An isolated severe thunderstorm developed along a seabreeze boundary along the Mississippi coast.
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.
An isolated severe thunderstorm developed along a seabreeze boundary along the Mississippi coast.
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 Jun 12, 1:34 PM CST, 4 hours 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS LA 234 PM CDT SUN JUN 12 2011 .SYNOPSIS... A SURFACE LOW IS LOCATED OVER SOUTHEAST CANADA JUST NORTH OF NEW YORK. A WEAK COLD FRONT EXTENDS FROM THE LOW SOUTHWESTWARD INTO THE MIDDLE MISSISSIPPI VALLEY. LOCALLY...HIGH PRESSURE REMAINS CENTERED OVER THE NORTHERN GULF OF MEXICO. TEMPERATURES ARE HOVERING NEAR 90 DEGREES AND MAY RISE ANOTHER FEW DEGREES BEFORE BEGINNING TO COOL. ISOLATED SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ACROSS SOUTHWESTERN MISSISSIPPI AND ALSO ACROSS THE RIVER PARISHES. EXPECT CONVECTION TO SLOWLY DRIFT SOUTHWARD...WITH ADDITIONAL SHOWERS AND THUNDERSTORMS POSSIBLY DEVELOPING ALONG OUTFLOW BOUNDARIES AND/OR THE SEA BREEZE. && .DISCUSSION... THIS WILL LIKELY COME AS NO SHOCK...BUT THE FORECAST REQUIRED VERY FEW CHANGES. FORECAST MODELS REMAIN IN GOOD AGREEMENT AND THUS FORECAST THINKING REMAINS UNCHANGED. TODAY WILL LIKELY BE THE LAST DAY WITH ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS DURING THE AFTERNOON/EARLY EVENING HOURS. DEEP LAYER RIDGING WILL STRENGTHEN ON MONDAY...WITH SUBSIDENCE EFFECTIVELY KILLING THE CHANCE OF RAIN. THOUGH AN ISOLATED SHOWER/THUNDERSTORM OR TWO CANNOT BE ENTIRELY RULED OUT...THE CHANCES REMAIN LOW ENOUGH TO LEAVE OUT OF THE FORECAST AT THIS TIME. WITH LITTLE RELIEVE FROM CONVECTION...EXPECT AFTERNOON TEMPERATURES TO REMAIN WELL ABOVE NORMAL...RISING INTO THE MID TO UPPER 90S THROUGH THE REMAINDER OF THE FORECAST PERIOD. WILL TREND SLIGHTLY ABOVE GUIDANCE...BUT WILL KEEP TEMPERATURES BELOW THE CENTURY MARK FOR NOW. WITH TEMPERATURES IN THE MID TO UPPER 90S...HEAT INDEX VALUES WILL RISE TO NEAR OR SLIGHTLY ABOVE THE CENTURY MARK THROUGH MUCH OF THE WEEK. THOSE WITH OUTDOOR ACTIVITIES PLANNED SHOULD BE SURE TO DRINK PLENTY OF WATER IN ORDER TO COMBAT THE OPPRESSIVE HEAT. && .AVIATION... A WEST NORTHWEST TO EAST SOUTHEAST WEAK TROUGH IS LINGERING ALONG THE MISSISSIPPI RIVER EXTENDING OUT TO THE CHANDELEUR ISLANDS AND IS PROVIDING A LOW LEVEL FOCUS FOR SHOWER AND THUNDERSTORM DEVELOPMENT. A LIGHT HAZE SHOULD DELAY ONSET OF THUNDERSTORMS AND CAUSE THEM TO LINGER UNTIL 04Z THIS EVENING. AWAY FROM THUNDERSTORMS EXPECT SCATTERED CLOUDS AROUND 4 THOUSAND FEET AND VISIBILITY AROUND 6 MILES IN HAZE. && .MARINE... HIGH PRESSURE WILL REMAIN IN PLACE ACROSS THE NORTHERN GULF WITH A VERY WEAK PRESSURE GRADIENT ACROSS THE COASTAL WATERS. THIS WILL RESULT IN GENERALLY LIGHT WINDS AND LOW SEAS THROUGH MUCH OF THE FORECAST PERIOD. BY MIDWEEK...WINDS WILL PICK UP SLIGHTLY...INTO THE 10 TO 15 KNOT RANGE. && .PRELIMINARY POINT TEMPS/POPS... MCB 69 96 70 97 / 20 10 10 10 BTR 70 96 74 97 / 20 10 10 10 ASD 72 95 74 95 / 20 10 10 10 MSY 75 94 75 94 / 20 10 10 10 GPT 74 94 74 94 / 20 20 10 10 PQL 70 96 73 96 / 20 20 10 10 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...NONE. GM...NONE. MS...NONE. GM...NONE. && AVIATION...MCK REST OF DISCUSSION...95/DM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 600 PM CDT SUN JUN 12 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>082-131800- 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- 600 PM CDT SUN JUN 12 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF COASTAL WATERS OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI. .DAY ONE...TONIGHT ISOLATED THUNDERSTORMS WILL BE POSSIBLE THROUGH THE EVENING HOURS. ONE OR TWO OF THESE STORMS COULD BE STRONG TO SEVERE. FLOOD WARNINGS WILL REMAIN IN EFFECT FOR SEVERAL POINTS ALONG THE MISSISSIPPI AND ATCHAFALAYA RIVERS. PLEASE REFER TO THE LATEST FLOOD WARNINGS AND STATEMENTS FOR DETAILS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY FLOOD WARNINGS WILL REMAIN IN EFFECT FOR SEVERAL POINTS ALONG THE MISSISSIPPI AND ATCHAFALAYA RIVERS. PLEASE REFER TO THE LATEST FLOOD WARNINGS AND STATEMENTS FOR DETAILS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
