Isolated strong to severe thunderstorms developed in an unstable airmass.
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 an unstable airmass.
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 14, 3:10 PM CST, 1 hour 5 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
410 PM CDT TUE AUG 14 2007
.SHORT TERM...
REFER TO LATEST TPC/NATIONAL HURRICANE CENTER OUTLOOKS AND
ADVISORIES CONCERNING A DISTURBANCE IN THE SOUTH CENTRAL GULF OF
MEXICO AND ON TROPICAL STORM DEAN IN THE EASTERN ATLANTIC. THE
DISTURBANCE IN THE GULF HAS SHOWN BETTER ORGANIZATION TODAY...AND
RECON DATA WILL BE AVAILABLE SOON TO DETERMINE WHETHER OR NOT
THERE IS A CLOSED CIRCULATION AND TROPICAL DEPRESSION.
REGARDLESS...THIS SYSTEM IS EXPECTED TO MOVE GENERALLY WEST-
NORTHWEST TOWARDS THE SOUTH TIP OF TX/NORTHEAST MEXICO WEDNESDAY
INTO THURSDAY. FOR CENTRAL GULF COAST WEATHER...EVEN THROUGH THE
MID/UPPER RIDGE WILL REMAIN JUST TO OUR NORTH...DEEPER LOW LEVEL
SOUTHEAST TO SOUTH WINDS WILL BRING INCREASED TROPICAL MOISTURE
INTO THE AREA OVER THE NEXT COUPLE DAYS. THIS WILL GIVE SOME
RELIEF FROM THE RECORD HEAT OF THE LAST FEW DAYS...HOWEVER...
DEWPOINT TEMPERATURES WILL REMAIN QUITE HIGH WHICH WILL CAUSE HEAT
INDICES TO RISE TO 105 OR A BIT HIGHER OVER MUCH OF THE AREA ON
WEDNESDAY. HOWEVER...THE 20 TO 30 PERCENT ANTICIPATED RAIN
COVERAGE AND ASSOCIATED CLOUD COVER SHOULD LIMIT THE DURATION OF
EXCESSIVE HEAT. FOR THIS REASON... WILL HOLD OFF ON EXTENDING THE
HEAT ADVISORY INTO WEDNESDAY.
THURSDAY LOOKS SIMILAR TO WEDNESDAY. MOSTLY ISOLATED...DIURNAL
SHOWERS AND THUNDERSTORMS ARE EXPECTED AS DEEPER SOUTHERLY FLOW
CONTINUES IN THE LOW LEVELS. THERE SHOULD BE A BIT HIGHER RAIN
COVERAGE SOUTH AND WEST OF LAKE PONTCHARTRAIN. TEMPERATURES WILL
REMAIN A BIT ABOVE NORMAL.
.LONG TERM...
IT IS TOO EARLY TO SAY WHERE TROPICAL STORM DEAN WILL END UP...BUT
THERE IS A SOME CHANCE IT COULD END UP SOMEWHERE IN THE GULF OF
MEXICO. THE GOOD THING IS THE STORM IS NOT EXPECTED TO REACH NEAR
HISPANOLIA UNTIL SUNDAY...SO THERE IS A LOT OF TIME TO MONITOR
DEANS PROGRESS. FOR US...ABOVE NORMAL TEMPERATURES...ALTHOUGH NOT
RECORD BREAKING...AND BELOW NORMAL RAINFALL IS EXPECTED DURING THE
FRIDAY THROUGH TUESDAY TIME FRAME.
&&
.AVIATION...
ISOLATED SHOWERS AND THUNDERSTORMS COULD BRIEFLY IMPACT ONE OR TWO
AIRPORTS THROUGH ABOUT 23Z...OTHERWISE HAZE WILL LIMIT VSBYS TO 4
TO 5 MILES IN SOME LOCATIONS WITH LOWER SLANT VSBYS LIKELY. THERE
IS A BETTER CHANCE FOR ISOLATED TO LOCALLY SCATTERED...MAINLY
AFTERNOON SHRA/TSRA ON WEDNESDAY.
&&
.PRELIMINARY POINT TEMPS/POPS...
MCB 75 98 74 96 / 10 20 10 20
BTR 78 97 77 96 / 10 20 20 20
MSY 80 95 80 95 / 10 30 20 30
GPT 79 94 79 93 / 10 20 10 20
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR LAZ038>040-046>050-
056>070.
GM...NONE.
MS...HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR MSZ077-080>082.
GM...NONE.
&&
22HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1200 PM CDT TUE AUG 14 2007 GMZ530-550-555-570-575-LAZ034>040-046>050-056>070-MSZ068>071-077- 080>082-150000- 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- 1200 PM CDT TUE AUG 14 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF GULF OF MEXICO...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...TODAY AND TONIGHT A HEAT ADVISORY REMAINS IN EFFECT FOR AREAS OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI GENERALLY ALONG AND SOUTH OF INTERSTATES 10 AND 12. THE HEAT ADVISORY INCLUDES THE METROPOLITAN BATON ROUGE...NEW ORLEANS AND GULFPORT BILOXI AREAS. ISOLATED THUNDERSTORMS ARE EXPECTED TODAY. A STRONG OR SEVERE THUNDERSTORM WILL BE POSSIBLE. THE MAIN HAZARD WILL BE STRONG DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SCATTERED THUNDERSTORMS ARE EXPECTED OVER MUCH OF THE AREA WEDNESDAY WHICH SHOULD HELP TO EASE THE DANGEROUS HEAT WAVE. A FEW OF THE THUNDERSTORMS MAY PRODUCE FREQUENT LIGHTNING STRIKES...STRONG GUSTY WINDS...AND LOCALLY HEAVY RAINFALL. THIS WILL GREATLY DEPEND ON THE DEVELOPMENT OF A DISTURBANCE IN THE GULF. BUT WITH THE STRONG HIGH STILL IN PLACE...HOT AND HUMID CONDITIONS ARE EXPECTED TO CONTINUE THROUGH THIS WEEKEND. ONLY ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED THURSDAY THROUGH MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. 22
LAZ038-050-142230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 503 PM CDT TUE AUG 14 2007 ...STRONG THUNDERSTORM AFFECTING LIVINGSTON PARISH... A STRONG THUNDERSTORM OVER NORTHEAST LIVINGSTON PARISH WILL MOVE WEST ACROSS THE NORTHERN HALF OF THE PARISH THROUGH 545 PM. THIS THUNDERSTORM WILL PRODUCE FREQUENT LIGHTNING...A BRIEF PERIOD OF HEAVY RAIN...AND POSSIBLY WIND GUSTS TO 40 MPH AS IT AFFECT AREAS ALONG AND TO THE NORTH OF INTERSTATE 12.
The national radar mosaic for the moment the first event began.
3 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds tore off a 10 foot walkway canopy and caused other minor damage at a high school.
Thunderstorm winds tore the roof off of a barn and knocked down several trees. One of the trees fell across Louisiana Highway 10.
Numerous trees were blown down between the Maringouin and Rosedale areas.
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, August 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: 57267, 57271, 56867.