Public Information Statement
Issued by NWS Melbourne, FL

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5
000
NOUS42 KMLB 011745
PNSMLB

Public Information Statement
National Weather Service Melbourne FL
1245 PM EST Fri Dec 1 2017

...Fall 2017 was Warmer and Much Wetter Than Normal Across East
Central Florida...

Periods of excessive rainfall occurred across the area during the
Fall, with the widespread torrential rains that occurred with
Hurricane Irma and the wet pattern that then continued into October.
While drier conditions prevailed over interior locations into
November, periods of locally heavy rainfall along the coast and
across extreme northern central Florida continued to produce near to
above normal rainfall across these regions during the month. The
overall wet conditions produced well above normal precipitation for
the season, with this past Fall ranking in the top 10 wettest for
most sites in east central Florida.

While a couple significant cool downs occurred into late October,
cold frontal passages across the region were limited and often weak.
This allowed temperatures to remain near to above normal for much of
the season. This was especially true for overnight lows, with above
average minimum temperatures each month playing a larger role in
producing overall warmer than normal temperatures for the Fall.

Temperatures...

Despite a brief cooler period from the cloudy and wet conditions
associated with Hurricane Irma, temperatures were generally warmer
than normal to start the Fall. Melbourne actually tied 2007 for its
warmest September on record, with a monthly average temperature that
was nearly two degrees above normal. Warmer than normal conditions
continued into much of October before a couple stronger cold fronts
moved through the region late in the month. If not for the
significant cool down these frontal passages ushered in, October
would have been one of the warmest on record for many sites. Still,
average temperature values for the month ended up near to above
normal. Several cold fronts moved through the region in November,
but were not as strong, with only brief cooler periods occurring.
This continued a warmer than normal pattern to finish out the
season.

It is important to note that much of the warmth during the Fall was
not from extreme high temperatures, which were often just near to
slightly above normal, but very warm overnight lows. This was
especially noticeable during the month of October, where numerous
warm minimum temperature records were tied or broken across east
central Florida. To put this in greater context, average max
temperatures across the area this season ranged from -0.5 to +0.8
degrees from normal, while average lows ranged from +1.4 to +4.3
degrees from normal. Overall, Fall average temperatures were
generally around 1 to 2 degrees above normal, with most sites
ranking in their top 10 warmest. The most notable was Melbourne,
which ranked 2nd warmest, with an average seasonal temperature of
2.6 degrees above normal.


Average temperature values for Fall 2017 at the four primary
climate sites across east central Florida are as follows (rankings
provided if in the top 10):

- Daytona Beach had an average temperature for the season of 75.1
degrees Fahrenheit, which was 1.7 degrees above normal. This value
ties Fall 1973 as the 9th warmest average temperature for Fall on
record for this site, with records going back to 1923.

- Sanford had an average temperature for the season of 75.8 degrees
Fahrenheit, which was 0.9 degrees above normal. This value ranks as
the 6th warmest average temperature for Fall on record for this
site, with records extending back to 1948.

- Orlando had an average temperature for the season of 75.5 degrees
Fahrenheit, which was 0.5 degrees above normal.

- Melbourne had an average temperature for the season of 77.8
degrees Fahrenheit, which was 2.6 degrees above normal. This ranks
as the 2nd warmest average temperature for Fall at this site. The
warmest Fall on record at Melbourne is 78.4 degrees set in 2015,
with records going back to 1937.

- Vero Beach had an average temperature for the season of 76.6
degrees Fahrenheit, which was 0.8 degrees above normal. This value
ties Fall 2009, 1992 and 1948 as the 9th warmest average temperature
for Fall at this site, with records going back to 1942.

- Fort Pierce had an average temperature for the season of 76.6
degrees Fahrenheit, which was 0.9 degree above normal.


Rainfall...

Typical "wet-season" sea breeze generated showers and storms
continued into early September before Hurricane Irma brought
widespread torrential rainfall to the area from the 10th to early on
the 11th of September. Rainfall from Irma averaged from 7 to 12
inches for most areas, which combined with additional precipitation
during the month to produce totals for September that already neared
or exceeded normal precipitation for the entire Fall! Melbourne
actually had their wettest September on record, with many other
sites within their respective top 5 wettest rankings.

