NOUS42 KMLB 021525
PNSMLB
FLZ041-044>047-053-054-058-059-064-141-144-147-030000-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
1125 AM EDT SAT OCT 2 2010

...ABOVE NORMAL TEMPERATURES AND A MOSTLY DRY WEATHER PATTERN
PERSISTED INTO SEPTEMBER 2010...

THE FIRST CLIMATOLOGICAL MONTH OF FALL CONTINUED A WARM AND
RELATIVELY DRY WEATHER PATTERN ACROSS EAST CENTRAL FLORIDA...WHICH
HAS EXISTED SINCE THIS PAST SUMMER. OVERALL...THIS ALLOWED FOR ABOVE
NORMAL TEMPERATURES AND BELOW NORMAL RAINFALL FOR SEPTEMBER.

.TEMPERATURES...

A FEW FRONTAL BOUNDARIES MOVED INTO THE AREA DURING THE MONTH OF
SEPTEMBER BUT WERE VERY WEAK WITH NO NOTICEABLE IMPACT ON
TEMPERATURES. EXTENDED PERIODS OF DRIER AIR OVER THE REGION
LEAD TO BELOW NORMAL AFTERNOON CONVECTION AND PROVIDED MORE SUNSHINE
AND DAYTIME HEATING. ALSO AN AVERAGE NORTHWARD PLACEMENT OF THE
ATLANTIC HIGH PRESSURE RIDGE PROVIDED PERIODS OF ELEVATED ONSHORE
FLOW...ESPECIALLY DURING THE SECOND HALF OF THE MONTH. THIS KEPT
NIGHTTIME TEMPERATURES ABOVE NORMAL FOR SEVERAL DAYS WITH MELBOURNE
AND VERO BEACH BREAKING OR TYING A FEW WARM LOW TEMPERATURE RECORDS.
A COMBINATION OF ALL OF THESE CONDITIONS ALLOWED FOR AVERAGE DAILY
TEMPERATURE DEPARTURES TO RANGE ROUGHLY FROM 1 TO 4 DEGREES ABOVE
NORMAL FOR MUCH OF THE MONTH.

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

-DAYTONA BEACH HAD AN AVERAGE MONTHLY TEMPERATURE OF 80.6 DEGREES
FAHRENHEIT WHICH WAS 0.7 DEGREES ABOVE NORMAL. THIS MADE FOR THE 9TH
WARMEST SEPTEMBER ON RECORD...TYING 1978 AND 2007. THE NUMBER 1
RECORD IS 82.4 DEGREES SET IN 1970.

-ORLANDO HAD AN AVERAGE MONTHLY TEMPERATURE OF 81.8 DEGREES
FAHRENHEIT WHICH WAS 0.8 DEGREES ABOVE NORMAL. THIS RANKED THE MONTH
AS THE 9TH WARMEST ON RECORD...TYING 1971, 1972, 1974, AND 2007. THE
NUMBER 1 RECORD IS 83.9 DEGREES SET IN 1988.

-MELBOURNE HAD AN AVERAGE MONTHLY TEMPERATURE OF 82.3 DEGREES
FAHRENHEIT WHICH WAS 2.3 DEGREES ABOVE NORMAL. THIS WAS THE 2ND
WARMEST SEPTEMBER ON RECORD AND JUST MISSED THE NUMBER 1 RECORD OF
82.4 DEGREES SET IN 2007.

-VERO BEACH HAD AN AVERAGE MONTHLY TEMPERATURE OF 81.8 DEGREES
FAHRENHEIT WHICH WAS 1.1 DEGREES ABOVE NORMAL. THIS TIED 1989 AS THE
4TH WARMEST SEPTEMBER ON RECORD. THE NUMBER 1 RECORD IS 82.5 SET IN
1996.

.RAINFALL...

THE WEAK FRONTAL BOUNDARIES THAT MOVED INTO FLORIDA DURING THE
BEGINNING HALF OF THE MONTH PROVIDED A SLIGHT INCREASE IN SHOWERS
AND THUNDERSTORMS ACROSS THE AREA. HOWEVER MUCH OF THE MONTH WAS
DOMINATED BY A DRIER AIRMASS OVER THE REGION AND KEPT AFTERNOON
CONVECTIVE ACTIVITY WELL BELOW NORMAL. ALSO DESPITE THE INCREASE IN
TROPICAL CYCLONES OBSERVED DURING SEPTEMBER OVER THE ATLANTIC AND
GULF OF MEXICO BASINS...ALL SYSTEMS THAT FORMED EITHER RECURVED WELL
TO THE EAST OR REMAINED SOUTH OF THE FLORIDA PENINSULA. THE MAIN
INDIRECT INFLUENCE IN REGARDS TO PRECIPITATION CAME FROM TROPICAL
CYCLONE NICOLE WHICH LIFTED NORTHWARD OUT OF THE NORTHWEST CARIBBEAN
LATE IN THE MONTH. TROPICAL MOISTURE AHEAD OF THIS SYSTEM MOVED INTO
CENTRAL FLORIDA AND INTERACTED WITH A WEAK FRONTAL BOUNDARY THAT HAD
STALLED OVER THE AREA. THIS COMBINED EFFECT PRODUCED WIDESPREAD
RAINFALL ACROSS EAST CENTRAL FLORIDA ON THE 28TH WITH AVERAGE TOTALS
AROUND 1 TO 3 INCHES WITH LOCALLY HIGHER AMOUNTS OCCURRING ALONG THE
BREVARD AND TREASURE COASTS. A FEW SPOTTER AND COCORAHS OBSERVATIONS
REPORTED UP TO 6 TO 8 INCHES NEAR THE COCOA AREA.

DESPITE THE LATE MONTH HEAVY RAINFALL EVENT...RAINFALL TOTALS FOR
SEPTEMBER REMAINED BELOW NORMAL FOR MOST OF THE AREA. ON AVERAGE...
MONTHLY PRECIPITATION DEPARTURES WERE 1-3 INCHES BELOW NORMAL.
INTERESTINGLY ENOUGH THOUGH...OUT OF ALL OBSERVING SITES WITH LONGER
PERIODS OF RECORD...TITUSVILLE WAS THE ONLY LOCATION THAT RANKED IN
THE TOP 10 DRIEST FOR THE MONTH. WITH A MONTHLY TOTAL OF 3.28 INCHES
OF PRECIPITATION...IT WAS ITS 8TH DRIEST SEPTEMBER ON RECORD.

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

STATION         SEPT 2010       30 YEAR   DEPARTURE     PERCENT OF
                RAINFALL        NORMAL   FROM NORMAL     NORMAL

DAYTONA BEACH      3.49"         6.61"      -3.12"          53%
(DAB)
ORLANDO            5.67"         5.76"      -0.09"          98%
(MCO)
MELBOURNE          5.94"         7.20"      -1.26"          83%
(MLB)
VERO BEACH         4.80"         6.84"      -2.04"          70%
(VRB)
CLERMONT           3.94"         5.59"      -1.65"          70%
(CLRF1)
DELAND             2.67"         7.17"      -4.50"          37%
(DELF1)
SANFORD            3.58"         5.88"      -2.30"          61%
(SFNF1)
TITUSVILLE         3.28"         6.82"      -3.54"          48%
(TITF1)
FORT PIERCE        3.60"         7.81"      -4.21"          46%
(FPCF1)
STUART            10.12"         8.09"       2.03"         125%
(STRF1)

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/DIETZMANN



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