Area Forecast Discussion
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FXUS62 KKEY 261413

Area Forecast Discussion
National Weather Service Key West FL
1013 AM EDT Thu Apr 26 2018

A short wave trough evident on water vapor channels is sliding
east through the twin states of MS/AL. Meanwhile, an errant node
from this parent trough has reached the southwestern Gulf of
Mexico. Satellite derived moisture products indicate a dry air
mass persists across the Florida Keys. TPW loops highlight a stark
gradient in moisture stretching from the central Bahamas to the
Yucatan Peninsula. The Florida Keys are on the dry side of this
boundary, and this morning`s KKEY sounding corroborates the
limited moisture, sampling only 1.12" of PW. Deep convection
thrives along the low level moisture maximum, even during these
morning hours. Winds across the Florida Keys and adjacent coastal
waters average 5 knots, tending from the NE. The KBYX radar
detects isolated thunderstorms across the distant Straits of
Florida which are creeping northeastward. The forecast calls for
highs in the mid 80s with slim rain chances. We will monitor any
kinks to the moisture boundary as the short wave over the southern
Gulf propagates eastward. Otherwise, no changes needed at this


No current watches, warnings, or advisories. From synopsis, a
weak pressure pattern will prevail across the coastal waters of
the Florida Keys this afternoon through Sunday. High pressure
developing over the southeastern United States Sunday night will
broaden and intensify over the western North Atlantic Monday and
Monday night.


VFR conditions will prevail at both the Key West and Marathon
terminals through this evening. Near surface winds will be
variable near 5 knots, mainly out of the northeast to east. At
points through the day, winds could be calm.




Data Collection......Devanas

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