417
FXUS63 KLMK 260526
AFDLMK

Area Forecast Discussion
National Weather Service Louisville KY
126 AM EDT Sat Jul 26 2025

...Updated Aviation Discussion...

.KEY MESSAGES...

* Heat Advisory this afternoon through Sunday evening over all of
  southern Indiana and part of central Kentucky

* Mainly dry conditions continue with isolated afternoon/evening
  convection possible.

* Heat and humidity continue into next week, but a cool down is
  expected after mid-week and into next weekend.

&&

.SHORT TERM /THROUGH SUNDAY/...
Issued at 315 PM EDT Fri Jul 25 2025

Afternoon Cu field is in full swing across the region this
afternoon.  Temperatures were in the upper 80s and lower 90s.  With
dewpoints in the lower-middle 70s, afternoon heat index readings
were in the upper 90s to the lower 100s.   Area radars show a few
scattered showers and storms going up, mainly west of I-65 and south
of the WK Parkway.  A few other storms were located down across the
Lake Cumberland region.  For the remainder of the afternoon, warm
and humid conditions will continue across the region with afternoon
highs topping out in the lower 90s.

For this evening and overnight, expect Cu field to mix out and
isolated/scattered convection to diminish with the loss of heating
around sunset.  Some convection may persist a little longer across
our northern CWA across southern IN if convective outflows propagate
southward and fire off additional convection.  Lows tonight will be
in the low-mid 70s.

For Saturday and Sunday, the upper level ridge over the southeast US
will retrograde to the west and start to amplify a bit.  This should
lead to slightly warmer temperatures and along with continued high
humidity across the region.  Scattered showers/storms will be
possible across southern IN and Ohio tomorrow and again Sunday, so
we`ll keep chance PoPs going across the I-64 corridor and points
north. Afternoon highs will be in the lower 90s with heat indices
warming into 100-105 range from about US 27/127 and points westward.

Given that afternoon heat indices will in the 100-105 degree range
each afternoon, have coordinated with surrounding offices to extend
the Heat Advisory through Sunday evening.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Issued at 315 PM EDT Fri Jul 25 2025

Moving into next week, mid-level ridge over the southeast will
continue to retrograde westward into the Plains.  This will keep hot
and humid conditions in place across the Ohio Valley thorugh about
Wednesday.  Afternoon highs will top out in the lower 90s with
afternoon heat index readings rising over 100.  Isolated to
scattered convection will be possible during the period, but most
locations will remain mostly dry.

By midweek, the upper level ridge axis will be to our west and it
will continue to build northward into the inter-mountain west.  As
this occurs, synoptic scale troughing will be found across the Ohio
Valley and the eastern US. A cold front will push into the region on
Wednesday bringing at least scattered showers and storms.  The front
will slowly push south of the region by late Thursday with drier and
much less humid conditions arriving for Friday and into next weekend.

Look for highs to drop back in the upper 80s on Thursday with low-
mid 80s by Friday and into Saturday.

&&

.AVIATION /06Z TAFS THROUGH 12Z SUNDAY/...
Issued at 126 AM EDT Sat Jul 26 2025

VFR conditions are expected through most of the period. The only
threat to this will be an increased likelihood of isolated to
scattered showers and thunderstorms this afternoon/evening. Outside
of that, expect cu this afternoon with southwest winds reaching to
around 10 knots.

&&

.LMK WATCHES/WARNINGS/ADVISORIES...
KY...Heat Advisory until 8 PM EDT /7 PM CDT/ Sunday for KYZ023>040-
     045>047-053-054-061>065-070>076.
IN...Heat Advisory until 8 PM EDT /7 PM CDT/ Sunday for INZ076>079-
     083-084-089>092.

&&

$$

SHORT TERM...MJ
LONG TERM...MJ
AVIATION...KDW