-- Discussion containing changed information from previous version are highlighted. --
483
FXUS62 KTBW 181739
AFDTBW

Area Forecast Discussion
National Weather Service Tampa Bay Ruskin FL
139 PM EDT Sat May 18 2024

.DISCUSSION...
-- Changed Discussion --
A shortwave trough continues to move through the S MS River
Valley this afternoon with embedded vort maxes rotating around the
base producing a series of MCSs along the N Gulf region ahead of
a surface frontal boundary. Models bring this convection into the
N FL Peninsula late this afternoon into tonight with some strong
to severe storms possible mainly over the N Nature Coast. SW low
level flow ahead of the front is also keeping the very warm and
humid conditions over the area with fairly high heat index values.
Those trying to cool off at Gulf beaches should remain aware as
strong rip currents with several rescues reported as long period
swell energy is producing 2-3 ft breaking waves especially at SW
facing beaches and the rip current statement remains in effect and
may need to be extended into Sunday.

The front and upper support is expected to move through the E Gulf
and FL Peninsula Sunday with much needed scattered to numerous showers
and a few thunderstorms through much of the day. SPC continues to
indicate a marginal risk for strong to possibly severe storms
ahead of and along the front.

The upper shortwave is expected to briefly stall in the W Atlantic
with troughing back over the area for Monday and Tuesday. The
front should be over S FL with weak high pressure building into N
FL with diurnal seabreeze showers or storms mainly in the interior
areas during the late afternoon and evening hours.

Upper ridging is expected to build back over the region from the
SW Gulf around mid week while surface high pressure and a drier
airmass hold through Fri with subsidence, warm temps and low rain
chances.
-- End Changed Discussion --

&&

.AVIATION...
-- Changed Discussion --
(18Z TAFS)
Gusty SW winds, mainly SCT low level cumulus clouds with cirrus
aloft, and VFR conditions through the afternoon/evening then
winds subside tonight then deteriorating conditions Sunday with
SCT-NMRS SHRA/TSRA.
-- End Changed Discussion --

&&

.MARINE...
-- Changed Discussion --
Gusty SW winds this afternoon combined with persistent long
period swells from the S Gulf to keep seas elevated and choppy
into Sunday. A frontal boundary will sag into the E Gulf with
scattered to numerous showers and thunderstorms Sunday. Weak high
pressure to build into the region with winds and seas slowly
subsiding early to mid week.
-- End Changed Discussion --

&&

.FIRE WEATHER...
-- Changed Discussion --
A front will move over the state with showers and thunderstorms
for most areas Sunday. High pressure and drier air will filter
into the area early to mid week with near critical RHs in some
interior zones.
-- End Changed Discussion --

&&

.PRELIMINARY POINT TEMPS/POPS...
-- Changed Discussion --
TPA  78  86  75  89 /  40  70  30  30
FMY  78  92  76  91 /  30  60  40  60
GIF  75  88  72  91 /  40  70  30  40
SRQ  77  88  75  90 /  30  70  30  30
BKV  71  87  68  90 /  60  70  20  30
SPG  79  86  78  88 /  40  70  30  30
-- End Changed Discussion --

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
FL...High Rip Current Risk until 8 PM EDT this evening for Coastal
     Charlotte-Coastal Hillsborough-Coastal Lee-Coastal Manatee-
     Coastal Sarasota-Pinellas.

Gulf waters...None.
-- End Changed Discussion --

&&

$$

RJD