000
NOUS42 KMLB 030344
PNSMLB
FLZ041-044>047-053-054-058-059-064-141-144-147-040000-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1044 PM EST WED MAR 2 2011

...OVERALL THE 2010-2011 WINTER SEASON ENDED UP BELOW NORMAL IN BOTH
TEMPERATURES AND PRECIPITATION ACROSS EAST CENTRAL FLORIDA...

FROM AN EXTREMELY COLD START TO THE WINTER...TEMPERATURES GRADUALLY
CLIMBED INTO THE NEW YEAR WITH WARMER WEATHER EXPERIENCED IN
FEBRUARY. THE RECORD COLD TEMPERATURES EXPERIENCED DURING DECEMBER
HOWEVER LED TO BELOW NORMAL TEMPERATURES OVERALL ACROSS THE AREA
FOR THE SEASON. DRIER THAN NORMAL CONDITIONS PERSISTED FOR MUCH OF
THE WINTER WITH ONLY SOME RELIEF PROVIDED DURING THE MONTH OF
JANUARY AS SEVERAL RAIN BANDS BROUGHT NEAR TO ABOVE NORMAL RAINFALL
INTO CENTRAL FLORIDA. DESPITE THIS PERIOD OF RAINY WEATHER...BELOW
NORMAL RAINFALL WAS OBSERVED OVERALL FOR THE SEASON. THIS HAS
ALLOWED SEVERE TO EXTREME DROUGHT CONDITIONS TO PERSIST.

.TEMPERATURES...

SEVERAL STRONG COLD FRONTS PUSHED THROUGH THE AREA IN DECEMBER
BRINGING IN SIGNIFICANTLY COLDER TEMPERATURES AND ALLOWING FOR A FEW
FREEZE AND HARD FREEZE EVENTS TO OCCUR DURING THE MONTH. THERE WERE
SEVERAL DAYS WHERE AVERAGE TEMPERATURE DEPARTURES REACHED 15 TO 25
DEGREES BELOW NORMAL. OVERALL...MONTHLY AVERAGE TEMPERATURE
DEPARTURES FOR DECEMBER WERE AROUND 10 DEGREES BELOW NORMAL. THESE
VALUES SET THE MONTH AS THE COLDEST DECEMBER ON RECORD FOR ALL
OBSERVING SITES IN EAST CENTRAL FLORIDA...SHATTERING PREVIOUS
RECORDS BY A WHOLE 2 TO 4 DEGREES.

SEVERAL STORM SYSTEMS AND COLD FRONTS MOVED SOUTHWARD OVER THE AREA
AGAIN IN JANUARY...HOWEVER THE COLD AIR OUTBREAKS WERE NOT AS SEVERE
AS IN DECEMBER. STILL...MONTHLY AVERAGE TEMPERATURE DEPARTURES
REMAINED BELOW NORMAL BY 1 TO 3 DEGREES. THE WEATHER PATTERN CHANGED
IN FEBRUARY...ESPECIALLY TOWARD THE END OF THE MONTH WHEN HIGH
PRESSURE RIDGING DOMINATED OVER THE SOUTHEAST UNITED STATES AND
ALLOWED TEMPERATURES TO CLIMB TO ABOVE NORMAL VALUES. FEBRUARY
AVERAGE TEMPERATURE DEPARTURES FOR MOST SITES WERE AROUND 2 TO 5
DEGREES WARMER THAN NORMAL.

LA NINA CONDITIONS PRESENT OVER THE EQUATORIAL PACIFIC WATERS
TYPICALLY BRING SLIGHTLY WARMER THAN NORMAL TEMPERATURES DURING THE
WINTER SEASON ACROSS FLORIDA. HOWEVER A STRONG NEGATIVE PHASE OF THE
ARCTIC OSCILLATION DOMINATED THE WEATHER PATTERN THROUGH DECEMBER
INTO JANUARY. THIS PHASE USUALLY ALLOWS FOR A HIGHER FREQUENCY OF
COLD AIR OUTBREAKS ACROSS THE CENTRAL AND EASTERN UNITED STATES
WHICH LED TO THE WELL BELOW NORMAL TEMPERATURES DURING THE FIRST
HALF OF THE SEASON. AS THE ARCTIC OSCILLATION SWITCHED TO ITS
POSITIVE PHASE BY FEBRUARY...THE INFLUENCE OF LA NINA INCREASED AND
WARMER AIR MOVED INTO THE REGION.

DESPITE THIS WARM UP IN FEBRUARY...THE COLDER CONDITIONS EXPERIENCED
EARLIER IN THE SEASON LED TO OVERALL TEMPERATURE DEPARTURES OF 1 TO
4 DEGREES BELOW NORMAL FOR THE 2010-2011 WINTER.

