Isolated strong to severe pulse type thunderstorms dveloped in an unstable atmosphere in the vicinity of a weak frontal boundary stalled across the area.
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 pulse type thunderstorms dveloped in an unstable atmosphere in the vicinity of a weak frontal boundary stalled across the area.
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 11, 2:12 PM CST, 11 hours 43 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 312 PM CDT WED JUL 11 2007 .SHORT TERM... A VERY DYNAMIC PATTERN WILL CONTINUE ACROSS THE EASTERN TWO THIRDS OF THE NATION THROUGH THE SHORT TERM...AS A DEEP TROUGH OF LOW PRESSURE OVER THE HUDSON BAY CONTINUES TO TAKE ON A NEGATIVE TILT IN RESPONSE TO A JET STREAK DIVING DOWN THE CANADIAN PLAINS. A COLD FRONT RACING THROUGH THE SOUTHEAST WILL STALL OVER THE CWA TONIGHT. HOWEVER...STRONG NEGATIVE VORTICITY ADVECTION IN THE WAKE OF THE UPPER LEVEL TROUGH AXIS WILL LIMIT ANY CONVECTIVE DEVELOPMENT OVERNIGHT INTO TOMORROW MORNING. LOW LEVEL MOISTURE WILL REMAIN HIGH...SO TEMPERATURES ARE NOT EXPECTED TO FALL MUCH BEHIND THE FRONT. IN FACT...THE MAIN EFFECT FROM THE FRONT WILL BE A DRYING OF THE MID AND UPPER LEVEL LAYERS. GOING INTO TOMORROW...STRONG SUBSIDENCE ALOFT AND THE WEAK FRONTAL BOUNDARY OVER THE REGION WILL WORK AGAINST EACH OTHER...THUS LIMITING OVERALL CONVECTION. HAVE DECIDED TO GO WITH ISOLATED TO LOW END CHANCE POPS ACROSS THE CWA AS RESULT. THE DRIER AIRMASS ALOFT COMBINED WITH STRONG SUBSIDENCE...AND MORE SOLAR HEATING WILL ALLOW TEMPERATURES TO CLIMB INTO THE MIDDLE TO UPPER 90S ACROSS THE REGION TOMORROW. THIS TREND WILL CONTINUE INTO FRIDAY AS A DRY UPPER LEVEL AIRMASS REMAINS IN PLACE. WITH DEWPOINTS REMAINING IN THE LOWER TO MIDDLE 70S...HEAT INDICES SHOULD RISE INTO THE 105-110 RANGE TOMORROW AFTERNOON. HOWEVER...ADDITIONAL CLOUD COVER ON FRIDAY WILL ALLOW HEAT INDICES TO FALL BACK TO AROUND 100. WITH THIS IN MIND...HAVE HELD ON ISSUING ANY TYPE OF HEAT ADVISORY FOR THE REGION. .LONG TERM... BY FRIDAY NIGHT...THE FULL FORCE A DEEP COLD POOL AND STRONG COLD FRONT SWINGING DOWN FROM THE NORTHERN PLAINS ON THE BACK SIDE OF THE DEEP TROUGH OVER THE EASTERN PORTION OF CANADA AND THE GREAT LAKES WILL BEGIN TO BE FELT IN THE CWA. AT THIS TIME...IT APPEARS THAT A STRONG MESOSCALE CONVECTIVE SYSTEM MAY FROM OVER OKLAHOMA AND ARKANSAS AND RACE SOUTHWARD INTO THE LOWER MISSISSIPPI VALLEY AS IT FOLLOWS THE 850 WINDS AND THETA E AXIS. IF THIS HAPPENS...THERE COULD BE SOME SEVERE WEATHER TOWARD DAYBREAK ON SATURDAY. THIS SITUATION WILL HAVE TO BE MONITORED. IN ANY EVENT...THE MAIN FRONT WILL SWEEP THROUGH THE CWA SATURDAY AFTERNOON INTO SATURDAY EVENING...WHICH SHOULD SET OFF ANOTHER LINE OF STRONG TO SEVERE THUNDERSTORMS. IT APPEARS THAT STRONG WINDS AND HAIL WILL BE THE MAIN THREAT FROM THESE THUNDERSTORMS BASED OFF MODEL SOUNDINGS. UNFORTUNATELY...IT ALSO APPEARS THAT JUST AS THE FRONT GETS INTO OUR FORECAST AREA...IT WILL BEGIN TO LOSE ANY DYNAMIC FORCING AS THE UPPER LEVEL TROUGH AXIS PULLS NORTHEASTWARD. THUS...THE FRONT WILL SLAM INTO THE DEEP RIDGE AXIS OVER THE