Area Forecast Discussion
Issued by NWS Jackson, KY

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FXUS63 KJKL 290759

Area Forecast Discussion
National Weather Service Jackson KY
359 AM EDT MON AUG 29 2016

.SHORT TERM...(Today through Tuesday)
Issued at 359 AM EDT MON AUG 29 2016

An upper level ridge over the area will continue to weaken, and a
trough will begin to drop southeast over the Great Lakes during
the period. Features over the local area will be weak/benign. A
low level humid air mass will remain in place today, and with
daytime heating, some thunderstorms won`t be ruled out. However,
forecast soundings show drying aloft, and without upper level
support, entrainment of drier air will be more of a limiting
factor on convective currents as compared to Sunday. Have not used
anything higher than a 20% POP in the JKL forecast area for today,
and even that may be generous. Both the GFS MOS and NAM MOS have
sub-20% POPs. Any convective precip will die this evening. Drier
low level air should start advecting into the area tonight and
Tuesday in the flow around high pressure passing by to our north.
That being the case, have only used a silent 10% POP for Tuesday.

.LONG TERM...(Tuesday night through Sunday)
Issued at 359 AM EDT MON AUG 29 2016

A pattern change will be underway by Tuesday night as an upper level
ridge shifts to our west and is replaced by a longwave trough by
late in the week. At the surface, a cold front will drop through the
region late Wednesday night into Thursday morning. This late arrival
time and limited instability should keep the frontal passage
relatively dry, with only a small chance of a shower or storm. A
cooler and much drier airmass will then advect in as high pressure
builds across the Great Lakes into the Northeast from Thursday
afternoon into the weekend. As a result, temperatures will fall from
the upper 80s on Wednesday into the upper 70s and low 80s behind the
front on Friday with much more comfortable humidity levels as well.
Temperatures will moderate back into the mid 80s by Sunday and
dewpoints will climb back into the 60s as the surface high shifts to
our east and our flow becomes more southerly. It looks dry for the
Labor Day weekend as of now with any tropical mischief moving by
well to our south and east.


.AVIATION...(For the 06Z TAFS through 06Z Monday night)

A generally quiet period is in store. Fog will affect some
locations with IFR or worse conditions early this morning- mainly
in the larger/deeper valleys. Once the fog dissipates, mostly VFR
conditions are expected through the end of the period. A few
showers or thunderstorms can`t be ruled out during the heat of
the afternoon, but they should not be as prevalent as on Sunday.


.JKL Watches/Warnings/Advisories...


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