Scattered thunderstorms produced a waterspout that moved onshore near Gulfport.
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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.
Scattered thunderstorms produced a waterspout that moved onshore near Gulfport.
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 Sep 19, 2:56 AM CST, 8 hours 51 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 356 AM CDT MON SEP 19 2011 .SYNOPSIS...A WEAK COLD FRONT IS CURRENTLY DRAPED JUST ACROSS THE MID MS VALLEY AND JUST WEST OF THE LOWER MS VALLEY. A SQUALLLINE HAS PUSHED OUT AHEAD OF THE FRONT MOSTLY TO THE SSW MOVING ACROSS ERN TX AND NWRN/WCNTRL LA. IN THE MID LVLS A DEVELOPING L/W TROUGH IS LOCATED ACROSS THE ENTIRE MS VALLEY STRETCHING SOUTH FROM CNTRL CANADA INTO THE WRN GULF. RIDGE IS LOCATED OVER THE DESERT SW WITH AN UPPER LOW MOVING OFF THE NE COAST. && .SHORT TERM...BIGGEST ISSUE IN THE SHORT TERM IS WHAT HAPPENS WITH THE CURRENT SQUALLINE/OUTFLOW BNDRY OFF TO OUR NW. CONVECTION HAS BEEN DYING QUITE QUICKLY THE FURTHER EAST THE SQUALLINE HAS PUSHED WHILE IT HAS HAD A GREATER PUSH SOUTH INTO SERN TX. THIS MAKES SINCE AS IT IS FOLLOWING THE H85 THETA E AXIS WHICH IS LOCATED WEST OF IAH. THAT SAID THERE IS RATHER DEEP MOISTURE OVER THE REGION AND WITH A WEAK IMPULSE MOVING ACROSS THE REGION NOTED ON WV WE HAVE SEEN WIDELY SCT CONVECTION BREAK OUT ACROSS BASICALLY THE WRN HALF OF THE CWA WELL AHEAD OF THE OUTFLOW BNDRY ALREADY. THIS WILL LIKELY BE THE CASE THROUGH THE NEXT 3-4 HRS. TODAY THROUGH THU...THE L/W TROUGH WILL BE OVER THE REGION WITH NUMEROUS IMPULSES MOVING ACROSS THE REGION THROUGH AT LEAST THE NEXT 84-96 HRS. TODAY THE OUTFLOW BNDRY FROM THE CURRENT DYING SQUALLINE WILL PUSH INTO THE REGION LATER THIS MORNING. IT ALONG WITH ANOTHER IMPULSE CURRENTLY BACK IN SCNTRL/CNTRL TX WILL PUSH ACROSS THE CWA AROUND MIDDAY/EARLY AFTN AND SOME DAY TIME HEATING WILL BE MORE THAN SUFFICIENT TO GET CONVECTION TO CONTINUE/REFIRE. PWS OF 1.75 TO 2 INCHES(ABOUT 140-150% OF NORMAL) SHOULD LEAD TO NUMEROUS SHRA/TSRA IF NOT WIDESPREAD ACTIVITY ACROSS NRN PORTIONS OF THE CWA. AGAIN SCT CONVECTION WILL ALREADY BE ONGOING THIS MORNING AND LIKELY LAST THROUGH MUCH OF THE MORNING ALTHOUGH I CANT RULE OUT A TEMPORARY BREAK IN CONVECTION. LOOK FOR CONVECTION TO ONCE AGAIN DECREASE THIS EVN AS WE LOSE BOTH DAY TIME HEATING AND AS THE IMPULSE PULLS AWAY. THE L/W TROUGH WILL BE REINFORCED TOMORROW AS ANOTHER YET MUCH STRONGER S/W DIGS SE OUT OF THE PAC NW INTO THE UPPER MS VALLEY. IN FACT AS THE SYSTEM REINFORCES THE L/W...TOMORROW MIGHT BE THE DAY WITH THE LOWEST CHANCE OF RAIN OVER THE NEXT FOUR DAYS. AS FOR STRONG/SVR...CANT RULE OUT A STRONG STORM OR TWO TODAY BUT WE ARE JUST GOING TO LACK THE SUFFICIENT INSTABILITY AND MID LVL FLOW TO REALLY GET A POTENT UPDRAFT TO SUSTAIN ITSELF. HEADING INTO WED THE L/W TORUGH WILL BEGIN TO DEEPEN BUT REMAIN OVER THE REGION WITH BROAD SWRLY FLOW ONCE AGAIN LEADING TO MULTIPLE IMPULSES PUSHING ACROSS THE REGION. TIMING THESE SPECIFIC IMPULSES IS FUTILE AT THIS TIME BUT BY TUE NIGHT WE SHOULD BE ABLE TO SEE THEM. DEEP MOISTURE WILL STILL BE IN PLACE WITH PWS OF GREATER THAN 1.5 INCHES WHICH IS ABOUT 120% OF NORMAL NOT AS HIGH AS WE CURRENTLY ARE BUT GOOD ENOUGH TO