PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1014 PM EST SUN JAN 1 2012

...2011 RANKED IN THE TOP 10 WARMEST YEARS ACROSS EAST CENTRAL
FLORIDA...

WHILE TEMPERATURES AT THE START OF 2011 WERE COLDER THAN NORMAL...
ABOVE NORMAL TEMPERATURES DOMINATED FOR MUCH OF THE REST OF THE YEAR
ACROSS THE AREA. THIS OVERALL WARMER PATTERN LED TO AVERAGE
TEMPERATURES FOR THE YEAR THAT RANKED IN THE TOP TEN WARMEST YEARS ON
RECORD. SEVERE TO EXTREME DROUGHT CONDITIONS EARLY IN THE YEAR EASED
INTO THE SPRING DUE TO HEAVIER RAINFALL IN MARCH...BUT THEN QUICKLY
WORSENED INTO EARLY SUMMER DUE TO WELL BELOW NORMAL RAINFALL AND ONE
OF THE LATEST STARTS TO THE WET SEASON ON RECORD. PRECIPITATION
DURING THE WET SEASON IN ADDITION TO A VERY WET OCTOBER BROUGHT
RAINFALL AMOUNTS BACK TO NEAR NORMAL FOR THE YEAR.

.2011 YEAR IN REVIEW...

JANUARY-MARCH...
THE NEW YEAR BEGAN UNDER ONGOING STRONG LA NINA CONDITIONS OVER THE
EQUATORIAL PACIFIC OCEAN. LA NINA EVENTS USUALLY BRING A DRIER AND
SLIGHTLY WARMER THAN NORMAL WEATHER PATTERN TO FLORIDA DURING THE
WINTER MONTHS. HOWEVER A STRONG NEGATIVE PHASE OF THE ARCTIC
OSCILLATION...WHICH FAVORS COLD AIR OUTBREAKS ALONG THE EAST COAST
...LINGERED INTO JANUARY AND SUPPRESSED THE TYPICAL LA NINA IMPACTS.
THIS ALLOWED WEATHER CONDITIONS IN JANUARY TO CONTINUE A COLDER
TREND ACROSS THE AREA AFTER A RECORD COLD DECEMBER IN 2010. DURING
THE MONTH SEVERAL STRONG COLD FRONTS MOVED THROUGH THE AREA BRINGING
PERIODS OF WELL BELOW NORMAL TEMPERATURES AND A FEW MORNINGS WITH
FREEZING TEMPERATURES. STORM SYSTEMS DURING THE LATTER HALF OF
JANUARY ALSO PRODUCED NEAR TO ABOVE NORMAL RAINFALL AMOUNTS ACROSS
THE AREA. WHILE THIS RAINFALL WAS WELL NEEDED DUE TO SEVERE TO
EXTREME DROUGHT IN PLACE OVER THE REGION...IT DID LITTLE TO HELP
EASE THE ANTECEDENT DRY CONDITIONS.

THE PASSAGE OF STRONG COLD FRONTS WERE LESS FREQUENT INTO FEBRUARY
AS THE NEGATIVE PHASE OF THE ARCTIC OSCILLATION BEGAN TO DIMINISH.
WARMER THAN NORMAL TEMPERATURES DOMINATED LATER IN THE MONTH WHICH
IS MORE CONSISTENT WITH THE LA NINA PATTERN. WITH WEAKER FRONTS
MOVING ACROSS THE AREA...RAINFALL WAS WELL BELOW NORMAL AND LED TO
ONE OF THE DRIEST FEBRUARIES ON RECORD. ABOVE AVERAGE TEMPERATURES
AND A GENERALLY DRIER THAN NORMAL TREND CONTINUED INTO MUCH OF
MARCH. HOWEVER THE LAST FOUR DAYS OF MARCH SAW THE DEVELOPMENT OF A
MORE DISTURBED WEATHER PATTERN WITH STORMS SYSTEMS CROSSING MUCH OF
THE AREA...PRODUCING WIDESPREAD HEAVY RAINFALL AND A COUPLE BOUTS OF
SEVERE WEATHER. RAINFALL AMOUNTS IN MARCH AROUND 100-150 PERCENT OF
NORMAL BROUGHT SOME SIGNIFICANT RELIEF IN DROUGHT CONDITIONS NORTH
OF OKEECHOBEE COUNTY AND THE TREASURE COAST.

