Isolated strong to severe thunderstorms developed in the vicinity of a cold front that moved through southeast Louisiana during the afternoon and evening hours.
Every event with a place to put it. 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 episode as NWS LIX wrote it up.
Isolated strong to severe thunderstorms developed in the vicinity of a cold front that moved through southeast Louisiana during the afternoon and evening hours.
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 May 16, 2:40 PM CST, 2 hours 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 340 PM CDT WED MAY 16 2007 .DISCUSSION... PREFRONTAL SHOWERS AND THUNDERSTORMS HAVE CONTINUED THEIR STEADY PUSH TO THE SOUTHEAST THIS AFTERNOON. LATEST RADAR IMAGES SHOW THE STRONGEST ACTIVITY ON THE SOUTHSHORE...WHERE SMALL HAIL...GUSTY WINDS TO 35 MILES PER HOUR...AND BRIEF HEAVY RAINFALL ARE POSSIBLE. THERE IS ANOTHER BROKEN LINE OF SHOWERS STRETCHING FROM MCCOMB TO MERIDIAN. THIS ROUGHLY CORRESPONDS TO THE LOCATION OF THE COLD FRONT. WINDS AHEAD OF THIS FRONT HAVE ALREADY COME AROUND TO THE NORTH. THE REAL DEFINING MARK OF THIS COLD FRONT IS THE DROP IN DEW POINT READINGS. LOOKING TO THE NORTH...CURRENT DEW POINTS ARE IN THE 40S AND 50S. THIS DRY COOL AIR WILL CONTINUE TO PUSH THE FRONT THROUGH THE AREA...INTO THE GULF COASTAL WATERS TOMORROW. A SMALL CRAFT ADVISORY MAY BE NEEDED TOMORROW NIGHT INTO FRIDAY MORNING FOR BRISK NORTHERLY WINDS. THIS COOL DRY HIGH PRESSURE SETTLES ACROSS THE DEEP SOUTH FOR THE REMAINDER OF THE WEEK AND WEEKEND. HIGHS WILL DROP BACK INTO THE UPPER 70S AND LOWER 80S WITH LOW RELATIVE HUMIDITIES (IN THE 30-40% RANGE). TEMPERATURES AND DEW POINTS WILL BE ON THE INCREASE EARLY NEXT WEEK AS SOUTHEASTERLY FLOW RETURNS TO THE AREA. NO RAIN IS MENTIONED IN THE EXTENDED AS THE REGION REMAINS IN THE GRIPS OF HIGH PRESSURE AT THE SURFACE AND ALOFT. && .PRELIMINARY POINT TEMPS/POPS... MCB 57 79 50 79 / 10 0 0 0 BTR 59 81 53 80 / 20 0 0 0 MSY 66 81 62 80 / 30 0 0 0 GPT 61 80 54 80 / 30 0 0 0 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. MS...NONE. GM...NONE. && 92/JSS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1036 AM CDT WED MAY 16 2007 GMZ530-550-555-570-575-LAZ034>040-046>050-056>070-MSZ068>071-077- 080>082-171130- PASCAGOULA TO SW PASS MISSISSIPPI RIVER OUT 20 NM- PASCAGOULA TO SW PASS MISSISSIPPI RIVER 20-60 NM OUT- SW PASS MISSISSIPPI RIVER TO ATCHAFALAYA RIVER OUT 20 NM- SW PASS MISSISSIPPI RIVER TO ATCHAFALAYA RIVER 20-60 NM OUT-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- 1036 AM CDT WED MAY 16 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE GULF OF MEXICO...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...THIS AFTERNOON AND TONIGHT SHOWERS AND THUNDERSTORMS ARE EXPECTED AS A COLD FRONT APPROACHES AND MOVES THROUGH THE FORECAST AREA THIS AFTERNOON AND EVENING. A FEW OF THE THUNDERSTORMS COULD BECOME SEVERE WITH LARGE HAIL... DAMAGING WINDS...AND LOCALLY HEAVY RAINFALL POSSIBLE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY A SMALL CRAFT ADVISORY FOR THE GULF COASTAL WATERS MAY BE REQUIRED THURSDAY NIGHT INTO FRIDAY MORNING FOR BRISK NORTHERLY WINDS BEHIND THE COLD FRONT. OTHERWISE...NO HAZARDOUS WEATHER IS ANTICIPATED THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. 92/JSS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 128 PM CDT WED MAY 16 2007 LAZ040-MSZ077-080-081-161930- HANCOCK-HARRISON-PEARL RIVER-ST TAMMANY- 128 PM CDT WED MAY 16 2007 ...STRONG THUNDERSTORMS MOVING ACROSS PORTIONS OF THE NORTHSHORE AND MISSISSIPPI GULF COAST... AT 130 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED NUMEROUS INTENSIFYING THUNDERSTORMS EXTENDING FROM NEAR COVINGTON TO JUST NORTH OF PICAYUNE. ANOTHER STRONG STORM WAS NEAR KILN. MOVEMENT WAS MOSTLY SOUTHEAST AROUND 15 MPH. THUNDERSTORMS WILL MOVE ACROSS MANDEVILLE...LACOMBE...SLIDELL...PEARL RIVER...PICAYUNE... DIAMONDHEAD...AND LONG BEACH THROUGH 230 PM. THE PRIMARY THREATS FROM THESE STORMS ARE SMALL HAIL...DANGEROUS CLOUD TO GROUND LIGHTNING...AND WIND GUSTS OF 35 TO 45 MPH...WHICH COULD DOWN SMALL TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED. THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A SHORT PERIOD OF TIME...RESULTING IN BRIEF PONDING OF WATER AROUND LOW LYING AREAS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING. 22
