Area Forecast Discussion
Issued by NWS Louisville, KY
FXUS63 KLMK 222304
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOUISVILLE KY
704 PM EDT Mon Sep 22 2014
...Updated Aviation Discussion...
.SHORT TERM (Now through Tuesday Night)...
Issued at 300 PM EDT Mon Sep 22 2014
In the wake of a 500mb trough that has moved southeast of the
Tennessee Valley, strong high pressure of Canadian origin will
settle southeast and is forecast to lie right over Cincinnati
Tuesday morning. Subsidence and a very dry airmass over the Ohio
Valley will bring clear, practically cloud-free skies through at
least Wednesday morning.
Early Tuesday will be chilly, the coolest morning so far this fall
season. Near ideal radiational cooling conditions will be in place
with clear skies, very light winds and low dewpoints. Some of our
very coldest locations may reach the upper 30s. But, overall, lows
will range from the lower to upper 40s.
Ridging centered over Ohio Tuesday and Tuesday night will provide a
period of very light northeast winds. Nearly calm winds early
Tuesday will only become northeasterly at around 5 to 8 mph during
the afternoon. Tuesday`s highs will not warm dramatically, but will
reach the lower 70s.
Under clear skies, lows early Wednesday will fall into the upper 40s
to around 50.
.LONG TERM (Wednesday through Monday)...
Issued at 303 PM EDT Mon Sep 22 2014
Quiet autumn weather will be the rule for the long term as we enjoy
ridging at the surface and aloft. Rain chances will finally start to
re-enter the forecast by the tail end of the weekend into Monday as
the ridging breaks down and Gulf moisture attempts to flow northward.
High temperatures each day will be in the upper 70s to around 80.
Lows each morning will vary widely between rural and urban areas,
but will generally be centered around the 50s.
.AVIATION (00Z TAF Update)...
Issued at 704 PM EDT Mon Sep 22 2014
Clear skies and VFR conditions are expected this evening and into
the overnight hours. A light north to northeasterly wind will
diminish to light and variable this evening and into the overnight
hours. Ceilings and visibilities will remain VFR on Tuesday with
light northeast winds of 5-7 knots.