APRIL-JUNE...
LA NINA CONDITIONS OVER THE EQUATORIAL PACIFIC WEAKENED INTO THE
SPRING...HOWEVER THE TYPICAL IMPACTS FROM THIS PATTERN LINGERED OVER
EAST CENTRAL FLORIDA. ABOVE NORMAL TEMPERATURES AND WELL BELOW
NORMAL RAINFALL CHARACTERIZED MUCH OF APRIL THROUGH JUNE. COLD
FRONTS THAT MOVED THROUGH THE AREA WERE WEAK INTO THE REST OF THE
SPRING SEASON AND EVENTUALLY QUIT REACHING THE AREA BY EARLY SUMMER
AS THE ATLANTIC HIGH PRESSURE RIDGE BECAME MORE DOMINANT.

APRIL WAS 3 TO 4 DEGREES WARMER THAN NORMAL ACROSS EAST CENTRAL
FLORIDA AND RANKED IN THE TOP 10 WARMEST APRILS ON RECORD FOR MOST
OBSERVING LOCATIONS. IT WAS ALSO A VERY DRY MONTH WITH PRECIPITATION
AMOUNTS GENERALLY ONLY AROUND 25-50 PERCENT OF NORMAL. MAY BROUGHT
LITTLE CHANGE TO WEATHER CONDITIONS WITH SPARSE RAINFALL AMOUNTS
OBSERVED AND AVERAGE TEMPERATURE DEPARTURES BETWEEN 1 TO 2 DEGREES
ABOVE NORMAL.

THE LOWER THAN NORMAL RAINFALL DURING THE MID TO LATE SPRING
CONTINUED INTO JUNE. THIS DELAYED THE NORMAL START TO THE WET SEASON
OVER THE REGION WHICH USUALLY ARRIVES DURING THE END OF MAY. THIS
DRIER PATTERN EXACERBATED DROUGHT CONDITIONS OVER THE AREA...
ESPECIALLY ACROSS OKEECHOBEE COUNTY AND THE TREASURE COAST. IN
FACT...VERO BEACH AND FORT PIERCE WERE EXPERIENCING THEIR LOWEST
RAINFALL TOTALS FOR THE DRY SEASON ON RECORD. SINCE OCTOBER 1ST OF
2010 BOTH LOCATIONS HAD PRECIPITATION TOTALS THAT WERE AROUND 18 TO
20 INCHES BELOW NORMAL. RELIEF IN DROUGHT CONDITIONS FINALLY BEGAN
IN LATE JUNE AS DEEPER MOISTURE BUILT NORTHWARD FROM THE TROPICS
...LEADING TO HIGHER COVERAGE OF SHOWERS AND STORMS AND THE
BEGINNING OF THE WET SEASON OVER THE AREA. THIS WAS THE SECOND
LATEST START TO THE WET SEASON ON RECORD...ONLY FALLING BEHIND 1998
WHEN IT WAS DELAYED INTO EARLY JULY.

JULY-SEPTEMBER...
THE PLACEMENT OF THE ATLANTIC HIGH PRESSURE RIDGE WAS THE MAIN
FEATURE TO DOMINATE WEATHER CONDITIONS INTO THE SUMMER AND EARLY
FALL. THE MEAN PLACEMENT OF THE RIDGE REMAINED OVER CENTRAL FLORIDA
FROM JULY INTO AUGUST WITH MUCH OF THE SEA BREEZE INDUCED AFTERNOON
SHOWER AND THUNDERSTORM ACTIVITY CONCENTRATED OVER THE INTERIOR.
HURRICANE IRENE FOCUSED MORE RAINFALL ALONG THE COAST LATE IN AUGUST
AS OUTER RAINBANDS FROM THE SYSTEM MOVED ONSHORE. MUCH OF THE AREA
RECEIVED RAINFALL NEAR SEASONAL NORMALS BY THE END OF THE
SUMMER...DESPITE THE LATE START TO THE WET SEASON. THIS PRECIP
CONTINUED TO HELP ALLEVIATE SIGNIFICANT DROUGHT CONDITIONS.
TEMPERATURES ALSO REMAINED NEAR TO ABOVE NORMAL THROUGH THE REST OF
THE SUMMER. AUGUST AS WELL AS THE SUMMER OVERALL WAS ONE OF THE
HOTTEST ON RECORD ACROSS THE AREA...BOTH RANKING IN THE TOP 10 FOR
ALL CLIMATE SITES. MOST NOTABLE WAS VERO BEACH WHICH HAD ITS HOTTEST
AUGUST ON RECORD...BEATING ITS PREVIOUS STANDING RECORD SET IN
2010.

