Low pressure near Houston, Texas moved into central Mississippi during the daytime hours. A few thunderstorms reached severe limits, including 2 tornadoes.
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.
Low pressure near Houston, Texas moved into central Mississippi during the daytime hours. A few thunderstorms reached severe limits, including 2 tornadoes.
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 30, 7:28 AM CST, 5 hours 35 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
828 AM CDT SUN SEP 30 2012
.UPDATE...
...SOUNDING DISCUSSION...
NO PROBLEMS WITH THE FLIGHT THIS MORNING. THE SOUNDING SHOWS PW
VALUES CONTINUE TO BE HIGH...AND JUST SLIGHTLY LOWER THAN
YESTERDAY MORNING AT 2.23 INCHES. DEWPOINTS ARE IN THE LOW TO MID
70S ACROSS MUCH OF THE AREA. WHILE MOISTURE IS CERTAINLY NOT AN
ISSUE...SURFACE HEATING IS LACKING DUE TO LIGHT RAIN AND CLOUD
COVER IN THE AREA. SURFACE TEMPERATURES ARE IN THE MID TO UPPER
70S WHICH WILL RESULT IN A LACK OF INSTABILITY. THIS IS SHOWN IN
THE SOUNDING WITH CAPE VALUES MARGINAL AT BEST. DECENT LOW LEVEL
AND MID LEVEL SHEAR IS IN PLACE WITH WINDS VEERING FROM
SOUTHEASTERLY AT THE SURFACE TO THE SOUTHWEST AND WEST IN THE MID
LEVELS. A BRIEF SPIN UP IS SURELY POSSIBLE WITH ANY STRONGER STORM
THAT FORMS BUT THE MAIN ISSUE WILL CONTINUE TO BE HEAVY RAINFALL
THAT COULD LEAD TO FLASH FLOODING THROUGH THE AFTERNOON HOURS.
98/SO
&&
.PREV DISCUSSION... /ISSUED 309 AM CDT SUN SEP 30 2012/
SYNOPSIS...
SURFACE LOW LOCATED JUST NORTH OF HOUSTON EARLY THIS MORNING. WARM
FRONT EXTENDS EASTWARD ALONG THE LOUISIANA-MISSISSIPPI
BORDER...JUST SOUTH OF MCCOMB AND HATTIESBURG. UPPER LOW IS
CENTERED OVER OKLAHOMA. ONE BAND OF SHOWERS IS EXITING THE
MISSISSIPPI COASTAL COUNTIES. ANOTHER BAND OF SHOWERS IS MOVING
EAST OF THE ATCHAFALAYA RIVER BASIN...WITH THE MAIN AREA OF RAIN
AND THUNDERSTORMS OVER NORTHERN LOUISIANA AND EASTERN TEXAS.
TEMPERATURES ARE IN THE MIDDLE 70S EVERYWHERE EXCEPT
MCCOMB...NORTH OF THE WARM FRONT...WHERE TEMPERATURES ARE IN THE
MIDDLE 60S. AIRMASS IS NEARLY SATURATED AT ALL SITES.
SHORT TERM...
MAIN WEATHER THREATS ARE IN THE FIRST 24 HOURS OF THE FORECAST.
TEXAS LOW IS STILL ANTICIPATED TO MOVE EAST-NORTHEAST JUST SOUTH
OF AN ALEXANDRIA TO NATCHEZ LINE TODAY AND TONIGHT BEFORE REACHING
CENTRAL MISSISSIPPI MONDAY MORNING...AND INTO WESTERN KENTUCKY BY
TUESDAY MORNING. WIDESPREAD RAIN WILL BE ALONG AND JUST LEFT OF
THE SURFACE LOW TRACK...WHICH SHOULD KEEP THE HEAVIEST RAIN JUST
OUTSIDE OF THE AREA.
