NOUS42 KMLB 011549
PNSMLB
FLZ041-044>047-053-054-058-059-064-141-144-147-020000-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1050 AM EST SAT JAN 1 2011

...2010 WAS A YEAR OF EXTREMES FOR EAST CENTRAL FLORIDA...
...BELOW NORMAL TEMPERATURES AND RAINFALL WERE EXPERIENCED OVERALL 
ACROSS THE AREA THIS PAST YEAR...

FROM ONE OF THE COLDEST STARTS TO THE YEAR ON RECORD TO ONE OF THE 
HOTTEST SUMMERS AND THEN BACK TO A RECORD COLD DECEMBER...AVERAGE 
TEMPERATURES VARIED WIDELY ACROSS EAST CENTRAL FLORIDA THROUGH THE 
YEAR. STORMS SYSTEMS THAT MOVED THROUGH THE AREA DURING THE FIRST 
FEW MONTHS OF 2010 KEPT PLENTY OF RAINFALL ACROSS THE AREA. 
HOWEVER...A BELOW NORMAL WET SEASON AND GENERAL LACK OF PERSISTENT 
WIDESPREAD RAINFALL INTO THE END OF THE YEAR ALLOWED FOR SEVERE TO 
EXTREME DROUGHT CONDITIONS TO DEVELOP...ESPECIALLY ALONG THE 
COAST.      

.TEMPERATURES...

JANUARY-APRIL...

THE VERY FIRST DAY OF THE NEW YEAR SET THE STAGE FOR WHAT BECAME ONE 
OF THE COLDEST BEGINNINGS TO THE YEAR ACROSS EAST CENTRAL FLORIDA ON 
RECORD. A STRONG COLD FRONT MOVED THROUGH THE AREA ON THE 1ST OF 
JANUARY AND USHERED IN WELL BELOW NORMAL TEMPERATURES INTO THE 
STATE. THIS COLD AIRMASS WAS THEN REINFORCED INTO THE MIDDLE OF THE 
MONTH. CLIMATE SITES ACROSS THE REGION EITHER TIED OR BROKE THE 
GREATEST NUMBER OF CONSECUTIVE DAYS THE HIGH TEMPERATURE REMAINED AT 
OR BELOW 60 DEGREES AND SEVERAL NIGHTS OF AT OR BELOW FREEZING 
TEMPERATURES WERE REPORTED.

DESPITE A BRIEF WARM UP FROM THE LATTER HALF OF JANUARY INTO EARLY 
FEBRUARY...UNSEASONABLY COLD TEMPERATURES RETURNED FOR MUCH OF THE 
REST OF FEBRUARY AND INTO MARCH. AVERAGE TEMPERATURE DEPARTURES OF 
10 TO 15 DEGREES BELOW NORMAL WERE COMMONPLACE MOST DAYS FROM THE 
SECOND WEEK OF FEBRUARY INTO EARLY MARCH. THE REST OF MARCH REMAINED 
BELOW NORMAL BUT WAS NOT AS EXTREME. THE COMBINATION OF COLD WEATHER 
FROM JANUARY TO MARCH MADE FOR THE COLDEST OR IN THE TOP 3 COLDEST 
STARTS TO THE YEAR ON RECORD FOR DAYTONA BEACH...ORLANDO...MELBOURNE 
AND VERO BEACH.     

TOP 5 COLDEST JANUARY-MARCH AVERAGE TEMPERATURE RANKINGS IN DEGREES 
FAHRENHEIT AND YEAR SET:

  DAYTONA           ORLANDO       MELBOURNE     VERO BEACH
1. 54.9  1958   1. 56.4  1958  1. 57.5  2010  1. 58.0  2010 
2. 55.5  1940   2. 56.7  2010  2. 58.8  1968  2. 59.5  1958
3. 55.6  2010   3. 58.5  1968  3. 59.1  1981  3. 59.8  1978
4. 56.0  1981   4. 58.9  1981  4. 59.7  1969  4. 59.9  1981
5. 56.2  1978   5. 59.3  1977  5. 59.8  1970  5. 60.2  1968

A COMBINATION OF ONGOING EL NINO CONDITIONS OVER THE EQUATORIAL 
PACIFIC OCEAN WATERS (WHICH DEVELOPED EARLIER IN 2009) AND A STRONG 
NEGATIVE PHASE OF THE NORTH ATLANTIC OSCILLATION WERE THE MAIN 
CONTRIBUTING FACTORS TO THESE WELL BELOW NORMAL TEMPERATURES. STRONG 
FRONTAL PASSAGES BECAME LESS FREQUENT IN APRIL AS EL NINO CONDITIONS 
AND ITS TYPICAL INFLUENCE OVER THE AREA BEGAN TO WANE. THIS ALLOWED 
TEMPERATURES TO RETURN TO NEAR NORMAL VALUES FOR THE MONTH...FINALLY 
ENDING THE STREAK OF UNSEASONABLY COLD TEMPERATURES. 