Periods of heavy rainfall continued into October especially along
the coast and southern areas of east central Florida. The most
notable event occurred on the 1st when persistent onshore moving
heavy rain bands produced locally excessive rainfall amounts up to 8
to 10 inches in portions of Brevard County. Total precipitation for
the month ended up near normal across inland areas north of
Okeechobee County, while farther south and along the coast amounts
ranged from 4 to 8 inches above normal for October. Melbourne not
only had their 2nd wettest October, but when combined with
September`s rainfall, leading to a total of 34.38 inches, had
already broke their Fall precipitation record of 32.95 inches set in
1999 with a whole month yet to go in the season!

More prolonged drier periods occurred into November, but stalled
frontal boundaries and periods of onshore flow led to locally heavy
rainfall at times along the coast. In addition an area of low
pressure that crossed the state, produced a heavy rainfall band
across extreme northern portions of Lake and Volusia counties on
Thanksgiving Day. This led to overall totals during the month that
were near to above normal for these areas, while across much of the
interior drier than normal conditions occurred. Orlando only had
0.17 inches for all of November, which ranked as their 8th driest.

Despite the drier conditions in November, the overwhelming wet
periods of September and October produced well above normal rainfall
amounts for the season. Precipitation for the Fall ranged from 15 to
20 inches for much of the interior and Volusia County, while across
Okeechobee County, Brevard County and the Treasure Coast totals were
around 25 to 35 inches. This was around 150 to 200 percent of normal
rainfall for the season across much of east central Florida.

Fall 2017 rainfall totals for the four primary climate sites
across east central Florida are as follows (ranking provided if in
the top 10):

- Daytona Beach received 19.11 inches of rain for the season, which
was 5.25 inches above normal.

- Sanford received 16.54 inches of rain for the season, which was
4.16 inches above normal.

- Orlando received 17.85 inches of rain for the season, which was
6.31 inches above normal. This value ranks as the 10th highest
precipitation total for the Fall at this site, with records going
back to 1892.

- Melbourne received 36.97 inches of rain for the season, which was
21.39 inches above normal. This amount ranks as the highest rainfall
amount for the Fall at this site. The previous wettest Fall on
record at Melbourne is 32.95 inches set in 1999, with records going
back to 1937.

- Vero Beach received 26.77 inches of rain for the season, which was
11.79 inches above normal. This amount ranks as the 5th highest
precipitation total for the Fall at this site, with records going
back to 1942.

- Fort Pierce received 31.96 inches of rain for the season, which
was 16.52 inches above normal. This amount ranks as the 2nd highest
rainfall amount for the Fall at this site. The wettest Fall on
record at Fort Pierce is 33.60 inches set in 1947, with records
going back to 1901.


Cooperative Observer Station Rainfall Rankings:

- Clermont received 15.35 inches of rain for the season, which ranks
as the 10th wettest Fall on record. Records for this site go back to
1923.

- Titusville received 26.56 inches of rain for the season, which
ranks as the 7th wettest Fall on record. Records for this site go
back to 1901.

- Stuart received 34.11 inches of rain for the season, which ranks
as the 3rd wettest Fall on record. Records for this site go back
to 1935.


Below is a list of observed precipitation totals and rainfall
statistics for select sites across east central Florida for Fall
2017:

Station         Fall 2017       Normal      Departure    Percent of
                Rainfall       Rainfall    From Normal     Normal

Daytona Beach    19.11"         13.86"       +5.25"         138%
(DAB)
Orlando          17.85"         11.54"       +6.31"         155%
(MCO)
Melbourne        36.97"         15.58"      +21.39"         237%
(MLB)
Vero Beach       26.77"         14.98"      +11.79"         179%
(VRB)
Clermont         15.35"          9.75"       +5.60"         157%
(CLRF1)
Leesburg         14.96"         11.13"       +3.83"         134%
(LEE)
Sanford          16.54"         12.38"       +4.16"         134%
(SFNF1)
Titusville       26.56"         12.48"      +14.08"         213%
(TITF1)
Fort Pierce      31.96"         15.44"      +16.52"         207%
(FPCF1)
Stuart           34.11"         19.05"      +15.06"         179%
(STRF1)

For more local climate information, please visit our web page at
http://weather.gov/mlb and click on the "Climate" icon toward the
bottom of the page.

$$

Weitlich


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.