GET SCT CONVECTION WITH EACH IMPULSE. THE FACT THAT THE L/W TROUGH WILL STILL HAVE MADE VERY LITTLE PROGRESSION EAST WILL LEAD TO THE COLD FRONT REMAINING WELL NORTH OF THE REGION. THU AND MAINLY THU NIGHT WILL BE THE TIME FRAME WITH THE BIGGEST CHANGE. THE L/W TROUGH WILL CONTINUE TO DEEPEN THROUGH THE DAY AND OVERNIGHT THU IT SHOULD START TO PUSH EAST AS THE STRONGEST MID LVL WINDS WILL FINALLY BE DOWNSTREAM OF THE TROUGH AXIS. AS THIS PUSHES EAST LOOK FOR THE COLD FRONT TO GET A STRONG KICK SOUTH MOVING THROUGH THE AREA OVERNIGHT WITH A RATHER COLD AND DRY AIRMASS MOVING IN BEHIND THE FRONT. AHEAD OF THE FRONT MOISTURE WILL STILL BE IN PLACE AND WITH DECENT FORCING FROM ALOFT ALLWOING FOR ANOTHER DAY OF SCT CONVECTION. .LONG TERM...THE MEDIUM RANGE MDLS ARE IN DECENT AGREEMENT WITH THE EVOLUTION OF THE L/W TROUGH/MID LVL PATTERN THROUGH THE FIRST HALF OF THE WEEKEND THEN SOME NOTICEABLE DIFFERENCES BEGIN TO SHOW UP. THAT SAID OVERALL THE SENSIBLE WEATHER REALLY WONT BE MUCH DIFFERENT EITHER WAY. WILL STICK CLOSE TO LATEST MEX GUIDANCE WITH BIGGEST DEVIATIONS GOING TWRDS MORNING LOWS AS BOTH THE GFS AND ECMWF ARE IN RATHER GOOD AGREEMENT WITH MUCH LOWER DEWPOINTS PUSHING INTO THE REGION. OVERALL FCST CONFIDENCE IS HIGH IN A MUCH COOLER FCST FRI AND INTO NEXT WEEK. THE COLD FRONT WILL PUSH WELL INTO THE GULF FRI WITH COOLER AND DRIER AIR PUSHING IN. THE L/W TROUGH WILL BE EAST OF THE REGION WITH AN UPPER LOW EVENTUALLY DEVELOPING OVER THE SERN CONUS OR MID ATLANTIC REGION. THIS WILL KEEP THE AREA UNDER NRLY/NWRLY FLOW HELPING TO DRY THE AREA OUT. LL TEMPS WILL DROP SIGNIFICANTLY WITH H925 TEMPS OF 16-18C EXPECTED OVER THE REGION THIS WEEKEND AND INTO NEXT WEEK. LL TEMPS OF THIS MAGNITUDE WOULD SUGGEST HIGHS IN THE MID UPPER 70S BUT GIVEN IT IS STILL GOING TO BE LATE SEP WITH QUITE A BIT OF SUNLIGHT(NOT NECESSARILY SUNNY DAYS JUST LENGTH OF DAY IS STILL LONG)...HIGHS WILL LIKELY REACH THE LOWER 80S. AS FOR MORNING LOWS...SUN AND MON MORNING WILL LIKELY BE THE COOLEST AS WINDS SHOULD DIE DOWN SUFFICIENTLY OVERNIGHT AND WITH DEWPOINTS EXPECTED IN THE LOWER TO MID 50S...POSSIBLY IN THE UPPER 40S ACROSS SWRN MS...MORNING LOWS COULD DROP INTO THE LOWER 50S ACROSS THE NRN 3RD SUN MORNING. /CAB/ && .AVIATION... PATCHY FOG THROUGH THE EARLY MORNING. SEVERAL ROUNDS OF SH/TS WILL VISIT EACH TERMINAL TODAY WITH MSY...BTR AND MCB BEING AFFECTED FIRST DURING THE EARLY MORNING HOURS. CEILINGS WILL BE A VARIETY OF HEIGHTS WITH TS ACTIVITY CREATING CEILINGS IN THE 020 TO 040 RANGE. AREAS OUTSIDE OF TS SHOULD SEE 060 TO 080. ANYTHING OUTSIDE THIS WILL BE 110. SOME WORSENING FOG CONDITIONS MAY PRESENT TONIGHT AS ALL AREAS WILL HAVE RECEIVED RAIN AND CEILINGS SHOULD RETREAT TO AROUND 110 OR EVEN CLEAR IN SOME SPOTS. /TE/ && .MARINE... EAST TO SOUTHEAST WINDS WILL PERSIST OVER THE COASTAL WATERS THROUGH THURSDAY. A BRIEF PERIOD OF 15 KNOT WINDS WILL BE POSSIBLE FOR A SHORT TIME TODAY AS AN INVERTED TROUGH MOVES THROUGH. THE NEXT COLD FRONT SHOULD MOVE INTO THE COASTAL WATERS BY FRIDAY...BRINGING A WIND SHIFT ALONG WITH DRIER AIR AND LOWER RAIN CHANCES. THE DRIER AIR COULD LEAD TO GUSTY CONDITIONS FOR THE WEEKEND. /TE/ && .PRELIMINARY POINT TEMPS/POPS... MCB 85 67 86 66 / 70 30 30 20 BTR 88 70 89 68 / 70 30 30 