Area Forecast Discussion
Issued by NWS Louisville, KY

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FXUS63 KLMK 201908
AFDLMK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOUISVILLE KY
308 PM EDT Mon Oct 20 2014

.SHORT TERM (Now through Tuesday Night)...
Issued at 256 PM EDT Mon Oct 20 2014

An upper level trough will deepen across the northeastern CONUS
through the long term, eventually becoming a cutoff low. A cold
front associated with this system will move through the area
tonight. In addition, a couple of PV anomalies rotating around the
base of the trough will bring slight chances for light showers.

The first chance for showers will be late this afternoon into this
evening. Mesoscale models, which have been doing well the past
couple of days, suggest a broken line of showers will develop along
or near the river this evening and shift off to the southeast,
moving out of the forecast area by around 03-04Z. Showers should be
light and measurable precipitation low, so will keep only 20%
chances in the grids. The next disturbance tomorrow morning will
affect mainly southern IN and north central KY. Again, will keep
only a 20% chance in the forecast. Dry conditions are expected from
tomorrow afternoon through tomorrow night.

Temperatures tonight will drop into the mid 40s to lower 50s. Cold
air advection will keep temperatures on the cooler side tomorrow
with highs in the upper 50s to lower 60s expected. Tuesday morning
will see cooler temps with lows in the lower 40s.

.LONG TERM (Wednesday through Monday)...
Issued at 305 PM EDT Mon Oct 20 2014

A departing upper low and sfc high pressure will keep us cool and
dry for the middle of this week.  Expect high temps in the upper 50s
and lower 60s Wed/Thurs.  Thurs morning looks to be the coolest with
sfc ridging and a light NE flow pulling in cooler air from the
departing low.  Lows look to range from the mid 30s to around 40
with frost possible.  Friday lows will be a tad warmer ranging from
the mid/upper 30s east of I-65 to lower 40s west of I-65.  Expect
increased cloudiness as an upper trough passes through the region
Friday.

Ridging aloft will move in from the Plains this weekend with another
area of sfc high pressure.  This will keep conditions dry with a
warm up in temps through the beginning of next week.  With h85 temps
rebounding back into the 10-14 degree C range, sfc highs should be
in mid 60s to low 70s Fri/Sat and then solidly into the lower 70s
for Sun/Mon.  Night time lows will jump back into the mid 40s to
lower 50s.

&&

.AVIATION (18Z TAF Update)...
Updated at 105 PM EDT Mon Oct 20 2014

Isolated showers will continue this afternoon as another disturbance
nears the area. However, the chances of any one of them affecting
the terminals are low so will leave mention of them out of the TAFs.
VFR conditions are expected to continue for the remainder of the
afternoon at all sites. Some breaks in the clouds are expected
through the afternoon.

For tonight a cold front will move through the area. Clouds will
build back in, particularly at LEX and SDF. This will shift winds to
the northwest by tomorrow morning with speeds increasing to 8-10
knots. Some light fog will be possible at LEX early tomorrow
morning. This should improve shortly after sunrise.

&&

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

$$

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





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