HOWEVER...AN UPPER IMPULSE JUST SOUTH OF HOUSTON EARLY THIS
MORNING WILL WORK ACROSS THE AREA THIS AFTERNOON AND EVENING WITH
DRYING BEHIND IT. A BROKEN BAND OF SHOWERS AND THUNDERSTORMS WILL
DEVELOP AHEAD OF THIS IMPULSE AND MOVE ACROSS THE AREA...BETWEEN
2PM AND 10PM TODAY. PRECIPITABLE WATER VALUES REMAIN ABOVE 2.25
INCHES EARLY THIS MORNING. THE STRONGEST OF THESE SHOWERS AND
THUNDERSTORMS WILL BE CAPABLE OF PRODUCING A COUPLE OF INCHES OF
RAIN IN AN HOUR OR LESS. GROUND IS SATURATED ACROSS JUST ABOUT THE
ENTIRE AREA...SO WILL LEAVE FLASH FLOOD WATCH IN PLACE...AND IT
MAY NEED TO BE EXTENDED A FEW HOURS BY THE DAY SHIFT. SHEAR WILL
BE SUFFICIENT FOR SEVERE WEATHER...BUT WITH THE SATURATED
SOUNDINGS...INSTABILITY WILL BE VERY LIMITED. CELLS ALONG THE
BAND OF SHOWERS AND THUNDERSTORMS WILL NEED TO BE WATCHED FOR
BRIEF CIRCULATIONS.
MAIN AREA OF PRECIPITATION SHOULD CLEAR THE CWA BEFORE MIDNIGHT.
WITH DEEPENING UPPER AND SURFACE LOWS JUST TO THE NORTH OF THE
AREA...COULD STILL SEE SOME SCATTERED SHOWERS INTO MONDAY
EVENING...BUT RAINFALL AMOUNTS FROM THESE SHOWERS WILL BE LIMITED.
TEMPERATURES WILL BE SOMEWHAT TRICKY TODAY...AS ANY BREAKS IN
CLOUDS MAY ALLOW TEMPERATURES TO SNEAK INTO THE LOWER 80S. BEHIND
THE FRONT...CLOUDS WILL HOLD TEMPERATURES DOWN ON MONDAY AND
TUESDAY...PROVIDING A COUPLE OF DAYS OF BELOW NORMAL TEMPERATURES. 35
LONG TERM...
UPPER TROF AXIS WILL CLEAR THE AREA ON WEDNESDAY...WITH WEST-
NORTHWEST FLOW THE REMAINDER OF THE WEEK INTO THE WEEKEND. A
SYSTEM MOVING THROUGH THE GREAT LAKES WILL PUSH A FRONT THROUGH
THE AREA NEXT WEEKEND...BUT WILL HAVE LITTLE OR NO MOISTURE TO
WORK WITH. WILL KEEP FORECAST DRY THROUGH NEXT WEEKEND. AFTER A
COOL START WEDNESDAY MORNING...TEMPERATURES WILL AVERAGE 3-5
DEGREES ABOVE NORMAL UNTIL THE FRONTAL PASSAGE. 35
AVIATION...
MVFR TO IFR CONDITIONS WILL PREVAIL THROUGHOUT THE FCST DUE TO
CEILINGS AND OCCASIONAL PERIODS OF RAIN/CONVECTION. SOUTHERLY
WINDS WILL ALSO INCREASE DURING THE DAY AS AN AREA OF LOW
PRESSURE APPROACHES AND MOVES ACROSS SOUTH LOUISIANA. SOME DRIER
AIR WILL LIKELY BEGIN TO WORK INTO THE REGION LATE THIS AFTERNOON
AND EVENING RESULTING IN DIMINISHING RAIN COVERAGE AT THAT TIME.
/11/
MARINE...
WINDS ARE ALREADY ON THE WAY UP WITH SUSTAINED WINDS NEAR 15 KTS
OVER THE COASTAL WATERS WEST OF THE MOUTH OF THE MS RIVER. AS THE
SFC LOW OVER SERN TX CONTINUES TO MOVE TO THE ENE THROUGH THE SWRN
LA AND INTO CNTRL MS AND DEEPEN...WINDS WILL CONTINUE TO RAMP UP
AND SCY CONDITIONS WILL DEVELOP LATE THIS MORNING. WINDS WILL
BECOME SUSTAINED AT 25 KTS OUT OF THE SOUTH WEST OF THE MS RIVER
BEFORE NOON AND THEN EXPAND EAST OVER MUCH OF THE WATERS ALONG
WITH THE LAKES AND SOUNDS THIS AFTN. AS THE SFC LOW CONTINUES TO
MOVE OFF TO THE ENE AND THEN NE WINDS WILL SHIFT OUT OF THE W AND
THEN NW. SCY CONDITIONS WILL LIKELY PERSIST THROUGH THE DAY AND
NIGHT MON AND FINALLY BY TUE THE PRESSURE GRADIENT WILL FINALLY
RELAX AND WINDS SHOULD DROP BELOW 20 KTS. /CAB/
DECISION SUPPORT...
