 30 50 60 GPT 79 68 80 66 / 60 40 50 60 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. MS...NONE. SE LA AND MS COASTAL WATERS...NONE. && 11
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 600 AM CDT FRI APR 30 2004 GMZ530-LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-301600- AMITE-ASCENSION-ASSUMPTION-EAST BATON ROUGE-EAST FELICIANA-HANCOCK- HARRISON-IBERVILLE-JACKSON-LAKES PONTCHARTRAIN AND MAUREPAS- 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 APR 30 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND SOUTHEAST LOUISIANA AND EXTREME SOUTHWEST AND SOUTH CENTRAL MISSISSIPPI. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TODAY AND AND THIS EVENING BEFORE DIMINISHING OVERNIGHT. THE MAIN THREAT FROM THE THUNDERSTORMS WILL BE LOCALLY HEAVY RAINFALL. IN ADDITION TO THE HEAVY RAINFALL THREAT...THE STRONGER THUNDERSTORMS WILL BE CAPABLE OF PRODUCING FREQUENT LIGHTNING...GUSTY WINDS...AND SMALL HAIL. ISOLATED SEVERE THUNDERSTORMS ARE ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THUNDERSTORMS... SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED SATURDAY AND SUNDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS AND LARGE HAIL SATURDAY AFTERNOON AND SATURDAY NIGHT. MARINE... SMALL CRAFT ADVISORY CONDITIONS ARE EXPECTED TO DEVELOP SUNDAY AND CONTINUE MONDAY AS OFFSHORE FLOW INCREASES IN THE WAKE OF A COLD FRONT. .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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
721 AM CDT FRI APR 30 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0630 AM FLASH FLOOD LAROSE 29.57N 90.37W
04/30/2004 LAFOURCHE LA LAW ENFORCEMENT
A FEW APARTMENT BUILDINGS WERE FLOODED.
&&
MTSThe national radar mosaic for the moment the first event began.
1 lightning. Local standard time, as filed.
A lightning strike started a fire in the the attic of a house.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2004Every state in 2004This day in weather historyWarnings in Louisiana, April 2004
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5392963.