PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
324 PM EST FRI MAR 9 2012

...2011-2012 WINTER SEASON WAS WARMER AND DRIER THAN NORMAL ACROSS
EAST CENTRAL FLORIDA...

DESPITE A FEW STRONG COLD FRONTS CROSSING THE AREA THIS WINTER...
TEMPERATURES THROUGH MUCH OF THE SEASON HAVE REMAINED NEAR TO ABOVE
NORMAL. LIMITED MOISTURE WITH MANY OF THE FRONTAL SYSTEMS TO CROSS
THE REGION HAVE LED TO A GENERAL LACK OF RAINFALL AND DRIER THAN
NORMAL CONDITIONS OVER EAST CENTRAL FLORIDA.

.TEMPERATURES...

HIGH PRESSURE OVER THE EASTERN UNITED STATES DOMINATED THE WEATHER
PATTERN FOR MUCH OF DECEMBER. ANY COOL DOWNS FROM FRONTAL PASSAGES
WERE SHORT LIVED AS ONSHORE FLOW QUICKLY REDEVELOPED OVER THE REGION
AND INCREASED TEMPERATURES. A COUPLE STRONGER COLD FRONTS CROSSED
CENTRAL FLORIDA DURING THE FIRST HALF OF JANUARY. WELL BELOW NORMAL
HIGHS AND NEAR TO BELOW FREEZING NIGHTTIME TEMPERATURES OCCURRED
WITHIN THE FIRST COUPLE OF DAYS AFTER THESE FRONTAL PASSAGES.
OTHERWISE DURING THE LATTER HALF OF JANUARY NEAR TO ABOVE NORMAL
TEMPERATURES OCCURRED AS FRONTAL BOUNDARIES THAT MOVED THROUGH THE
AREA WERE RATHER WEAK. FEBRUARY CONTINUED A WARMER THAN NORMAL TREND
FOR THE MOST PART WITH ONLY ONE SIGNIFICANT COLD SPELL OCCURRING
DURING THE MIDDLE PART OF THE MONTH AFTER AN ARCTIC AIR MASS MOVED
INTO THE AREA BEHIND A STRONG COLD FRONT.

DESPITE THESE BRIEF COLDER PERIODS DURING THE WINTER...OVERALL
AVERAGE TEMPERATURES FOR THE SEASON WERE WELL ABOVE NORMAL. THESE
WARMER CONDITIONS WERE DUE TO TWO MAIN FACTORS:

1)A MAINLY POSITIVE PHASE OF THE ARCTIC OSCILLATION THROUGH THE
WINTER...WHICH RESULTS IN FEWER ARCTIC OUTBREAKS OVER THE EASTERN
UNITED STATES.

2)PERSISTING LA NINA CONDITIONS (COOLER THAN NORMAL SEA SURFACE
TEMPERATURES) OVER THE EQUATORIAL PACIFIC WATERS THAT TYPICALLY
SHIFT THE JET STREAM AND COLDER TEMPERATURES WELL NORTH OF THE
AREA.

THE AVERAGE TEMPERATURE VALUES FOR THE 2011-2012 WINTER SEASON 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 WINTER SEASON TEMPERATURE OF 62.7
DEGREES FAHRENHEIT WHICH WAS 3.2 DEGREES ABOVE NORMAL.

-ORLANDO HAD AN AVERAGE WINTER SEASON TEMPERATURE OF 64.3 DEGREES
FAHRENHEIT WHICH WAS 2.4 DEGREE ABOVE NORMAL.

-MELBOURNE HAD AN AVERAGE WINTER SEASON TEMPERATURE OF 65.4 DEGREES
FAHRENHEIT WHICH WAS 3.4 DEGREES ABOVE NORMAL. THIS RANKED AS THE
8TH WARMEST WINTER ON RECORD FOR THIS SITE.

-VERO BEACH HAD AN AVERAGE WINTER SEASON TEMPERATURE OF 66.4 DEGREES
FAHRENHEIT WHICH WAS 2.8 DEGREES ABOVE NORMAL. THIS RANKED AS THE
7TH WARMEST WINTER ON RECORD FOR THIS SITE.

.RAINFALL...