DSS CODE...BLUE.
DEPLOYED...NONE.
ACTIVATION...NONE.
ACTIVITIES...HURRICANE ISAAC RECOVERY SUPPORT
DECISION SUPPORT SERVICES (DSS) CODE LEGEND
GREEN = NO WEATHER IMPACTS THAT REQUIRE ACTION
BLUE = LONG FUSED WATCH/WARNING/ADVISORY IN EFFECT OR HIGH
VISIBILITY EVENT
YELLOW = HEIGHTENED IMPACTS WITH SHORT FUSED
WATCH/WARNING/ADVISORY ISSUANCES; RADAR SUPPORT
ORANGE = HIGH IMPACTS - SLIGHT TO MODERATE RISK SEVERE; NEARBY
TROPICAL EVENTS; HAZMAT OR OTHER LARGE EPISODES
RED = FULL ENGAGEMENT FOR MODERATE TO HIGH RISK SVR AND/OR
DIRECT TROPICAL THREATS; EVENTS OF NATIONAL SIGNIFICANCE
&&
.PRELIMINARY POINT TEMPS/POPS...
MCB 62 72 54 78 / 60 30 10 10
BTR 64 75 55 80 / 50 20 10 10
ASD 69 76 58 79 / 60 30 20 10
MSY 68 76 60 79 / 60 20 20 10
GPT 71 77 59 78 / 70 30 20 10
PQL 72 78 60 77 / 70 30 20 10
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FLASH FLOOD WATCH UNTIL 7 PM SUNDAY FOR THE FOLLOWING ZONES:
ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST
FELICIANA...IBERVILLE...LIVINGSTON...LOWER
JEFFERSON...LOWER LAFOURCHE...LOWER PLAQUEMINES...LOWER ST.
BERNARD...LOWER TERREBONNE...NORTHERN
TANGIPAHOA...ORLEANS...POINTE COUPEE...SOUTHERN
TANGIPAHOA...ST. CHARLES...ST. HELENA...ST. JAMES...ST.
JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER
LAFOURCHE...UPPER PLAQUEMINES...UPPER ST. BERNARD...UPPER
TERREBONNE...WASHINGTON...WEST BATON ROUGE...AND WEST
FELICIANA.
GM...SMALL CRAFT ADVISORY UNTIL 7 PM MONDAY FOR THE FOLLOWING ZONES:
BRETON SOUND...CHANDELEUR SOUND...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 FROM 20 TO 60 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 PORT FOURCHON TO LOWER ATCHAFALAYA
RIVER OUT 20 NM...COASTAL WATERS FROM STAKE ISLAND LA TO
THE SOUTHWEST PASS OF THE MISSISSIPPI 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 THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER TO PORT FOURCHON OUT 20 NM...LAKE
BORGNE...LAKE PONTCHARTRAIN AND LAKE MAUREPAS...AND
MISSISSIPPI SOUND.
MS...FLASH FLOOD WATCH UNTIL 7 PM SUNDAY FOR THE FOLLOWING ZONES:
AMITE...HANCOCK...HARRISON...JACKSON...PEARL
RIVER...PIKE...WALTHALL...AND WILKINSON.
GM...SMALL CRAFT ADVISORY UNTIL 7 PM MONDAY FOR THE FOLLOWING ZONES:
BRETON SOUND...CHANDELEUR SOUND...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 FROM 20 TO 60 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 PORT FOURCHON TO LOWER ATCHAFALAYA
RIVER OUT 20 NM...COASTAL WATERS FROM STAKE ISLAND LA TO
THE SOUTHWEST PASS OF THE MISSISSIPPI 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 THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER TO PORT FOURCHON OUT 20 NM...LAKE
BORGNE...LAKE PONTCHARTRAIN AND LAKE MAUREPAS...AND
MISSISSIPPI SOUND.