GULF AND FLORIDA AND STALL ON TOP OF OUR AREA ON SUNDAY. SOUTHERLY FLOW WILL REDEVELOP ACROSS THE AREA AS THE UPPER LEVEL RIDGE IN THE WESTERN ATLANTIC PUSHES WESTWARD...WHICH WILL INTERACT WITH THE FRONTAL BOUNDARY IN PLACE. AS A RESULT...PERIODS OF SHOWERS AND THUNDERSTORMS ARE EXPECTED SUNDAY INTO MONDAY. ON TOP OF THIS...DEEP TROPICAL MOISTURE SHOULD ALSO OVERSPREAD THE REGION MONDAY INTO TUESDAY...AS A WEAK TROPICAL WAVE MOVES UP FROM THE YUCATAN. THIS DEEP TROPICAL MOISTURE...COMBINED WITH THE SURFACE BOUNDARY SHOULD ALLOW FOR SOME VERY HEAVY RAINFALL OVER THE CWA MONDAY THROUGH WEDNESDAY. IN FACT...FLOODING MAY BE A CONCERN BY THE MIDDLE OF NEXT WEEK GIVEN THE PATTERN EXPECTED. && .PRELIMINARY POINT TEMPS/POPS... MCB 74 95 73 94 / 10 30 20 30 BTR 76 96 75 96 / 10 30 20 30 MSY 77 94 77 95 / 10 20 20 30 GPT 75 95 75 95 / 10 20 20 30 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. GM...NONE. MS...NONE. GM...NONE. && 32
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 951 PM CDT WED JUL 11 2007 GMZ530-550-555-570-575-LAZ034>040-046>050-056>070-MSZ068>071-077- 080>082-130300- LAKE PONTCHARTRAIN AND LAKE MAUREPAS- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER ATCHAFALAYA RIVER LA OUT 20 NM- COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO LOWER ATCHAFALAYA RIVER LA FROM 20 TO 60 NM- COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA- EAST FELICIANA-ST. HELENA-TANGIPAHOA-WASHINGTON-ST. TAMMANY- IBERVILLE-WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON- ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST-UPPER LAFOURCHE- ST. CHARLES-UPPER JEFFERSON-ORLEANS-UPPER PLAQUEMINES- UPPER ST. BERNARD-UPPER TERREBONNE-LOWER TERREBONNE- LOWER LAFOURCHE-LOWER JEFFERSON-LOWER PLAQUEMINES- LOWER ST. BERNARD-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER- HANCOCK-HARRISON-JACKSON- 951 PM CDT WED JUL 11 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF GULF OF MEXICO...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY HEAT INDICES WILL BE NEAR 105 DEGREES ON THURSDAY...MAINLY ALONG AND TO THE WEST OF INTERSTATE 55...INCLUDING THE NEW ORLEANS...BATON ROUGE AND MCCOMB AREAS. AFTERNOON THUNDERSTORMS ARE POSSIBLE EACH DAY. SOME OF THESE STORMS COULD BE STRONG ON THURSDAY AND FRIDAY...WITH A FEW SEVERE STORMS POSSIBLE. AN UNSETTLED PATTERN IS EXPECTED THIS WEEKEND INTO EARLY NEXT WEEK AS A STRONG COLD FRONT PULLS INTO THE AREA. THE FRONT IS EXPECTED TO STALL ALONG THE CENTRAL GULF COAST SATURDAY OR SUNDAY...AND REMAIN ALONG THE COAST THROUGH TUESDAY. THIS WILL CONTINUE THE THREAT OF THUNDERSTORMS...WITH ENHANCED CHANCES FOR HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED OVERNIGHT...BUT CANNOT BE RULED OUT FOR THURSDAY AND FRIDAY.
The national radar mosaic for the moment the first event began.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
Several trees were blown down along Highway 26.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2007Every state in 2007This day in weather historyWarnings in Mississippi, July 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: 49655, 49683.