FXUS62 KMLB 250109
Area Forecast Discussion
National Weather Service Melbourne FL
909 PM EDT Tue Apr 24 2018
Current-Overnight...Conditions are quieting down after a busy
afternoon and early evening across the Treasure Coast and adjacent
coastal waters. Much drier air filtering down the peninsula this
evening behind a weak surface trough, located near Lake Okeechobee.
Dewpoints have fallen into the 50s behind this feature and remain
around 70F ahead of it. Westerly winds tonight generally 5-10 mph.
Overnight lows cooler and will range from the U50s to L60s. Will be
able to take out all PoPs over land with the evening zones update.
Wed-Wed night...Previous...Post frontal ridge will bring a very
dry/stable airmass into FL Peninsula with PWat values fcst to drop
to arnd 0.75", H100-H70 mean RH values falling 35-45pct, avg
dewpoint depressions increasing to 25-30C thru the H85-H50 lyr, and
a 10-15C subsidence inversion dominating the H95-H70 lyr. Origin of
the airmass was the central/srn Plains, so post-frontal cooling will
be minimal with near full sun and light wrly flow. Max temps in the
L/M80s, within a deg or two of climo avg.
.AVIATION...Drier post-trough conditions. Expect any shower activity
to remain south of the Treasure Coast. Westerly winds tonight 5-10
kts continuing into Wed but slightly stronger with some afternoon
gusts. Mainly VFR.
.MARINE...Overnight-Wed...Marginal to poor boating conditions as
seas build to 4-6 ft offshore with westerly winds increasing up to
15-20 kts before decreasing again just ahead of daybreak. Seas 3-5
ft near shore. Showers and isolated storms on the decrease this
evening and overnight south of Ft. Pierce.
Wed-Wed night...Previous Modified...Gentle to moderate post-frontal
W/WNW breeze thru midday, diminishing to a light to gentle breeze by
mid aftn as a storm system lifts up the ern seaboard. Seas subsiding
to 2-3FT nearshore and 4-5FT offshore by early afternoon, then 2-4FT
areawide by evening.
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