Area Forecast Discussion
Issued by NWS Tampa Bay Area, FL

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688
FXUS62 KTBW 220003
AFDTBW

Area Forecast Discussion
National Weather Service Tampa Bay Ruskin FL
803 PM EDT Wed Apr 21 2021

.DISCUSSION...
Broad mid level troughing down the eastern seaboard this evening
slips offshore during the night as ridging builds from Mexico
northward aloft the high plains. This ridging shifts to the
Mississippi Valley by Thu afternoon. At the surface high pressure
near the upper Mississippi Valley settles down into the Deep South
Thu. A frontal boundary across far south FL slowly exits east as it
dissipates.

These features will usher in dry...stable...and somewhat coolish air
on initially northwest lower level flow that gradually becomes
northerly to northeasterly during the next 24 hours or so. However
winds become onshore along the coast Thu afternoon. Temperatures run
just below normal tonight then warm to around normal Thu...with the
drier air keeping conditions pleasant. Forecasts look good.

&&

.AVIATION...
22/00Z TAFs. VFR. Although a FEW-SCT SC/AC will continue this
evening across southern aerodromes then clear until AFT 20Z when a
few SC could drift in from the northeast. NW winds veer to NE for
Thu...except for an onshore shift near the coast in the afternoon.

&&

.MARINE...
High pressure settles into the southeast US Thu then tracks eastward
Fri/Sat as a cold front approaches then sweeps through Sun. Winds
gradually veer during the period with speeds occasionaly 15 to 20
knots.

&&

.Preliminary Point Temps/PoPs...
TPA  61  80  64  85 /   0   0   0  10
FMY  63  87  65  88 /   0   0   0  10
GIF  59  81  62  84 /   0   0   0  10
SRQ  60  81  62  85 /   0   0   0  10
BKV  50  79  54  85 /   0   0   0  10
SPG  64  79  67  84 /   0   0   0  10

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
FL...None.
Gulf waters...None.
&&

$$

DISCUSSION/AVIATION/MARINE...09/Rude
UPPER AIR...04/Sobien
DECISION SUPPORT...04/Sobien



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