THE AVERAGE TEMPERATURE VALUES FOR THE 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 SEASONAL TEMPERATURE OF 56.0 DEGREES
FAHRENHEIT WHICH WAS 3.7 DEGREES BELOW NORMAL. THIS VALUE TIED THE
WINTERS OF 1960-1961 AND 1963-1964 FOR THE 6TH COLDEST WINTER ON
RECORD FOR THIS SITE.

-ORLANDO HAD AN AVERAGE SEASONAL TEMPERATURE OF 59.2 DEGREES
FAHRENHEIT WHICH WAS 3.0 DEGREES BELOW NORMAL.

-MELBOURNE HAD AN AVERAGE SEASONAL TEMPERATURE OF 60.7 DEGREES
FAHRENHEIT WHICH WAS 1.3 DEGREES BELOW NORMAL.

-VERO BEACH HAD AN AVERAGE SEASONAL TEMPERATURE OF 60.0 DEGREES
FAHRENHEIT WHICH WAS 3.9 DEGREES BELOW NORMAL. THIS IS THE 6TH
COLDEST WINTER ON RECORD FOR THIS SITE.


.RAINFALL...

THE STRONG COLD FRONTS THAT CROSSED FLORIDA IN DECEMBER BROUGHT
LITTLE IN THE WAY OF RAINFALL ACROSS THE AREA WITH RAINFALL DEFICITS
1 TO 2 INCHES BELOW NORMAL FOR THE MONTH. A MORE ACTIVE SOUTHERN
BRANCH OF THE JET STREAM IN JANUARY HOWEVER TRANSPORTED MORE
MOISTURE RICH STORM SYSTEMS OVER THE REGION. THE RAIN BANDS
ASSOCIATED WITH THESE SYSTEMS THAT CROSSED THE AREA DURING THE
LATTER HALF OF JANUARY BROUGHT THE BULK OF THE RAINFALL WITH MOST
LOCATIONS OBSERVING NEAR TO ABOVE NORMAL PRECIPITATION. WEAKER
FRONTAL PASSAGES AND THE EMERGENCE OF HIGH PRESSURE RIDGING INTO
FEBRUARY ALLOWED FOR A DRIER WEATHER PATTERN TO RETURN TO FLORIDA.
MOSTLY MEAGER RAINFALL AMOUNTS WERE OBSERVED AND RESULTED IN
RAINFALL DEPARTURES OF 1-3 INCHES BELOW NORMAL FOR THE MONTH.

DESPITE THE BRIEF PERIOD OF MORE HEALTHY RAINFALL AMOUNTS IN
JANUARY...THE GENERAL LACK OF PRECIPITATION LED TO BELOW NORMAL
RAINFALL FOR THE SEASON. THESE DRIER THAN NORMAL CONDITIONS
TYPICALLY OCCUR DURING TIMES OF LA NINA THROUGH WINTER OVER
FLORIDA.

THE OVERALL 2010-2011 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 5.95 INCHES OF RAINFALL WHICH WAS 2.63
INCHES BELOW NORMAL.

-ORLANDO RECEIVED 6.95 INCHES OF RAINFALL WHICH WAS 0.14 INCHES
BELOW NORMAL.

-MELBOURNE RECEIVED 6.25 INCHES OF RAINFALL WHICH WAS 1.03 INCHES
BELOW NORMAL.

-VERO BEACH RECEIVED 3.91 INCHES OF RAINFALL WHICH WAS 3.62 INCHES
BELOW NORMAL.

BELOW IS A LIST OF OBSERVED PRECIPITATION TOTALS AND RAINFALL
STATISTICS FOR SELECT SITES ACROSS EAST CENTRAL FLORIDA FOR THE
2010-2011 WINTER SEASON:

STATION       WINTER 2010-2011  30 YEAR   DEPARTURE     PERCENT OF
                  RAINFALL      NORMAL    FROM NORMAL     NORMAL

DAYTONA BEACH      5.95"         8.58"      -2.63"          69%
(DAB)
ORLANDO            6.95"         7.09"      -0.14"          98%
(MCO)
MELBOURNE          6.25"         7.28"      -1.03"          86%
(MLB)
VERO BEACH         3.91"         7.53"      -3.62"          52%
(VRB)
CLERMONT           7.16"         8.09"      -0.93"          89%
(CLRF1)
DELAND             7.33"         8.96"      -1.63"          82%
(DELF1)
SANFORD            5.58"         8.37"      -2.79"          67%
(SFNF1)
TITUSVILLE         5.33"         7.79"      -5.13"          36%
(TITF1)
FORT PIERCE        3.22"         7.97"      -4.75"          40%
(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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