MAY-AUGUST...
     
A WARMING TREND CONTINUED IN MAY AS COLD FRONTAL PASSAGES BECAME 
LESS FREQUENT WITH AVERAGE TEMPERATURE DEPARTURES NEAR TO ABOVE 
NORMAL FOR MUCH OF THE MONTH. IN FACT CLIMATE SITES ACROSS THE AREA 
OBSERVED MONTHLY AVERAGE TEMPERATURES THAT RANKED IN THE TOP TEN 
WARMEST MAYS EVER RECORDED. THE SUMMER MONTHS CONTINUED UNSEASONABLY 
WARM TEMPERATURES AS WELL AS A HIGH PRESSURE RIDGE ALOFT BECAME MORE 
DOMINANT OVER THE SOUTHEASTERN UNITED STATES. HOWEVER IT WAS THE 
NIGHTTIME LOWS AND NOT SO MUCH THE DAYTIME HIGHS THAT CONTRIBUTED TO 
THE OVERALL ABOVE NORMAL AVERAGE TEMPERATURE DEPARTURES. FROM JUNE 
TO AUGUST...ALL MAJOR CLIMATE SITES IN THE AREA HAD EITHER THE 
WARMEST OR SECOND WARMEST SUMMER ON RECORD IN RESPECT TO THE OVERALL 
AVERAGE TEMPERATURE VALUE FOR THE SEASON.

TOP 5 HOTTEST SUMMER (JUN-AUG) AVERAGE TEMPERATURE RANKINGS IN 
DEGREES FAHRENHEIT AND LAST YEAR SET:

   DAYTONA          ORLANDO       MELBOURNE     VERO BEACH  
 1. 83.5  1998   1. 84.1  1998  1. 84.0  1998  1. 83.1  2010 
 2. 83.0  2010   2. 83.8  2010* 2. 83.5  2010  2. 82.7  1998
 3. 82.5  1977   3. 83.4  2005  3. 82.6  2007  3. 82.5  2005
 4. 82.3  2007   4. 83.3  1981  4. 82.3  1942  4. 82.3  1997
 5. 82.1  1981   5. 83.2  1969  5. 82.1  2009  5. 82.1  1952 

*TIED 1987

THESE WELL ABOVE NORMAL SUMMER TEMPERATURES MADE FOR ONE OF THE 
LARGEST SWINGS IN AVERAGE TEMPERATURES FROM THE BEGINNING TO MIDDLE 
OF THE YEAR...ONLY SURPASSED BY 1981 OR 1977. 

TOP 3 LARGEST AVERAGE TEMPERATURE CHANGES BETWEEN JANUARY AND JULY 
IN DEGREES FAHRENHEIT AND YEAR SET:

   DAYTONA          ORLANDO       MELBOURNE     VERO BEACH  
 1. 34.0  1981   1. 32.8  1981  1. 30.4  1981  1. 29.8  1981 
 2. 32.1  1977   2. 31.4  1977  2. 28.6  2010  2. 27.2  2010
 3. 30.0  2010   3. 29.6  2010  3. 27.5  1977  3. 26.4  1977

SEPTEMBER-DECEMBER...

THE WARMER THAN NORMAL TREND CONTINUED INTO SEPTEMBER WITH MONTHLY 
AVERAGE TEMPERATURE DEPARTURE VALUES AROUND 1 TO 2 DEGREES ABOVE 
NORMAL...RANKING SEPTEMBER WITHIN THE TOP 10 WARMEST ON RECORD. 
HOWEVER BY OCTOBER...THE REEMERGENCE OF SLIGHTLY STRONGER COOL 
FRONTS BROUGHT SOME RELIEF TO THE WARM PATTERN THAT HAD BEEN IN 
PLACE...MAINLY DURING THE EARLY AND MIDDLE PART OF THE MONTH. THIS 
ALLOWED OCTOBER TO COME OUT SLIGHTLY BELOW NORMAL OVERALL...AVERAGE 
TEMPERATURE-WISE. A STRONG COLD FRONT BROUGHT WELL BELOW NORMAL 
TEMPERATURES IN THE FIRST HALF OF NOVEMBER...WHILE TOWARDS THE END 
OF NOVEMBER MORE ABOVE NORMAL TEMPERATURES WERE OBSERVED. HOWEVER 
OVERALL MONTHLY AVERAGE TEMPERATURE VALUES ONCE AGAIN TURNED OUT 
SLIGHTLY BELOW NORMAL FOR THE SECOND MONTH IN A ROW.

