Area Forecast Discussion
Issued by NWS Key West, FL

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FXUS62 KKEY 280146

Area Forecast Discussion
National Weather Service Key West FL
846 PM EST Sun Nov 27 2022


Issued at 845 PM EST Sun Nov 27 2022

Another quiet evening over the Florida Keys and coastal waters. No
showers are detected by KBYX radar, and satellite imagery is
showing few, if any, low and mid level clouds. There is a good
deal of cirrus overhead, coming out of the southwest. The Key West
evening sounding revealed a dry and stable troposphere, with PWAT
about a tenth of an inch below climatology, at 1.16 inches. A
subsidence inversion is evident around 4.5 kft. Overall, there is
no apparent potential instability in the evening sounding.
Considering this to be representative of the overnight period,
rain chances overnight are near zero. Near surface winds across
the islands have been light and variable over the past several
hours, as the Keys are sitting under the axis of weak surface
ridging extending from the Atlantic. The only sensible weather
concern is whether patchy fog could develop over the interior of
the larger islands. Surface dewpoint depressions could drop to 5
degrees or less as the larger islands of the lower Keys radiate
in the light near surface flow. However, this should be VERY
localized to islands like Big Pine Key, and have little impact on
visibility along the Overseas Highway or at either airport
terminal. Therefore will hold off mention in the zone forecasts.
Otherwise, no changes in the current forecast are necessary for
the update cycle.


Issued at 845 PM EST Sun Nov 27 2022

Light and variable winds will persist overnight and into tomorrow
morning. Tomorrow after daybreak, winds will begin to organize out
of the northeast, but remain light. No showers or storms are
expected over the coastal waters, except the possibility of an
isolated weak shower over the Gulf Stream waters tomorrow morning.


(00Z TAFS)
Issued at 845 PM EST Sun Nov 27 2022

VFR conditions will prevail overnight and into tomorrow morning at
both the Key West and Marathon terminals. Winds will be light and
variable overnight, and begin to organize out of the northeast
tomorrow after sunrise, but remain light.




Data Acquisition.....MJV

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