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 Aug 21, 3:08 PM CST, 22 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 408 PM CDT SUN AUG 21 2005 .DISCUSSION... COMBINATION OF VERY HIGH PRECIPITABLE WATER...MINOR DISTURBANCE MOVING IN FROM THE NORTHEAST...A GENERAL WEAKNESS BETWEEN TWO RIDGES...AND VERY HOT AND HUMID SURFACE TEMPERATURES RESULTED IN NUMEROUS STRONG TO MARGINALLY SEVERE THUNDERSTORMS TODAY. TORRENTIAL RAINFALL AMOUNTS OF 2 TO 3 INCHES PER HOUR... CONTINUOUS LIGHTNING...AND WIND GUSTS NEAR 45 MPH HAVE BEEN REPORTED IN BATON ROUGE AND HAVE LIKELY OCCURRED ACROSS WESTERN PORTIONS OF THE NORTH SHORE OF LAKE PONTCHARTRAIN...THE RIVER PARISHES...AND DOWN AR0UND TERREBONNE AND LAFOURCHE PARISHES. A FEW MORE STRONG STORMS ARE LIKELY TO SPREAD SOUTH AND WEST THE REMAINDER OF THIS AFTERNOON...POSSIBLY AFFECTING PORTIONS OF METRO NEW ORLEANS. TONIGHT...LINGERING SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS EVENING BEFORE DIMINISHING TO ISOLATED COVERAGE OVERNIGHT EXCEPT NEAR THE COAST AND IN THE COASTAL WATERS WHERE THE TYPICAL LATE NIGHT FLARE UP IS EXPECTED. THERE SHOULD BE A SLIGHT SOUTH SHIFT OF THE OVERALL PATTERN ON MONDAY...OTHERWISE I EXPECT A REPEAT OF TODAY/S WEATHER ON MONDAY. HAVE GONE WITH LIKELY POPS SOUTH AND GOOD CHANCE NORTH. TEMPERATURES WILL BE QUITE HOT SO ADDITIONAL STRONG THUNDERSTORMS ARE EXPECTED. THE PATTERN STILL REMAINS LARGELY UNCHANGED ON TUESDAY AS THE WEAK COLD FRONT THAT WAS EARLIER FORECAST TO GET DOWN INTO OUR AREA NOW LOOKS LIKE IT WILL STALL OUT NORTH OF THE FORECAST AREA. WILL KEEP 50 PERCENT POPS FOR CONVECTION TUESDAY. STILL NOT MUCH CHANGE IS FORECAST WEDNESDAY THROUGH SUNDAY AS THE AREA WILL REMAIN ALONG THE SOUTHERN FLANK OF THE MID/UPPER HIGH WHICH WILL LIKELY CONTINUE TO HAVE WEAKNESSES AND MINOR DISTURBANCES MOVING THROUGH OR STALLING OUT IN OUR AREA. WILL CONTINUE DAILY CHANCES OF SHOWERS AND THUNDERSTORMS AND LOWER TEMPERATURES SLIGHTLY DUE TO A WEAKENING OF THE UPPER RIDGE. && .PRELIMINARY POINT TEMPS/POPS... MCB 75 93 75 93 / 40 50 30 50 BTR 76 94 76 95 / 40 50 30 50 MSY 79 94 79 93 / 40 60 30 50 GPT 76 93 77 92 / 40 60 30 50 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. GM...NONE. MS...NONE. GM...NONE. && 22
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 600 AM CDT SUN AUG 21 2005 LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-211600- 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 SUN AUG 21 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 SCATTERED THUNDERSTORMS WILL OCCUR TODAY AND TONIGHT. WEAK DISTURBANCES MOVING FROM THE NORTHEAST WILL COUPLE WITH DAYTIME HEATING TODAY CAUSING A FEW THUNDERSTORMS TO BECOME STRONG WITH AN ISOLATED SEVERE THUNDERSTORM POSSIBLE. THE FIRST DISTURBANCE IS PASSING THIS MORNING WHILE ANOTHER IS BEGINNING TO MOVE DOWN BEHIND THIS ONE JUST TO THE NORTHEAST OF THE AREA. SEVERE THUNDERSTORM MAIN HAZARDS WILL CONSIST OF DAMAGING WIND GUSTS...VERY HEAVY RAINFALL...CONTINUOUS LIGHTNING AND LARGE HAIL. CONDITIONS ARE ALSO CONDUCIVE FOR A STRONG OR SEVERE THUNDERSTORM TO FORM OVERNIGHT. ALTHOUGH HOT AND HUMID CONDITIONS ARE EXPECTED AGAIN TODAY...CLOUD COVER WILL BRING RELIEF TO MUCH OF THE AREA AS THUNDERSTORMS DEVELOP. HEAT INDEX READINGS WILL STILL RUN AROUND 105 DEGREES DURING THE HOTTEST PORTION OF THE DAY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HOT AND HUMID CONDITIONS WILL CONTINUE MONDAY AS AFTERNOON HEAT INDEX READINGS INCEASE TO THE 105 TO 110 DEGREE RANGE AND OVERNIGHT LOW TEMPERATURES ONLY DROP INTO THE 75 TO 80 DEGREE RANGE. THE ONLY BREAK IN THE HEAT WILL COME FROM SCATTERED AFTERNOON SHOWERS AND THUNDERSTORMS. THE MAIN THREATS FROM STRONGER THUNDERSTORMS WILL BE FREQUENT LIGHTNING...GUSTY WINDS...AND LOCALLY HEAVY RAINFALL. A COLD FRONT IS EXPECTED TO MOVE NEAR THE COAST LATE MONDAY OR TUESDAY PROVIDING A CONTINUED CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH MUCH OF THE WEEK. .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. 17