&&HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1057 AM CDT SUN SEP 30 2012 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>082-010400- 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- 1057 AM CDT SUN SEP 30 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT WIDESPREAD SHOWERS AND ISOLATED THUNDERSTORMS ARE EXPECTED THROUGH THIS EVENING. A FEW STORMS MAY BRIEFLY BECOME STRONG TO SEVERE WITH DAMAGING WINDS...AND A BRIEF ISOLATED TORNADO CANNOT BE RULED OUT. HOWEVER...THE MAIN THREAT WILL BE LOCALLY HEAVY RAINFALL AND OCCASIONAL LIGHTNING STRIKES. A FLASH FLOOD WATCH IS IN EFFECT THROUGH THIS EVENING. PERSISTENT RAINFALL MAY TOTAL 2 TO 3 INCHES WITH LOCALLY HEAVIER AMOUNTS AND FLASH FLOODING POSSIBLE. A FEW AREAS THAT RECEIVE PERSISTENT OR REPEAT HEAVY RAINFALL COULD EXPERIENCE URBAN FLOODING OF STREETS AND LOW LYING...POORLY DRAINED AREAS...AND ELEVATED LEVELS ON DRAINAGE CANALS...BAYOUS...SMALL STREAMS AND CREEKS. SEVERAL STREAMS IN ST. TAMMANY PARISH AND PEARL RIVER COUNTY HAVE REACHED FLOOD STAGE THIS MORNING FROM HEAVY RAINFALL SATURDAY EVENING. A SMALL CRAFT ADVISORY IS IN EFFECT OVER ALL COASTAL WATERS AND TIDAL LAKES TODAY AND TONIGHT FOR WINDS OF 20 TO 25 KNOTS. TIDES ARE EXPECTED TO INCREASE TO ONE HALF TO ONE FOOT ABOVE NORMAL SUNDAY INTO EARLY MONDAY DUE TO STRONG SOUTH WINDS...PARTICULARLY ALONG SOUTH FACING SHORES. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SMALL CRAFT ADVISORIES WILL BE IN EFFECT MONDAY FOR ALL COASTAL WATERS AND TIDAL LAKES FOR 20 TO 25 KNOT WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. EMERGENCY MANAGERS ARE ENCOURAGED TO MONITOR THE WEATHER FOR LOCALIZED FLOOD POTENTIAL DUE TO PERSISTENT RAINS AND ELEVATED TIDES. THERE IS AN INCREASED POTENTIAL FOR LOCAL FLOODING IN AREAS WHERE WATER REMAINS FROM HURRICANE ISAAC.
LAZ059-060-065-066-301600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1000 AM CDT SUN SEP 30 2012 ...STRONG THUNDERSTORM MOVING NORTHEAST AFFECTING UPPER TERREBONNE PARISH...UPPER LAFOURCHE PARISH...ST. CHARLES PARISH...LOWER TERREBONNE PARISH... AT 958 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM ABOUT 3 MILES SOUTH OF HOUMA...MOVING NORTHEAST AT 35 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...HOUMA... BAYOU CANE...LOCKPORT...MATHEWS...RACELAND...DES ALLEMANDS...BOUTTE AND HAHNVILLE THE PRIMARY THREAT FROM THIS STORM IS WIND GUSTS TO NEAR 40 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. 22/TD
LAZ059>061-065-066-301630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1024 AM CDT SUN SEP 30 2012 ...STRONG THUNDERSTORM MOVING NORTHEAST AFFECTING TERREBONNE PARISH...UPPER LAFOURCHE PARISH...UPPER JEFFERSON PARISH...ST. CHARLES PARISH... AT 1018 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 19 MILES SOUTHWEST OF HOUMA...OR ABOUT 9 MILES WEST OF DULAC...MOVING NORTHEAST AT 45 MPH. THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...DULAC... CHAUVIN...MONTEGUT...HOUMA...LOCKPORT...MATHEWS...RACELAND...DES ALLEMANDS...BOUTTE...HAHNVILLE...DESTREHAN...NEW SARPY...WAGGAMAN AND AVONDALE THE PRIMARY THREAT FROM THIS STORM IS WIND GUSTS TO NEAR 50 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. BE PREPARED TO TAKE QUICK ACTION IF A WARNING IS ISSUED. STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE LOCAL MEDIA OUTLETS FOR FURTHER DETAILS OR UPDATES FROM THE NATIONAL WEATHER SERVICE. 22/TD
