...LOCAL 2010 WEATHER YEAR IN REVIEW...

THE FOLLOWING LIST OF EVENTS ARE SOME OF THE MORE NOTABLE WEATHER EVENTS
THAT TOOK PLACE ACROSS SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI
IN THE YEAR 2010.

JANUARY...THE YEAR STARTED OFF WITH A VERY COLD STRETCH OF DAYS DURING THE FIRST
TWO WEEKS. SEVERAL LOCATIONS IN SOUTHERN MISSISSIPPI AND THE LOUISIANA
FLORIDA PARISHES RECORDED MORNING LOWS IN THE TEENS ON THE 9TH...10TH
AND 11TH. ON THE EVENING OF THE 20TH...SEVERE WEATHER MOVED THROUGH
THE NORTH SHORE PARISHES. A TORNADO MOVED THROUGH CENTRAL PORTIONS
OF TANGIPAHOA PARISH...ABOUT 2 MILES NORTH OF LORANGER...CAUSING
SOME DAMAGE TO FARM STRUCTURES.

FEBRUARY...A VERY COLD MONTH WITH AVERAGE TEMPERATURES RANGING 7 TO 8 DEGREES
BELOW NORMAL FOR THE MONTH. ON THE 12TH...SNOW FELL IN A SWATH FROM
THE BATON ROUGE METRO AREA INTO SOUTHWEST MISSISSIPPI. BAKER MEASURED
2 INCHES OF SNOW...MCCOMB HAD 4 INCHES AND PRICEDALE COMMUNITY IN PIKE
COUNTY REPORTED 5 INCHES OF SNOW.

MARCH...A SOMEWHAT RARE EVENT TOOK PLACE ON THE FIRST OF MARCH WITH THE PASSAGE
OF WHAT IS KNOWN AS A WAKE DEPRESSION LOW PRESSURE SYSTEM. THIS IS COMPLEX
WEATHER FEATURE THAT DEVELOPS IN THE WAKE OF A STRONGER LOW PRESSURE
SYSTEM OR BEHIND A SQUALL LINE AND TYPICALLY CAUSES STRONG WINDS OVER
A LARGE AREA. NEW ORLEANS LAKEFRONT AIRPORT MEASURED SUSTAINED WINDS
48 MPH WITH GUSTS TO 60 MPH. APPROXIMATELY 6000 CUSTOMERS LOST POWER
IN NEW ORLEANS DUE TO HIGH WINDS.

APRIL...WHILE NOT EXACTLY WEATHER RELATED...ON THE NIGHT OF THE 20TH THE SEMI-
SUBMERSIBLE OIL PRODUCTION PLATFORM "DEEPWATER HORIZON" EXPLODED AND
BURNED VIOLENTLY UNTIL IT LISTED AND ULTIMATELY SUNK ON THE 21ST IN
THE OUTER LOUISIANA COASTAL WATERS. THIS LED TO A MASSIVE OIL SPILL
THAT WOULD BECOME THE LARGEST IN U.S. HISTORY. THE NATIONAL WEATHER
SERVICE OFFICE IN SLIDELL WAS DIRECTLY INVOLVED IN THE RESPONSE EFFORT
FROM THE INITIAL CALL FOR WEATHER SUPPORT FROM THE UNITED STATES COAST
GUARD SHORTLY AFTER THE INITIAL EXPLOSION. THE RESPONSE TO THIS "SPILL
OF NATIONAL SIGNIFICANCE" IS STILL ONGOING AT THE END OF 2010...WITH
NWS FORECASTS AND BRIEFINGS STILL BEING CONDUCTED DAILY IN SUPPORT OF
THE LARGEST RESPONSE EFFORT IN U.S. HISTORY. ON THE 24TH...SEVERE WEATHER
IMPACTED THE REGION WITH NUMEROUS HAIL STORMS. MOST REPORTED HAIL SIZES
WERE GENERALLY DIAMETERS OF A QUARTER.