RAINFALL DURING DECEMBER WAS MAINLY CONCENTRATED ALONG THE COAST DUE
TO ONSHORE MOVING SHOWER ACTIVITY. ALSO...HEAVY RAINFALL AND MINOR
FLOODING OCCURRED ALONG THE SOUTHERN TREASURE COAST ON THE 10TH OF
THE MONTH DUE TO PERSISTENT SHOWERS ALONG A LINGERING FRONTAL
BOUNDARY. RAINFALL AMOUNTS OVER THE INTERIOR WERE WELL BELOW NORMAL
FOR DECEMBER WITH NEAR TO ABOVE NORMAL RAINFALL FALLING OVER MUCH OF
THE COAST. INTO THE NEW YEAR MOISTURE REMAINED LIMITED ALONG FRONTS
THAT MOVED THROUGH THE AREA WITH LITTLE TO NO RAINFALL OCCURRING
OVER MUCH OF EAST CENTRAL FLORIDA. THIS LED TO THE DRIEST JANUARY ON
RECORD FOR MANY CLIMATE SITES ACROSS THE REGION. IN FACT MELBOURNE
AND VERO BEACH DID NOT RECEIVE ANY MEASURABLE RAINFALL DURING THE
ENTIRE MONTH. THESE "DRY STREAKS" FOR BOTH SITES ENDED IN EARLY
FEBRUARY...BECOMING THE SECOND LONGEST STRETCHES WITHOUT MEASURABLE
RAINFALL ON RECORD FOR BOTH LOCATIONS. BELOW NORMAL RAINFALL
GENERALLY PERSISTED THROUGH THE REST OF THE WINTER UNTIL THE END OF
FEBRUARY WHEN HIGHER PRECIPITATION AMOUNTS OCCURRED.

MUCH OF EAST CENTRAL FLORIDA HAD RAINFALL DEPARTURES FOR THE WINTER
SEASON THAT WERE 3 TO 4 INCHES BELOW NORMAL OR ROUGHLY 50-60 PERCENT
OF NORMAL. THIS LACK OF PRECIPITATION WAS MAINLY DUE TO LA NINA
CONDITIONS OVER THE EQUATORIAL PACIFIC WATERS WHICH SHIFTED THE JET
STREAM FARTHER NORTH OF FLORIDA AND LED TO FEWER STORM SYSTEMS
CROSSING THE AREA.

THE 2011-2012 WINTER SEASON 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 4.88 INCHES OF RAINFALL THIS WINTER SEASON
WHICH WAS 3.27 INCHES BELOW NORMAL.

-ORLANDO RECEIVED 4.07 INCHES OF RAINFALL THIS WINTER SEASON WHICH
WAS 3.24 INCHES BELOW NORMAL.

-MELBOURNE RECEIVED 4.57 INCHES OF RAINFALL THIS WINTER SEASON WHICH
WAS 2.80 INCHES BELOW NORMAL.

-VERO BEACH RECEIVED 6.09 INCHES OF RAINFALL THIS WINTER SEASON
WHICH WAS 1.27 INCHES BELOW NORMAL.

BELOW IS A LIST OF OBSERVED PRECIPITATION TOTALS AND RAINFALL
STATISTICS FOR SELECT SITES ACROSS EAST CENTRAL FLORIDA FOR THE
2011-2012 WINTER SEASON:

STATION     WINTER 2011-2012    30 YEAR    DEPARTURE     PERCENT OF
                RAINFALL        NORMAL    FROM NORMAL      NORMAL

DAYTONA BEACH      4.88"         8.15"      -3.27"          60%
(DAB)
ORLANDO            4.07"         7.31"      -3.24"          56%
(MCO)
MELBOURNE          4.57"         7.37"      -2.80"          62%
(MLB)
VERO BEACH         6.09"         7.36"      -1.27"          83%
(VRB)
CLERMONT           1.44"         8.41"      -6.97"          17%
(CLRF1)
DELAND             5.58"         8.82"      -3.24"          63%
(DELF1)
SANFORD            3.54"         8.30"      -4.76"          43%
(SFNF1)
TITUSVILLE         3.27"         8.14"      -4.87"          40%
(TITF1)
FORT PIERCE        5.72"         7.57"      -1.85"          76%
(FPCF1)
STUART             8.09"         8.83"      -0.74"          92%
(STRF1)
OKEECHOBEE         1.99"         6.12"      -4.13"          33%
(OKIF1)

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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