LAZ058>062-064-301700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1122 AM CDT SUN SEP 30 2012 ...CLUSTER OF STRONG THUNDERSTORMS MOVING NORTHEAST AFFECTING ST. JOHN THE BAPTIST PARISH...UPPER LAFOURCHE PARISH...UPPER JEFFERSON PARISH...ORLEANS PARISH...UPPER ST. BERNARD PARISH...ST. CHARLES PARISH... AT 1118 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS WITH VERY HEAVY RAINFALL ALONG A LINE EXTENDING FROM AVONDALE TO 11 MILES NORTH OF LAROSE...MOVING NORTHEAST AT 35 MPH. THE CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...WESTWEGO...DES ALLEMANDS...MARRERO...HARVEY...EDGARD... GRETNA...BOUTTE...TERRYTOWN...NEW ORLEANS...HAHNVILLE...NEW SARPY... DESTREHAN...NORCO...LAPLACE...AVONDALE...WAGGAMAN...HARAHAN... KENNER...NEW ORLEANS ARMSTRONG AIRPORT...BRIDGE CITY...EAST NEW ORLEANS...METAIRIE AND LAKEFRONT AIRPORT THE PRIMARY THREAT FROM THESE STORMS IS WIND GUSTS TO NEAR 40 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. THESE STORMS 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. 22/TD
LAZ034-035-046-MSZ068-301915- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 115 PM CDT SUN SEP 30 2012 ...LINE OF STRONG THUNDERSTORMS MOVING NORTHEAST AFFECTING WILKINSON COUNTY...POINTE COUPEE PARISH...WEST FELICIANA PARISH...IBERVILLE PARISH... AT 114 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM 21 MILES EAST OF SIMMESPORT TO KROTZ SPRINGS...MOVING NORTHEAST AT 30 MPH. THE LINE OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND... LOTTIE...MORGANZA...LIVONIA...NEW ROADS...ST. FRANCISVILLE... WAKEFIELD AND WOODVILLE THE PRIMARY THREAT FROM THESE STORMS IS WIND GUSTS TO NEAR 40 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. THESE STORMS 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. BE PREPARED TO TAKE QUICK ACTION IF A WARNING IS ISSUED. STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE LOCAL MEDIA OUTLETS FOR FURTHER DETAILS OR UPDATES FROM THE NATIONAL WEATHER SERVICE.
LAZ061>064-301845- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 118 PM CDT SUN SEP 30 2012 ...LINE OF STRONG STORMS MOVING NORTHEAST AFFECTING UPPER JEFFERSON PARISH...UPPER PLAQUEMINES PARISH...ORLEANS PARISH...UPPER ST. BERNARD PARISH... AT 114 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG STORMS FROM KENNER TO 6 MILES SOUTH OF BELLE CHASSE...MOVING NORTHEAST AT 40 MPH. THE LINE OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND... HARVEY...TIMBERLANE...GRETNA...TERRYTOWN...NEW ORLEANS...CHALMETTE... LAKEFRONT AIRPORT...VIOLET AND EAST NEW ORLEANS. THE PRIMARY THREAT FROM THESE STORMS IS WIND GUSTS TO NEAR 40 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. THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A SHORT PERIOD OF TIME...RESULTING IN PONDING OF WATER AROUND LOW LYING ROADWAYS. RAINFALL TOTALS OF UP TO ONE INCH HAVE ALREADY FALLEN ACROSS THE AREA IN THE LAST HOUR AND AN ADDITIONAL INCH OF RAIN IS POSSIBLE OVER THE NEXT 30 TO 45 MINUTES. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING. 98/SO
The national radar mosaic for the moment the first event began.
1 thunderstorm wind, 1 tornado. Local standard time, as filed.
Several small pine trees were uprooted and snapped in the Judy Dahl Road area north of Highway 24. Some trees had to be cleared from the roads in that area.
A weak tornado touched down along an intermittent track from the Cypress Lake area northeastward to just southwest of the community of Necaise. A few homes had minor roof damage, one home was shifted off its foundation. One home had a portion of siding roof peeled off, and a few trees were snapped or blown down. Most of the damage path was rated as WF0 with an isolated area of EF1 damage. Path length was 6 miles, path width 40 yards. Maximum winds were approximately 100 mph. Time of event was based on radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2012Every state in 2012This day in weather historyThe tornado archive for Mississippi, 2012Warnings in Mississippi, September 2012
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: 413274, 413276.