MAY...SEVERE WEATHER STRUCK THE NEW ORLEANS METRO AREA IN THE EARLY MORNING
HOURS OF THE 16TH. WIND DAMAGE POSSIBLY PRODUCED BY A SHORT-LIVED
TORNADO TOUCH DOWN IN GRETNA KNOCKED DOWN POWER POLES. OVER 2.5 INCHES
OF RAINFALL IN UNDER TWO HOURS CAUSED FLASH FLOODING IN THE CITY OF
NEW ORLEANS WITH SEVERAL STREETS IMPASSIBLE AND SOME VEHICLES FLOATING
IN SOME INTERSECTIONS. ON THE AFTERNOON OF THE 24TH...A SEVERE THUNDERSTORM
DEVELOPED OVER HANCOCK COUNTY...DUMPING GOLF BALL SIZED HAIL OVER THE
STENNIS SPACE CENTER FACILITY AND IN DIAMONDHEAD. WIND GUSTS TO 60 MPH
WAS RECORDED AT DIAMONDHEAD AIRPORT AND SOME ROOF DAMAGE WAS REPORTED
IN KILN.

JUNE...A COUPLE OF AFTERNOONS FEATURED ISOLATED SEVERE THUNDERSTORMS IN SLIDELL.
ON THE 4TH...WIND DAMAGE WAS REPORTED IN VARIOUS LOCATIONS IN AND AROUND
SLIDELL WITH 60 MPH WIND GUSTS. ON THE NEXT AFTERNOON ON THE 5TH...MORE
WIND DAMAGE OCCURRED WITH 60 MPH WIND GUSTS FROM PULSE TYPE ISOLATED
SEVERE THUNDERSTORMS THAT FORMED ON THE LAKE BREEZE. WIND DAMAGE WAS
ALSO NOTED LATER IN THE MONTH ON THE 27TH IN THE BATON ROUGE METRO AREA
WITH GUSTS AROUND 65 MPH FROM AFTERNOON THUNDERSTORMS.

JULY...THE PRE-SEASONAL ANTICIPATION OF AN ACTIVE ATLANTIC TROPICAL CYCLONE
SEASON...CONCERNS MOUNTED FOR SOUTHEAST LOUISIANA AND COASTAL MISSISSIPPI
WITH THE ON-GOING OIL SPILL AND THE FORMATION OF TROPICAL STORM BONNIE
ON THE 22ND NEAR THE SOUTHERN TIP OF THE FLORIDA PENINSULA. BONNIE'S
PASSAGE OVER LOWER FLORIDA DISRUPTED THE CIRCULATION ENOUGH TO CAUSE
THE TROPICAL SYSTEM TO WEAKEN TO A DEPRESSION AND ULTIMATELY A REMNANT
LOW PRESSURE SYSTEM UPON REACHING THE DEEPWATER HORIZON OPERATIONS AREA.
SOME FLASH FLOODING DID RESULT ACROSS PORTIONS OF SOUTHEAST LOUISIANA
FROM HEAVY TROPICAL RAINS. SOME ISOLATED WIND DAMAGE REPORTS WERE NOTED
FROM THUNDERSTORMS ASSOCIATED WITH THE REMNANTS OF BONNIE. THE
MONTH ENDED UNUSUALLY HOT WITH SEVERAL DAYS HAVING EXCESSIVE HEAT
ADVISORIES AND WARNINGS POSTED.

AUGUST...THE START OF THE MONTH WAS A CONTINUATION OF A HOT SPELL FROM
LATE JULY. MOST LOCATIONS ACROSS SOUTH LOUISIANA AND SOUTHERN MISSISSIPPI
RECORDED 100 DEGREES OR HIGHER ON THE 1ST AND 2ND. THE MONTH WOULD ALSO
END UP EXCESSIVELY WET. RAINFALL TOTALS OVER 11 INCHES PRODUCED THE
3RD WETTEST AUGUST ON RECORD AT BATON ROUGE AND 4TH WETTEST AUGUST AT
NEW ORLEANS. THIS WAS IN LARGE PART DUE TO TROPICAL DEPRESSION FIVE.
ON AUGUST 10TH...TROPICAL DEPRESSION FIVE FORMED ALONG THE SOUTH FLORIDA
PENINSULA AND MOVED TOWARDS THE MOUTH OF THE MISSISSIPPI RIVER. WHILE
THERE WERE EARLY INDICATIONS OF THIS SYSTEM POSSIBLY INTENSIFYING INTO
A TROPICAL STORM...IT WEAKENED AND WAS DECLASSIFIED ON AUGUST 11TH AS
IT MOVED OVER THE OIL SPILL AREA. UPON THE SYSTEM'S ARRIVAL NEAR THE
CHANDELEUR ISLANDS...WINDS WERE BEGINNING TO INCREASE BUT THE SYSTEM
MOVED ASHORE IN EXTREME EASTERN LOUISIANA BEFORE RE-ATTAINING
DEPRESSION STATUS. HEAVY RAINS DID OCCUR FROM TROPICAL DEPRESSION
FIVE WITH NEW ORLEANS RECEIVING 8 INCHES AND MUCH OF THE AREA
RANGING FROM 3 TO 6 INCHES OF TROPICAL RAINFALL OVER TWO DAYS.

