1 funnel cloud, 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 Jul 17, 1:15 AM CST, 11 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 215 AM CDT THU JUL 17 2003 SURFACE HIGH PRESSURE DOMINATED THE LOWER MISSISSIPPI VALLEY TONIGHT WITH AN UPPER-LEVEL RIDGE CENTERED OVER COLORADO. SHORTWAVES WERE ROTATING AROUND THE RIDGE ACROSS THE MISSOURI AND MISSISSIPPI VALLEYS...WITH ONE BRINGING SHOWERS AND THUNDERSTORMS TO THE MISSISSIPPI COAST. THE UPPER-LEVEL RIDGE WILL RETROGRAD SLOWLY SLOWLY INTO UTAH AND NEVADA BY EARLY NEXT WEEK AS A TROUGH AMPLIFIES OVER THE GREAT LAKES REGION. ANOTHER SHORTWAVE IS EXPECTED TO MOVE SOUTHWARD ACROSS THE LOWER MISSISSIPPI VALLEY TODAY. THIS COUPLED WITH ABUNDANT MOISTURE WILL BRING A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS THIS AFTERNOON INTO THE EARLY EVENING HOURS. SHORTWAVE INDUCED CONVECTION SHOULD BE A FACTOR FOR OUR AREA THROUGH THE WEEKEND. THE GFS IS SHOWING A SURFACE FRONT TO PUSH THROUGH THE LOWER MISSISSPPI VALLEY NEXT WEDNESDAY AND THURSDAY AS THE TROUGH OVER THE GREAT LAKES CONTINUES TO AMPLIFY. RIGHT NOW I WOULD LEAN AGAINST THE FRONT MAKING IT THAT FAR SOUTH. PRELIMINARY NUMBERS... MCB 92/72/92/72 4242 BTR 92 73 92 73 4242 MSY 92/76/92/76 4242 GPT 90/74/90/74 5242 .NEW...NONE LA...NONE. MS...NONE. 25
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-181100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1100 AM CDT THU JUL 17 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST LOUISIANA AND EXTREME SOUTHWEST AND COASTAL MISSISSIPPI. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP DURING THE AFTERNOON HOURS AND LINGER INTO THE EVENING BEFORE BECOMING MORE ISOLATED IN NATURE OVERNIGHT. IN ADDITION TO FREQUENT LIGHTNING... SOME OF THE STRONGER STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 45 MPH... SMALL HAIL AND BRIEF HEAVY RAINFALL. HEAT... AFTERNOON TEMPERATURES WILL RISE INTO THE LOWER 90S THIS AFTERNOON. THIS COMBINED WITH DEW POINTS APPROACHING THE MID 70S WILL LEAD TO HEAT INDEX VALUES RANGING FROM 100 TO 105 DEGREES. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE WILL BE A CHANCE OF THUNDERSTORMS EACH AFTERNOON AND EARLY EVENING. ORGANIZED SEVERE THUNDERSTORMS ARE NOT 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. 11
The national radar mosaic for the moment the first event began.
1 funnel cloud. Local standard time, as filed.
A funnel cloud was observed near Bayou Blue on the Terrebonne and Lafourche Parish line.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2003Every state in 2003This day in weather historyWarnings in Louisiana, July 2003
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: 5372621.