BIG CHANGES CAME IN THE MONTH OF DECEMBER AS SEVERAL STRONG FRONTAL 
BOUNDARIES MOVED INTO THE AREA AND BROUGHT WELL BELOW NORMAL 
TEMPERATURES FOR MUCH OF THE MONTH. THESE COLD AIR OUTBREAKS WERE 
ONCE AGAIN FUELED BY A PERSISTENT NEGATIVE PHASE OF THE NORTH 
ATLANTIC OSCILLATION THAT DEVELOPED DURING THIS PERIOD. THREE 
SEPARATE FREEZE EVENTS OCCURRED DURING THE MONTH WITH ONE OF THE 
EARLIEST HARD FREEZES ON RECORD (MINIMUM TEMPERATURES BELOW 28 
DEGREES) IMPACTING THE AREA ON THE 14TH AND AGAIN ON THE 15TH. THE 
OVERALL EFFECT OF THESE WELL BELOW NORMAL TEMPERATURES...LEAD TO THE 
COLDEST DECEMBER ON RECORD FOR ALL CLIMATE SITES OVER EAST CENTRAL 
FLORIDA.  

YEAR END STATISTICS...

DESPITE THE WARMER THAN NORMAL TEMPERATURES THROUGH LATE SPRING INTO 
EARLY FALL...THE ABNORMALLY COLD PERIODS IN EARLY 2010 AND AGAIN IN 
DECEMBER HAD A LARGE INFLUENCE ON AVERAGE TEMPERATURES FOR THE YEAR. 
OVERALL BELOW NORMAL ANNUAL TEMPERATURES WERE EXPERIENCED OVER EAST 
CENTRAL FLORIDA FOR 2010.  

THE OVERALL ANNUAL AVERAGE TEMPERATURE VALUES FOR THE FOUR MAIN 
CLIMATE SITES ACROSS EAST CENTRAL FLORIDA ARE AS FOLLOWS:

-DAYTONA BEACH HAD AN AVERAGE ANNUAL TEMPERATURE OF 69.4 DEGREES 
FAHRENHEIT WHICH WAS 1.5 DEGREES BELOW NORMAL. THIS TIED WITH 1958 
AS THE 8TH COLDEST ANNUAL AVERAGE TEMPERATURE FOR DAYTONA BEACH.

-ORLANDO HAD AN AVERAGE ANNUAL TEMPERATURE OF 70.7 DEGREES 
FAHRENHEIT WHICH WAS 2.1 DEGREES BELOW NORMAL. THIS WAS THE SECOND 
COLDEST ANNUAL AVERAGE TEMPERATURE FOR ORLANDO.

-MELBOURNE HAD AN AVERAGE ANNUAL TEMPERATURE OF 71.1 DEGREES 
FAHRENHEIT WHICH WAS 1.0 DEGREES BELOW NORMAL. THIS WAS THE THIRD 
COLDEST ANNUAL AVERAGE TEMPERATURE FOR MELBOURNE.

-VERO BEACH HAD AN AVERAGE ANNUAL TEMPERATURE OF 71.1 DEGREES 
FAHRENHEIT WHICH WAS 2.1 DEGREES BELOW NORMAL. THIS WAS THE THIRD 
COLDEST ANNUAL AVERAGE TEMPERATURE FOR VERO BEACH.


OTHER CLIMATE STATISTICS THAT PUT THE AMOUNT OF COLD WEATHER 
EXPERIENCED THIS YEAR INTO PERSPECTIVE: 

NUMBER OF DAYS IN 2010 WHEN MAX TEMPERATURE WAS LESS THAN OR 
EQUAL TO 60 DEGREES FAHRENHEIT:

SITE                      DAYS                RECORD (YEAR)

DAYTONA BEACH              42*                  32 (1958)   
ORLANDO                    33*                  26 (1958)
MELBOURNE                  27*                  18 (1977)    
VERO BEACH                 23*                  17 (1958)



NUMBER OF DAYS IN 2010 WHEN MIN TEMPERATURE WAS LESS THAN OR 
EQUAL TO 32 DEGREES FAHRENHEIT:

SITE                      DAYS                RECORD (YEAR)

DAYTONA BEACH              17 (2ND HIGHEST)     22 (1940)   
ORLANDO                    13*                  10 (1977/1981) 
MELBOURNE                  15*                   7 (1977/1981)    
VERO BEACH                 15*                   9 (1981)

*NEW RECORD

.RAINFALL...