MSZ077-080-122330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 555 PM CDT SUN JUN 12 2011 ...STRONG THUNDERSTORM MOVING SOUTH AFFECTING PEARL RIVER COUNTY... HANCOCK COUNTY... AT 553 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM NEAR PICAYUNE...OR ABOUT 4 MILES NORTH OF PICAYUNE...MOVING SOUTH AT 10 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... PICAYUNE BY 620 PM... THE PRIMARY THREATS FROM THIS STORM ARE PEA TO DIME SIZE HAIL AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED. FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. 24/RR
MSZ081-122330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 556 PM CDT SUN JUN 12 2011 ...STRONG THUNDERSTORM MOVING SOUTH AFFECTING HARRISON COUNTY... AT 553 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 16 MILES NORTH OF LONG BEACH...OR ABOUT 5 MILES SOUTHWEST OF SAUCIER...MOVING SOUTH AT 10 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... LYMAN BY 630 PM... THE PRIMARY THREATS FROM THIS STORM ARE PEA TO DIME SIZE HAIL AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED. FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. 24/RR
LAZ050-072-130000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 618 PM CDT SUN JUN 12 2011 ...CLUSTER OF STRONG THUNDERSTORMS MOVING SOUTH AFFECTING SOUTHEAST LIVINGSTON PARISH...SOUTHERN TANGIPAHOA PARISH... AT 612 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS NEAR HAMMOND...MOVING SOUTH AT 15 MPH. THE CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...PONCHATOULA...HAMMOND AND SPRINGFIELD. THE PRIMARY THREATS FROM THESE STORMS ARE PEA TO DIME SIZE HAIL AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED. FREQUENT LIGHTNING IS OCCURRING WITH THESE STORMS. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.
LAZ061-062-130000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 630 PM CDT SUN JUN 12 2011 ...STRONG THUNDERSTORM MOVING EAST AFFECTING ORLEANS PARISH... JEFFERSON PARISH... AT 626 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM IN METAIRIE...MOVING EAST AT 10 MPH. THE STRONG THUNDERSTORM WILL BE NEAR... UPPER NEW ORLEANS BY 645 PM... THE PRIMARY THREAT FROM THIS STORM IS WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED. THIS STORM COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A SHORT PERIOD OF TIME...RESULTING IN PONDING OF WATER AROUND LOW LYING ROADWAYS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING. FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. 24/RR
LAZ047>050-130045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 653 PM CDT SUN JUN 12 2011 ...LINE OF STRONG THUNDERSTORMS MOVING SOUTH AFFECTING ASCENSION PARISH...WEST BATON ROUGE PARISH...EAST BATON ROUGE PARISH... LIVINGSTON PARISH... AT 649 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM ZACHARY TO DENHAM SPRINGS...MOVING SOUTH AT 15 MPH. THE LINE OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...BAKER...BATON ROUGE AIRPORT...BATON ROUGE...WESTMINSTER... PRAIRIEVILLE...PORT ALLEN...OAK HILLS PLACE AND GARDERE. THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING...PEA TO DIME SIZE HAIL...AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED.
MSZ080-081-130045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 704 PM CDT SUN JUN 12 2011 ...CLUSTER OF STRONG THUNDERSTORMS MOVING SOUTH AFFECTING EASTERN AND SOUTHERN HANCOCK COUNTY...WESTERN HARRISON COUNTY... AT 659 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS NEAR DIAMONDHEAD...MOVING SOUTH AT 15 MPH. THE CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...PASS CHRISTIAN...BAY ST. LOUIS AND WAVELAND. THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND GUSTS 35 TO 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THESE STORMS HAVE PASSED.
The Mobile radar (KMOB), 98 km away, was scanning. The volume nearest the first event began at 00:25 UTC.
1 thunderstorm wind. Local standard time, as filed.
An oak tree and a small pine tree were blown down by a microburst on the west side of Harrison County just north of Interstate 10.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2011Every state in 2011This day in weather historyWarnings in Mississippi, June 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: 311061.