Area Forecast Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

FXUS62 KKEY 241359

Area Forecast Discussion
National Weather Service Key West FL
959 AM EDT Sun Sep 24 2017

Under partly to mostly sunny skies and light and variable winds,
temperatures are on the rise with readings in the mid to upper
80s. Meanwhile, local radars are only detecting isolated small
showers in our county warning area. Surface wise, our region lies
on the southern periphery of a large, albeit weak anticyclone
centered over the western Pennsylvania and upstate New York. On
our marine district, winds are variable at 5 knots or less.
Otherwise, our morning sounding reveals plenty of moisture below
700 mb, with light and variable winds overlaid by a cyclonic and
increasing southwest trajectory especially above 300 mb.


.SHORT TERM...(Rest of today)
Little change in the overall synoptic scale with mid and and upper
level cyclonic flow overlaying a decoupled, weak and chaotic low
level trajectory. Furthermore, light winds below 700 mb will be
in a state of flux. So despite ample moisture and light winds, any
wet cloud line genesis should be small segments and predominately
to the north of the island chain, hence, only isolated 20 percent
pops seem on track. Plenty of insolation with light and variable
winds will allow high temperatures to climb near 90 degrees.


Away from any isolated showers or thunderstorms, winds will be
variable at 10 knots or less on all Keys coastal waters.


VFR conditions are expected at both KEYW & KMTH today
with a slight chance of light showers that could affect the
visibility but these should be brief. Variable winds will be at
around 6 knots.IATION...


In 1963, the daily record low temperature of 72 degrees was last
recorded in Key West. Temperature records have been kept since




Data Collection......Fling

Visit us on the web at

Follow us on Facebook and Twitter at: is the U.S. government's official web portal to all federal, state and local government web resources and services.