SEPTEMBER...A HOT AND DRY MONTH WITH VERY FEW RAIN DAYS. NEW ORLEANS
ONLY MEASURED 0.33 INCHES FOR THE MONTH FOR THE 2ND DRIEST SEPTEMBER
ON RECORD. TEMPERATURES WERE 2 TO 3 DEGREES ABOVE NORMAL FOR THE MONTH.

OCTOBER...A RATHER QUIET UNEVENTFUL MONTH FOR MUCH OF THE AREA. DRY
CONDITIONS CONTINUED ACROSS AREAS NEEDING RAINFALL. A COUPLE OF DAYS
HAD ISOLATED SEVERE WEATHER NOTED. ON THE AFTERNOON OF THE 24TH...A
SEVERE THUNDERSTORM NORTHWEST OF COVINGTON PRODUCED QUARTER TO GOLF BALL
SIZED HAIL. ISOLATED LATE AFTERNOON THUNDERSTORMS ON THE 27TH PRODUCED
MINOR WIND DAMAGE NEAR SAUCIER IN HARRISON COUNTY MISSISSIPPI.

NOVEMBER...AN APPROACHING STRONG COLD FRONT PRODUCED A SQUALL LINE
OF SEVERE THUNDERSTORMS ON THE 29TH. ISOLATED WEAK SHORT-TRACKED
TORNADOES WERE CONFIRMED IN SOUTHWEST MISSISSIPPI NEAR LIBERTY AND
SPOTTY WIND DAMAGE IN WEST FELICIANA PARISH. NO INJURIES OR
SIGNIFICANT DAMAGE WAS NOTED IN THE SERVICE AREA THOUGH MUCH
STRONGER STORMS IN A LARGER OUTBREAK OCCURRED FARTHER NORTH IN
CENTRAL MISSISSIPPI.

DECEMBER...THIS WAS A RATHER QUIET AND DRY MONTH...WITH A PACE TO
BE THE DRIEST DECEMBER ON RECORD AT BATON ROUGE FOR MUCH OF THE
MONTH UNTIL HEAVY RAIN TOTALING OVER 3.5 INCHES FELL ON THE 29TH.
HARD FREEZES ALSO CAME EARLY WITH SOME LOWER 20S RECORDED ON SOME
MORNINGS AS EARLY AS THE 7TH ACROSS SOUTHERN MISSISSIPPI AND THE
LOUISIANA FLORIDA PARISHES. MCCOMB HAD A LOW OF 22 ON THE MORNING
OF THE 9TH. A FEW SNOW GRAINS FELL BRIEFLY ON THE MORNING OF THE
26TH IN PORTIONS OF ST TAMMANY PARISH.

ANNUAL...LA NINA WAS THE DRIVING FORCE BEHIND DEVELOPING DROUGHT
CONDITIONS ACROSS THE MID-GULF STATES REGION. THE YEAR WAS ENDING
WITH MUCH OF THE AREA RANGING FROM UNUSUALLY DRY TO SEVERE DROUGHT
CONDITIONS. ANNUAL RAINFALL DEFICITS BETWEEN 10 AND 18 INCHES WERE
COMMON ACROSS THE REGION. DESPITE MINIMAL IMPACTS FROM TROPICAL
CYCLONES AND LOWER THAN NORMAL SEVERE THUNDERSTORM ACTIVITY...5
WEATHER RELATED DEATHS STILL OCCURRED WITHIN THE WFO NEW
ORLEANS/BATON ROUGE SERVICE AREA IN 2010. FOUR DEATHS WERE DUE TO
EXCESSIVE HEAT IN LATE JULY AND EARLY AUGUST. ONE DEATH WAS DUE TO A
LIGHTNING STRIKE IN BATON ROUGE ON MAY 30TH.

MORE DETAILS ON INDIVIDUAL EVENTS AND OTHER EVENTS NOT LISTED CAN
BE FOUND IN THE STORM DATA PUBLICATIONS ISSUED BY THE NATIONAL
CLIMATIC DATA CENTER AND FROM THE NWS STORM PREDICTION CENTER
EVENT ARCHIVES.

Prepared by RR - Climate Services Focal Point
Updated 01/14/2011

 


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