COLD FRONTS BEGAN TO PUSH THROUGH THE AREA AGAIN INTO SEPTEMBER BUT
WERE WEAK WITH TEMPERATURES REMAINING NEAR TO SLIGHTLY ABOVE NORMAL.
A FRONTAL BOUNDARY THAT LINGERED OVER THE AREA EARLY IN THE MONTH
BROUGHT SIGNIFICANT RAINFALL AMOUNTS TO THE AREA THAT FINALLY PUT AN
END TO ANY LINGERING DROUGHT CONDITIONS OVER THE REGION. DRIER THAN
NORMAL CONDITIONS THEN RETURNED INTO THE LATTER HALF OF SEPTEMBER
AND ALLOWED FOR BELOW NORMAL RAINFALL AMOUNTS OVERALL FOR SEPTEMBER
FOR MANY LOCATIONS.

OCTOBER-DECEMBER...
THE PASSAGE OF STRONGER COLD FRONTS AND A MORE DISTURBED WEATHER
PATTERN IN OCTOBER BROUGHT COOLER AND WETTER CONDITIONS TO THE AREA.
A SIGNIFICANT HEAVY RAINFALL EVENT OCCURRED FROM THE 7TH-9TH WITH
WIDESPREAD RAINFALL AMOUNTS UP TO 6-10 INCHES AND LOCALLY HEAVIER
AMOUNTS UP TO 12-17 INCHES OCCURRING IN SOUTHERN OSCEOLA COUNTY AND
NEAR PALM BAY AND VERO BEACH. THIS EVENT BEGAN INITIALLY AS STRONG
ONSHORE FLOW COMBINED WITH DEEP MOISTURE TO PRODUCE A LARGE AREA OF
HEAVY RAINFALL INTO THE WEEKEND. RAINFALL WAS THEN REINFORCED AS A
GALE FORCE LOW DEVELOPED JUST OFFSHORE OF THE FLORIDA EAST COAST AND
MOVED ONSHORE NEAR CAPE CANAVERAL. THIS SYSTEM ALSO PRODUCED MINOR
WIND DAMAGE AS IT GENERATED SUSTAINED WINDS OF 40-50 MPH AND GUSTS
AS HIGH AS 75-80 MPH ACROSS PORTIONS OF THE EAST CENTRAL FLORIDA
COAST. THE RAINFALL FROM THIS EVENT PUT AN END TO ANY SIGNIFICANT
LINGERING PRECIPITATION DEFICITS SINCE THE BEGINNING OF THE YEAR AND
ALSO BROUGHT AREA RIVERS TO BANKFULL WITH MINOR FLOODING REPORTED IN
A FEW LOCATIONS.

ADDITIONAL HEAVY RAINFALL EVENTS OCCURRED DURING THE MONTH OF
OCTOBER WITH EVEN A FEW EF-0 TORNADOES IMPACTING EAST CENTRAL
FLORIDA. A DRIER AIRMASS THAT BUILT INTO THE AREA BEHIND AN EXITING
COLD FRONT ON THE 20TH OF THE MONTH SIGNALED THE BEGINNING OF THE
DRY SEASON...DESPITE ONE FINAL HEAVY RAIN EVENT IN LATE OCTOBER.
RAINFALL AMOUNTS DURING THE MONTH WERE AROUND 200-300 PERCENT OF
NORMAL AND ALSO LED TO THE WETTEST OCTOBER ON RECORD FOR VERO BEACH
AS IT CAME IN WITH A STAGGERING TOTAL OF 21.93 INCHES.

ABOVE NORMAL TEMPERATURES AND GENERAL DRIER THAN NORMAL CONDITIONS
RETURNED INTO NOVEMBER AND PERSISTED THROUGH THE REST OF THE YEAR.
ONE EXCEPTION WAS ALONG THE TREASURE COAST WHERE ONSHORE MOVING
SHOWER ACTIVITY IN NOVEMBER AND A HEAVY RAINFALL EVENT IN EARLY
DECEMBER BROUGHT HIGHER RAINFALL TOTALS TO THIS AREA. ONE OF THE
MORE INTERESTING WEATHER STORIES OF 2011 WAS THE FACT THAT VERO
BEACH WAS EXPERIENCING SOME OF THE DRIEST CONDITIONS ACROSS THE AREA
INTO EARLY SUMMER...THEN BOUNCED BACK TO HAVE ONE OF THE HIGHEST
RAINFALL TOTALS THIS YEAR AMONG EAST CENTRAL FLORIDA OBSERVING
LOCATIONS. THIS WAS MOSTLY DUE TO THE RAINFALL TOTALS IN THE LAST
THREE MONTHS OF THE YEAR FOR THIS SITE.