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1237 PM CDT SUN AUG 21 2005 LAZ038-211837- TANGIPAHOA- 1237 PM CDT SUN AUG 21 2005 ...STRONG THUNDERSTORM OVER SOUTH TANGIPAHOA PARISH... AT 1235 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM JUST SOUTHEAST OF PONCHATOULA... MOVING TO THE WEST AT 5 TO 10 MPH. THIS THUNDERSTORM WILL AFFECT MANCHAC BETWEEN 1 AND 2 PM CDT. THIS THUNDERSTORM IS CAPABLE OF PRODUCING FREQUENT LIGHTNING STRIKES...WINDS GUSTING TO 35 MPH...PEA SIZE HAIL AND HEAVY RAINFALL OF UP TO AN INCH. 18
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 126 PM CDT SUN AUG 21 2005 LAZ038-211924- TANGIPAHOA- 126 PM CDT SUN AUG 21 2005 ...STRONG THUNDERSTORMS OVER TANGIPAHOA PARISH... AT 121 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS MAINLY ALONG AND EAST OF INTERSTATE 55...MOVING TO THE WEST AT 5 TO 10 MPH. THESE THUNDERSTORMS WILL AFFECT INDEPENDENCE...TICKFAW...HAMMOND AND PONCHATOULA THROUGH 2 PM CDT. THESE STORMS ARE CAPABLE OF PRODUCING FREQUENT LIGHTNING STRIKES...WINDS GUSTING TO 45 MPH...PEA SIZE HAIL AND HEAVY RAINFALL OF UP TO TWO INCHES. 18
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 135 PM CDT SUN AUG 21 2005 LAZ050-211922- LIVINGSTON- 135 PM CDT SUN AUG 21 2005 ...STRONG THUNDERSTORMS JUST EAST OF KILLIAN... AT 136 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM JUST EAST OF KILLIAN...MOVING TO THE WEST AT 5 TO 10 MPH. THIS THUNDERSTORM WILL AFFECT KILLIAN AND NORTHERN PORTIONS OF LAKE BORGNE THROUGH 215 PM CDT. THIS STORM IS CAPABLE OF PRODUCING FREQUENT LIGHTNING STRIKES...WINDS GUSTING TO 35 MPH...PEA SIZE HAIL AND HEAVY RAINFALL OF UP TO ONE INCHES. 18
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 138 PM CDT SUN AUG 21 2005 LAZ050-211922- LIVINGSTON- 138 PM CDT SUN AUG 21 2005 ...STRONG THUNDERSTORMS JUST EAST OF KILLIAN... AT 136 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM JUST EAST OF KILLIAN...MOVING TO THE WEST AT 5 TO 10 MPH. THIS THUNDERSTORM WILL AFFECT KILLIAN AND NORTHERN PORTIONS OF LAKE BORGNE THROUGH 215 PM CDT. THIS STORM IS CAPABLE OF PRODUCING FREQUENT LIGHTNING STRIKES...WINDS GUSTING TO 35 MPH...PEA SIZE HAIL AND HEAVY RAINFALL OF UP TO ONE INCHES. 18
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 313 PM CDT SUN AUG 21 2005 LAZ047-048-212107- EAST BATON ROUGE-WEST BATON ROUGE- 313 PM CDT SUN AUG 21 2005 ...STRONG THUNDERSTORMS MOVING ACROSS THE BATON ROUGE METRO AREA... AT 312 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A BAND OF STRONG THUNDERSTORMS FROM SLAUGHTER TO BATON ROUGE TO BRUSLY...MOVING TO THE WEST AT 10 TO 15 MPH. THESE THUNDERSTORM WILL AFFECT THE BATON ROUGE METRO AREA THROUGH 4 PM CDT. THESE STORMS ARE CAPABLE OF PRODUCING FREQUENT LIGHTNING STRIKES...WINDS GUSTING TO 40 MPH...PEA SIZE HAIL AND HEAVY RAINFALL OF UP TO TWO INCHES. 18
The national radar mosaic for the moment the first event began.
1 lightning. Local standard time, as filed.
Lightning struck a house causing a fire in the attic.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2005Every state in 2005This day in weather historyWarnings in Louisiana, August 2005
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: 5475545.