Area Forecast Discussion
Issued by NWS Louisville, KY

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244
FXUS63 KLMK 261054
AFDLMK

Area Forecast Discussion
National Weather Service Louisville KY
654 AM EDT Wed Apr 26 2017

...Updated Aviation Discussion...

.Short Term...(Today through Thursday)
Issued at 300 AM EDT Wed Apr 26 2017

Today...

A warm sunny day is expected today courtesy of a strong southerly
flow in between a ridge to our east and a deep trough to our west.
South winds of 10-15 mph will gust to around 25 mph this afternoon.
High temps should top out in the lower 80s.

Tonight - Thursday...

Tonight the upper trough will lift northeast over the central CONUS
pushing a cold front through the Ohio Valley.  This will bring a
decaying line of showers and t-storms through central KY/southern IN
late tonight into Thu morning.  With most of the forcing for ascent
getting pulled NE and limited instability, think that any storms Thu
night will probably remain below severe limits.  However, can`t rule
out a strong storm with gusty winds and brief heavy rainfall. Lows
tonight will range through the upper 50s to lower 60s.

Showers/storms will exit the area by Thu early afternoon with skies
becoming partly cloudy.  Highs in the post-frontal airmass should
range from the mid 60s to low 70s.

.Long Term...(Thursday night through Tuesday)
Issued at 335 AM EDT Wed Apr 26 2017

Friday - Saturday...

Fri/Sat a low pressure system will deepen over the south central
U.S. resulting in a warm front developing near our region.  This
front will sharpen and wobble a bit Fri/Sat resulting in several
precip chances for the end of the week.  Depending on the exact
evolution of this front and the warm sector, a chance for strong
storms could exist especially along and south of the front. Highs
Fri/Sat will range from the upper 70s to mid 80s with bust potential
depending on exact location of the warm front.

Sunday...

By Sunday we should be solidly rooted in the warm sector with the
main cold front progged to move east through the Ohio Valley some
time Sun night or early Mon morning (timing differences still exist
in long range models).  1000-2000 j/kg and a strong wind profile
could result in the potential for strong to severe storms with
strong to damaging winds and hail along and ahead of the front.
Sunday high temps should be similar to Fri/Sat.

Monday - Tuesday...

Showers will quickly exit the area Monday with cooler, dry weather
expected through Tue.  High temps will fall back into the 60s/lower
70s for the beginning of work week with lows in the 40s/low 50s.

&&

.Aviation...(12Z TAF Issuance)
Issued at 653 EDT Wed Apr 26 2017

The pressure gradient across the region will tighten up today as a
cold front approaches. Winds will pick up this morning and become
gusty by mid morning. Skies will be mostly clear through the day
except for some cirrus passing overhead. A low level jet will
strengthen this evening with 45-50 knots around 1400-1600 feet. Thus
will continue to mention low level wind shear in the TAFs. As the
cold front approaches early tomorrow the atmosphere will become more
mixed and the low level jet will lessen over the area. Will then
introduce showers to the forecast at SDF and BWG early Thursday
morning.

&&

.LMK WATCHES/WARNINGS/ADVISORIES...
IN...None.
KY...None.
&&

$$

Short Term...AMS
Long Term...AMS
Aviation...EER



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