.END OF YEAR STATISTICS...

TEMPERATURES...

AVERAGE TEMPERATURE VALUES FOR 2011 AT THE FOUR MAIN CLIMATE SITES
ACROSS EAST CENTRAL FLORIDA ARE AS FOLLOWS (RANKINGS PROVIDED IF IN
THE TOP 10):

-DAYTONA BEACH HAD AN AVERAGE TEMPERATURE FOR THE YEAR OF 71.8
DEGREES FAHRENHEIT WHICH WAS 0.9 DEGREES ABOVE NORMAL. THIS TIED
2009, 2008, AND 1994 AS THE 10TH WARMEST YEAR ON RECORD FOR THIS
SITE.

-ORLANDO HAD AN AVERAGE TEMPERATURE FOR THE YEAR OF 73.9 DEGREES
FAHRENHEIT WHICH WAS 1.1 DEGREES ABOVE NORMAL. THIS TIED 1998 AND
1921 AS THE 5TH WARMEST YEAR ON RECORD FOR THIS SITE.

-MELBOURNE HAD AN AVERAGE TEMPERATURE FOR THE YEAR OF 74.1 DEGREES
FAHRENHEIT WHICH WAS 1.7 DEGREES ABOVE NORMAL. THIS TIED 1990 AS THE
3RD WARMEST YEAR ON RECORD FOR THIS SITE.

-VERO BEACH HAD AN AVERAGE TEMPERATURE FOR THE YEAR OF 74.2 DEGREES
FAHRENHEIT WHICH WAS 1.1 DEGREES ABOVE NORMAL. THIS RANKED AS THE
6TH WARMEST YEAR ON RECORD FOR THIS SITE.

.RAINFALL...

2011 RAINFALL TOTALS FOR THE FOUR MAIN CLIMATE SITES ACROSS EAST
CENTRAL FLORIDA ARE AS FOLLOWS (RANKINGS PROVIDED IF IN THE TOP 10):

-DAYTONA BEACH RECEIVED 48.71 INCHES OF RAINFALL IN 2011 WHICH WAS
0.91 INCHES BELOW NORMAL.

-ORLANDO RECEIVED 56.88 INCHES OF RAINFALL IN 2011 WHICH WAS 6.15
INCHES ABOVE NORMAL.

-MELBOURNE RECEIVED 45.13 INCHES OF RAINFALL IN 2011 WHICH WAS 6.87
INCHES BELOW NORMAL.

-VERO BEACH RECEIVED 64.13 INCHES OF RAINFALL IN 2011 WHICH WAS
12.26 INCHES ABOVE NORMAL.

BELOW IS A LIST OF OBSERVED PRECIPITATION TOTALS AND RAINFALL
STATISTICS FOR SELECT SITES ACROSS EAST CENTRAL FLORIDA FOR THE 2011
SUMMER SEASON:

STATION            2011         30 YEAR   DEPARTURE     PERCENT OF
                 RAINFALL       NORMAL   FROM NORMAL      NORMAL

DAYTONA BEACH     48.71"        49.62"      -0.91"          98%
(DAB)
ORLANDO           56.88"        50.73"       6.15"         112%
(MCO)
MELBOURNE         45.13"        52.00"      -6.87"          87%
(MLB)
VERO BEACH        64.13"        51.87"      12.26"         124%
(VRB)
CLERMONT          47.12"        50.63"      -3.51"          93%
(CLRF1)
DELAND            46.44"        58.04"     -11.60"          80%
(DELF1)
SANFORD           48.23"        53.04"      -4.81"          91%
(SFNF1)
TITUSVILLE        56.08"        53.99"       2.09"         104%
(TITF1)
FORT PIERCE       50.39"        53.84"      -3.45"          94%
(FPCF1)

FOR MORE LOCAL CLIMATE INFORMATION...PLEASE VISIT OUR WEB PAGE AT
HTTP://WEATHER.GOV/MELBOURNE AND CLICK ON THE "LOCAL" LINK UNDER THE
CLIMATE SUBSECTION ON THE LEFT SIDE OF THE PAGE.

$$

WEITLICH

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