JANUARY-APRIL...
THE MIDDLE TO LATTER PART OF THE DRY SEASON...WHICH FOR CENTRAL 
FLORIDA TYPICALLY RUNS FROM MID OCTOBER TO MID MAY...SAW ABOVE 
NORMAL RAINFALL THROUGH THE PERIOD. EL NINO CONDITIONS IN THE 
TROPICAL PACIFIC OCEAN HELPED EXTEND THE SUBTROPICAL JET STREAM OVER 
THE SOUTHERN UNITED STATES...TRANSPORTING SEVERAL STORM SYSTEMS 
ACROSS THE AREA. THESE SYSTEMS DROPPED WIDESPREAD RAINFALL ACROSS 
THE AREA...ESPECIALLY IN MARCH WHEN MOST OBSERVING LOCATIONS 
RECEIVED DOUBLE THE AMOUNT OF NORMAL PRECIPITATION FOR THE MONTH. 

MAY-SEPTEMBER...
AS EL NINO CONDITIONS WEAKENED AND FRONTAL PASSAGES BECAME LESS 
FREQUENT INTO LATE SPRING...RAINFALL ACROSS THE AREA WAS GENERATED 
BY MORE TYPICAL DAILY SEA BREEZE INITIATED CONVECTION. HOWEVER 
THROUGHOUT THE SUMMER AND INTO EARLY FALL...SHOWER AND THUNDERSTORM 
ACTIVITY WAS NOT AS WIDESPREAD AS WHAT IS TYPICALLY OBSERVED. THIS 
LEAD TO BELOW NORMAL PRECIPITATION ACROSS MUCH OF THE AREA EACH 
MONTH. CONTRIBUTING FACTORS TO THE LOWER CONVECTIVE COVERAGE ACROSS 
EAST CENTRAL FLORIDA WAS A MEAN NORTHWARD PLACEMENT OF THE SURFACE 
HIGH PRESSURE RIDGE WHICH CONCENTRATED MORE SHOWER AND THUNDERSTORM 
ACTIVITY TOWARD THE WEST COAST. ALSO...A PERSISTENT UPPER LEVEL 
RIDGE WAS GENERALLY OBSERVED OVER THE SOUTHEAST UNITED STATES AND 
ACTED TO SUPPRESS AFTERNOON CONVECTION MANY DAYS. 

LA NINA CONDITIONS THAT FORMED OVER THE EQUATORIAL PACIFIC WATERS 
DURING THE SUMMER WAS A MAIN CONTRIBUTING FACTOR TO GREATER THAN 
NORMAL ATLANTIC BASIN TROPICAL ACTIVITY DURING THE HURRICANE SEASON. 
HOWEVER MOST OF THESE SYSTEMS (AND THE RAINFALL ASSOCIATED WITH 
THEM) DID NOT IMPACT FLORIDA WHICH ALSO CONTRIBUTED TO BELOW NORMAL 
RAINFALL THROUGH THE WET SEASON. 

OCTOBER-DECEMBER...
AN EARLY START TO THE DRY SEASON...CONTINUED LACK OF IMPACTING 
TROPICAL ACTIVITY AND THE PASSAGE OF RELATIVELY DRY COOL FRONTS INTO 
OCTOBER...LEAD TO LITTLE RAINFALL ACROSS THE AREA. MANY LOCATIONS 
WENT NUMEROUS DAYS WITHOUT MEASURABLE RAINFALL WITH SOME LOCATIONS 
NOT OBSERVING ANY PRECIPITATION AT ALL FOR THE MONTH. THIS LEAD TO 
THE DRIEST OCTOBER ON RECORD FOR ORLANDO...MELBOURNE AND VERO 
BEACH...WHILE DAYTONA BEACH JUST BARELY MISSED THE DRIEST OCTOBER ON 
RECORD COMING IN SECOND. THESE RECORD SETTING DRY CONDITIONS 
COMBINED WITH THE IMPACT OF THE BELOW NORMAL WET SEASON BEGAN TO 
FORM DROUGHT CONDITIONS OVER THE REGION...ESPECIALLY ALONG THE EAST 
COAST WHERE THE GREATEST RAINFALL DEFICITS SINCE MAY WERE 
OBSERVED. 

