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, 30 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 230 AM CDT FRI APR 30 2004 LAZ034>040-046>050-MSZ068>071-077-301130- AMITE-ASCENSION-EAST BATON ROUGE-EAST FELICIANA-IBERVILLE-LIVINGSTON- PEARL RIVER-PIKE-POINTE COUPEE-ST HELENA-ST TAMMANY-TANGIPAHOA- WALTHALL-WASHINGTON-WEST BATON ROUGE-WEST FELICIANA-WILKINSON- 230 AM CDT FRI APR 30 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL AND UPPER SOUTHEAST LOUISIANA AND EXTREME SOUTHWEST AND SOUTH CENTRAL MISSISSIPPI. .DAY ONE...REMAINDER OF TONIGHT ISOLATED SHOWERS AND A FEW THUNDERSTORMS ARE POSSIBLE FOR THE REMAINDER OF TONIGHT. SEVERE THUNDERSTORMS THOUGH ARE NOT ANTICIPATED. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY .THUNDERSTORMS...SCATTERED THUNDERSTORMS ARE EXPECTED FRIDAY THROUGH SUNDAY MORNING. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE SATURDAY AND SATURDAY NIGHT IN ADVANCE AND ALONG A COLD FRONT. .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. LAZ056>070-MSZ080>082-301130- ASSUMPTION-HANCOCK-HARRISON-JACKSON-LOWER JEFFERSON-LOWER LAFOURCHE- LOWER PLAQUEMINES-LOWER ST BERNARD-LOWER TERREBONNE-ORLEANS- ST CHARLES-ST JAMES-ST JOHN THE BAPTIST-UPPER JEFFERSON- UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST BERNARD-UPPER TERREBONNE- 230 AM CDT FRI APR 30 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR LOWER SOUTHEAST LOUISIANA AND COASTAL MISSISSIPPI. .DAY ONE...REMAINDER OF TONIGHT .THUNDERSTORMS...AREAS OF SHOWERS AND THUNDERSTORMS ARE POSSIBLE FOR THE REMAINDER OF TONIGHT. A FEW OF THESE STORMS MAY APPROACH SEVERE THRESHOLDS WITH THE POTENTIAL FOR DAMAGING WIND GUSTS...FREQUENT LIGHTNING AND HAIL. IN ADDITION...TORRENTIAL RAINFALL FROM SLOW MOVING STORMS MAY ALSO RESULT IN LOCALIZED FLOODING ALONG ROADS AND LOW LYING AREAS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY .THUNDERSTORMS...SCATTERED THUNDERSTORMS ARE EXPECTED FRIDAY THROUGH SUNDAY MORNING. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE SATURDAY AND SATURDAY NIGHT IN ADVANCE AND ALONG A COLD FRONT. .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 REQUIRED. HOWEVER...EMERGENCY MANAGEMENT AND FIRST RESPONSE SERVICES SHOULD ANTICIPATE POSSIBLE SEVERE WEATHER IMPACTS OVERNIGHT AND PROMPTLY REPORT ANY STORM DAMAGE TO THE NATIONAL WEATHER SERVICE OFFICE IN SLIDELL.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1133 PM CDT THU APR 29 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0520 PM WATER SPOUT 4 S SLIDELL 30.22N 89.78W
04/29/2004 ST. TAMMANY LA COAST GUARD
SIGHTED FROM HIGHWAY 11 BRIDGE WEST TOWARDS CAUSEWAY NEAR
NORTH SHORE...MOVING NORTH.
0445 PM HAIL 8 NE WADE 30.72N 88.47W
04/29/2004 0.25 INCH JACKSON MS EMERGENCY MNGR
TREES DOWN. FEW ROADS BLOCKED EXTREME NORTHEAST PART OF
THE COUNTY.
0420 PM HAIL PASCAGOULA 30.37N 88.55W
04/29/2004 0.25 INCH JACKSON MS PUBLIC
RELAYED REPORT FROM INGALLS SHIPYARD TO WFO MOB.
0415 PM TSTM WND DMG GULF PARK ESTATES 30.38N 88.76W
04/29/2004 JACKSON MS EMERGENCY MNGR
TREE BLOWN ONTO POWERLINES.
0405 PM HAIL 4 SE OCEAN SPRINGS 30.37N 88.75W
04/29/2004 0.50 INCH JACKSON MS NWS EMPLOYEE
VIL 62 KG/M2 AT THE TIME OF REPORT.
0355 PM HAIL 4 E OCEAN SPRINGS 30.41N 88.73W
04/29/2004 0.88 INCH JACKSON MS TRAINED SPOTTER
REPORT RELAYED VIA WFO MOBILE. ALSO 50 MPH WINDS. U.S.
HIGHWAY 90 BETWEEN GAUTIER AND OCEAN SPRINGS.
&&
RJRSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1215 AM CDT FRI APR 30 2004 LAZ060>064-300630- ORLEANS-ST CHARLES-UPPER JEFFERSON-UPPER PLAQUEMINES- UPPER ST BERNARD- 1215 AM CDT FRI APR 30 2004 ...STRONG THUNDERSTORMS APPROACHING THE NEW ORLEANS AREA... AT 1215 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS APPROACHING THE SOUTHERN HALF OF THE NEW ORLEANS METROPOLITAN AREA. THIS CLUSTER WAS MOVING TOWARD THE NORTH AROUND 20 MPH AND WILL IMPACT NEW ORLEANS THROUGH 130 AM. STRONG WIND GUSTS...LOCALLY HEAVY RAIN AND SMALL HAIL ARE POSSIBLE WITH THE STRONGER STORMS. 24
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 200 AM CDT FRI APR 30 2004 LAZ039-040-059-061>064-067>070-MSZ077-080>082-300730- HANCOCK-HARRISON-JACKSON-LOWER JEFFERSON-LOWER LAFOURCHE- LOWER PLAQUEMINES-LOWER ST BERNARD-ORLEANS-PEARL RIVER-ST TAMMANY- UPPER JEFFERSON-UPPER LAFOURCHE-UPPER PLAQUEMINES-UPPER ST BERNARD- WASHINGTON- 200 AM CDT FRI APR 30 2004 ...TORNADO WATCH EXPIRED... TORNADO WATCH 129 HAS BEEN ALLOWED TO EXPIRE. THE TORNADO THREAT THAT WAS IN EFFECT FOR THE WATCH AREA HAS WEAKENED. CLUSTERS OF THUNDERSTORMS THOUGH ARE STILL IMPACTING MUCH OF THE SOUTHEAST LOUISIANA COASTAL PARISHES. THESE STORMS ARE STILL CAPABLE OF PRODUCING STRONG GUSTY WINDS...FREQUENT LIGHTNING AND SMALL HAIL. 24
The national radar mosaic for the moment the first event began.
1 lightning. Local standard time, as filed.
Lightning struck the Ascension Parish courthouse causing damage to an air conditioner unit for the building and the electrical system supporting the parish's 911 system.
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: 5392965.