Area Forecast Discussion
Issued by NWS Jackson, KY

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FXUS63 KJKL 181901

National Weather Service Jackson KY
301 PM EDT Wed Oct 18 2017

.SHORT TERM...(This evening through Thursday night)
Issued at 301 PM EDT WED OCT 18 2017

Surface high pressure will remain entrenched across the area
for the next 36 hours. Aloft a weak short wave trough will swing
across the area tonight and early Thursday, but with limited
moisture this will essentially have no impact on our local
weather. After the passage of the weak short wave trough upper
level ridging will build across the area.

With the building upper ridge temperatures will continue to warm.
For the overnight lows the ridge valley temperature differences
will become more pronounced tonight and Thursday night as well,
especially in the east. Will continue to see fog each night,
mainly in the river valleys and near bodies of water.

.LONG TERM...(Friday through Wednesday)
Issued at 301 PM EDT WED OCT 18 2017

Warm and dry weather is expected across eastern Kentucky to begin
the extended period, as a ridge of high pressure is still forecast
to remain in place across the region. High temperatures on Friday,
Saturday and Sunday should top out in the mid to upper 70s. The dry
weather is expected to come to an end late in the day on Sunday, as
a trough of low pressure in the upper atmosphere, and its surface
cold front, move across the area and the ridge retreats eastward.
The best shot of rain should be from early Monday morning through
early Tuesday morning during frontal passage. The rain may linger
through the day on Tuesday and Tuesday night, as residual
moisture wraps around the back side of the passing trough.
Temperatures should begin to cool off on Monday as the rain moves
through. Another shot of cooler air is then expected to begin
filtering into the area Monday night and Tuesday, as winds shift
to the west and northwest behind the departing frontal boundary.
Highs on Monday are expected to reach the lower 70s. Nightly lows
should be in the upper 40s and lower 50s over the weekend, the
low to mid 50s to start the new work week, and in the lower 40s on
Wednesday morning, after the main push of cool air moves in.


.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)

High pressure will remain in control of the weather through the
TAF period. VFR conditions will prevail through the next 24 hours,
with the exception being in the river valleys and near larger
creeks and lakes where fog will form late tonight. Fog is expected
to affect SME late tonight and early Thursday morning, and bring a
period of IFR conditions. The other TAF sites are expected to
remain VFR.




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