20 ASD 85 70 88 69 / 70 30 30 20 MSY 85 72 87 72 / 60 30 30 20 GPT 82 69 86 70 / 70 30 30 20 PQL 83 67 88 68 / 70 30 40 20 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. GM...NONE. MS...NONE. GM...NONE. && SHORT/LONG TERM: CAB AVIATION/MARINE: TE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1059 AM CDT MON SEP 19 2011 GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037- 039-040-046>050-056>072-MSZ068>071-077-080>082-201600- LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND- LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND- COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER OUT 20 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON OUT 20 NM- COASTAL WATERS FROM BOOTHVILLE LA TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM- COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA OUT 20 NM- COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER FROM 20 TO 60 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON FROM 20 TO 60 NM- COASTAL WATERS FROM STAKE ISLAND LA TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM- COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA FROM 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA- 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-NORTHERN TANGIPAHOA- SOUTHERN TANGIPAHOA-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER- HANCOCK-HARRISON-JACKSON- 1059 AM CDT MON SEP 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS SOUTHEAST LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT THE PEARL RIVER REMAINS ABOVE FLOOD STAGE NEAR BOGALUSA AND NEAR THE TOWN OF PEARL RIVER. REFER TO THE LATEST RIVER FLOOD STATEMENTS FOR DETAILS. SCATTERED TO NUMEROUS SHOWERS AND EMBEDDED THUNDERSTORMS WILL INCREASE IN AREAL COVERAGE AND INTENSITY THROUGH THE DAY ACROSS SOUTHERN MISSISSIPPI AND SOUTHEASTERN LOUISIANA. THE MAIN CONCERNS WILL BE CLOUD TO GROUND LIGHTNING AND LOCALLY HEAVY RAIN THAT MAY PRODUCE MINOR PONDING OF WATER IN LOW LYING AREAS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY THE AIRMASS OVER THE CENTRAL GULF COAST WILL CONTINUE TO BE MORE HUMID AND UNSTABLE THROUGH THURSDAY. THERE WILL BE A CHANCE OF SHOWERS AND THUNDERSTORMS ACROSS THE ENTIRE OUTLOOK AREA EACH DAY THROUGH THURSDAY. A COLD FRONT IS FORECAST TO MOVE THROUGH THE AREA THURSDAY NIGHT...WHICH SHOULD PUT AN END TO THE RAIN CHANCES. HEAVY RAINFALL WILL POSSIBLE IN A FEW LOCATIONS EACH DAY. NUISANCE FLOODING OF ISOLATED LOW- LYING AREAS AND URBAN AREAS WILL BE THE MAIN IMPACT. THE PEARL RIVER IS EXPECTED TO FALL BELOW FLOOD STAGE NEAR BOGALUSA AND NEAR THE TOWN OF PEARL RIVER ON THURSDAY. REFER TO THE LATEST RIVER FLOOD STATEMENTS FOR DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. 95/DM
The Mobile radar (KMOB), 84 km away, was scanning. The volume nearest the first event began at 17:46 UTC.
1 tornado. Local standard time, as filed.
Waterspout reported moving onshore by law enforcement near Courthouse Road. Dissipation occurred at 1255 CDT. No damage reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2011Every state in 2011This day in weather historyThe tornado archive for Mississippi, 2011Warnings in Mississippi, September 2011
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: 334432.