Area Forecast Discussion
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000
FXUS62 KKEY 240251
AFDKEY

Area Forecast Discussion
National Weather Service Key West FL
1051 PM EDT Mon Apr 23 2018

.DISCUSSION...
Currently - A low pressure system has swung eastwards into the
southeastern United States. This has pushed a loose ridge axis
southeastwards across the central Bahamas and Florida Straits.
Winds are weakening out of the south. Winds have gone nearly flat
over our western zones. This evenings sounding indicated quite a
lot of moisture above 700 mb, but substantial dry air from there
to just above the surface. The weak flow, low level inhibition and
dry air have thus far prevented any shower development.

Short Term Update - The proximity of the previously mentioned
ridge and a call in the southeastern Gulf of Mexico will keep
winds light across the forecast area. Winds will tend lighter and
more variable the further west. There is some potential for
radiational cooling in protected interior locations. However,
winds near perpendicular to the island chain will keep pressing
warm air straight across the Keys. Expect overnight lows in the
mid to upper 70s and dew points holding in the lower 70s. The
persistence of lower level dry air and weak flow will make it
difficult for shower formation. Have made small updated in an
evening local forecast.

&&

.MARINE...
Surface winds will remain weak out of the south to southwest with
winds tending variable on our western most waters. This is due to
a broad ridge extending across the Bahamas and Florida Straits and
a col off to our west. Minor adjustments made to initial winds and
transitional wording in the evening marine update.

&&

.AVIATION...
VFR conditions will prevail at the island terminals. Surface winds
will be weak out of the south.

&&

.KEY WATCHES/WARNINGS/ADVISORIES...
FL...None.
GM...None.

&&

$$

Public/Marine/Fire...11
Aviation/Nowcasts....11
Data Collection......DR

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