THE INFLUENCE OF LA NINA...WHICH TYPICALLY BRINGS DRIER THAN NORMAL 
CONDITIONS OVER FLORIDA TOWARDS AND THROUGHOUT THE WINTER SEASON... 
CONTINUED BELOW NORMAL RAINFALL IN NOVEMBER AND DECEMBER. THIS 
EXACERBATED DROUGHT CONDITIONS OVER THE AREA WITH SEVERE TO EXTREME 
DROUGHT CONDITIONS IN PLACE OVER MOST OF EAST CENTRAL FLORIDA BY THE 
END OF THE YEAR.  

YEAR END STATISTICS...

THE DRIER THAN NORMAL CONDITIONS THAT WERE PRESENT OVER THE AREA FOR 
MUCH OF THE YEAR LEAD TO BELOW NORMAL RAINFALL OVERALL FOR MOST 
OBSERVING SITES: 

-DAYTONA BEACH HAD A TOTAL ANNUAL RAINFALL OF 39.39 INCHES WHICH WAS 
9.90 INCHES BELOW NORMAL. THIS IS THE 14TH DRIEST YEAR ON RECORD.

-ORLANDO HAD A TOTAL ANNUAL RAINFALL OF 45.72 INCHES WHICH WAS 2.63 
INCHES BELOW NORMAL. THIS IS THE 22ND DRIEST YEAR ON RECORD.

-MELBOURNE HAD A TOTAL ANNUAL RAINFALL OF 35.71 INCHES WHICH WAS 
12.58 INCHES BELOW NORMAL. THIS IS THE 3RD DRIEST YEAR ON RECORD.

-VERO BEACH HAD A TOTAL ANNUAL RAINFALL OF 37.04 INCHES WHICH WAS 
14.89 INCHES BELOW NORMAL. THIS IS THE 5TH DRIEST YEAR ON RECORD.

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

STATION            2010         30 YEAR   DEPARTURE     PERCENT OF 
                 RAINFALL       NORMAL   FROM NORMAL      NORMAL
                                
DAYTONA BEACH     39.39"        49.29"      -9.90"          80% 
(DAB)
ORLANDO           45.72"        48.35"      -2.63"          95%
(MCO)
MELBOURNE         35.71"        48.29"     -12.58"          74%
(MLB)
VERO BEACH        37.04"        51.93"     -14.89"          71%
(VRB)
CLERMONT          45.63"        49.74"      -4.11"          92% 
(CLRF1)
DELAND            53.78"        52.79"       0.99"         102%
(DELF1)
SANFORD           43.43"        51.31"      -7.88"          85%
(SFNF1)
TITUSVILLE        37.54"        52.79"     -15.25"          71%
(TITF1)
FORT PIERCE       37.31"        53.50"     -16.19"          70%
(FPCF1)
OKEECHOBEE        47.15"        45.66"       1.49"         103% 
(OKEF1)
STUART            56.75"        59.53"      -2.77"          95% 
(STRF1)      


.2010 SEVERE WEATHER SUMMARY...

THERE WERE 4 DEATHS IN EAST CENTRAL FLORIDA IN 2010 ATTRIBUTED TO 
WEATHER RELATED PHENOMENA. TWO PEOPLE DIED IN RIP CURRENTS AND 
ANOTHER TWO DIED DUE TO INJURIES FROM DANGEROUSLY HIGH SURF 
CONDITIONS. IN ADDITION THERE WERE 8 WEATHER RELATED INJURIES: ONE 
FROM FLYING DEBRIS DURING A TORNADO...TWO FROM LIGHTNING 
STRIKES...ONE FROM FALLING DEBRIS DURING A THUNDERSTORM...TWO FROM 
HAIL...ONE FROM A RIP CURRENT...AND ONE FROM HIGH SURF. DUE TO AN 
INACTIVE WET SEASON...EAST CENTRAL FLORIDA EXPERIENCED ONLY 6 
CONFIRMED TORNADOES IN 2010...WHICH IS THE FEWEST TORNADOES IN THE 
AREA SINCE 2003. ALL SIX TORNADOES WERE RATED EF0.

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/BOWEN/GLITTO

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