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 235 PM CDT WED MAY 16 2007 LAZ040-MSZ080-162000- HANCOCK-ST TAMMANY- 235 PM CDT WED MAY 16 2007 ...STRONG THUNDERSTORMS AND TORRENTIAL RAINFALL MOVING NEAR THE COAST FROM SOUTHEAST OF SLIDELL TO WEST OF WAVELAND... AT 230 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS EXTENDING FROM SLIDELL TO PEARLINGTON TO JUST WEST OF WAVELAND...MOVING SOUTHEAST AROUND 15 MPH. THE THUNDERSTORMS WILL AFFECT COASTAL AREAS UNTIL 245 TO 300 PM BEFORE SHIFTING OFFSHORE. THE PRIMARY THREATS FROM THESE STORMS ARE SMALL HAIL...DANGEROUS CLOUD TO GROUND LIGHTNING...AND WIND GUSTS OF 35 TO 45 MPH...WHICH COULD DOWN SMALL TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED. THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A SHORT PERIOD OF TIME...RESULTING IN BRIEF PONDING OF WATER AROUND LOW LYING AREAS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING. 22
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 318 PM CDT WED MAY 16 2007 LAZ060-061-063-068-069-162105- LOWER JEFFERSON-LOWER PLAQUEMINES-ST CHARLES-UPPER JEFFERSON- UPPER PLAQUEMINES- 318 PM CDT WED MAY 16 2007 ...STRONG THUNDERSTORMS NEAR LAKE SALVADOR...BARATARIA AND LAFITTE... AT 320 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS EXTENDING FROM NEAR LAFITTE TO LAKE SALVADOR...MOVING SOUTHEAST AT 15 TO 20 MPH. THE THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND LAFITTE AND MYRTLE GROVE THROUGH 4 PM. THE PRIMARY THREATS FROM THESE STORMS ARE SMALL HAIL...DANGEROUS CLOUD TO GROUND LIGHTNING...AND WIND GUSTS OF 35 TO 45 MPH...WHICH COULD DOWN SMALL TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED. THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A SHORT PERIOD OF TIME...RESULTING IN BRIEF PONDING OF WATER AROUND LOW LYING AREAS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING. 22
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 343 PM CDT WED MAY 16 2007 LAZ059-065-067-162105- LOWER LAFOURCHE-UPPER LAFOURCHE-UPPER TERREBONNE- 343 PM CDT WED MAY 16 2007 ...STRONG THUNDERSTORMS NEAR HOUMA AND LAROSE... AT 342 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A VERY STRONG THUNDERSTORM JUST EAST OF HOUMA...MOVING EAST AT 20 MPH. THIS STORM MAY PRODUCE WIND GUSTS TO 50 MPH ALONG WITH MARBLE SIZE HAIL THROUGH 4 PM. ANOTHER STRONG STORM WAS LOCATED JUST NORTHEAST OF LAROSE IN LAFOURCHE PARISH. THIS STORM WAS DRIFTING EAST BUT SHOULD ACCELERATE SOUTHEAST AT 15 MPH. THIS STORM MAY PRODUCE WIND GUSTS OF 35 TO 40 MPH AND PEA SIZE HAIL THROUGH 4 PM. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED. 22
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
546 PM CDT WED MAY 16 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0520 PM MARINE TSTM WIND 13 SE PONCHATOULA 30.30N 90.29W
05/16/2007 M45 MPH TANGIPAHOA LA C-MAN STATION
&&SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 558 PM CDT WED MAY 16 2007 LAZ056>058-060-061-162330- ASSUMPTION-ST CHARLES-ST JAMES-ST JOHN THE BAPTIST-UPPER JEFFERSON- 558 PM CDT WED MAY 16 2007 ...STRONG THUNDERSTORMS APPROACHING THE RIVER PARISHES... AT 556 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS...FROM THE MIDDLE OF LAKE PONTCHARTRAIN TO BAYOU SORREL...MOVING SOUTH. STRONG GUSTY WINDS OF 35 MILES AN HOUR WILL PRECEDE THE STORMS ACROSS SAINT JOHN...SAINT CHARLES AND JEFFERSON PARISHES BETWEEN 6 AND 630 PM. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED.
The national radar mosaic for the moment the first event began.
1 thunderstorm wind. Local standard time, as filed.
A roof was blown off of a house and several trees were knocked down near Highway 70 and Highway 308.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2007Every state in 2007This day in weather historyWarnings in Louisiana, May 2007
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: 30760.