604
FXUS63 KLMK 060622
AFDLMK

Area Forecast Discussion
National Weather Service Louisville KY
222 AM EDT Sun Sep 6 2026

.KEY MESSAGES...

* Cooler and much drier air moves in today with another quick
  heatwave moving in Tuesday-Wednesday

* Next solid rain chance comes Wednesday Night-Thursday as another
  cool front swings through the region

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 222 AM EDT Sun Sep 6 2026

Waiting patiently for the dry air to get into our area early this
morning. GOES Sounder data still has a general 1.4-1.6" precipitable
water over all of the area, but a sharp gradient is inching closer
to southern IN/OH this hour, with readings of 1.1-1.2" north of that
gradient. Increasing north to northeast winds this morning and the
rest of the day will, along with a deep northerly flow aloft, pull
that drier air down and bring an end to measurable rain chances by
this afternoon.

Temperatures will run much cooler, breaking our streak of hot days.
Looking at readings in the mid 80s for the I-64 corridor and upper
90s as you get closer to BWG. The lower dewpoint air will allow for
overnight lows to fall off quickly too, bottoming out in the lower
60s for most, save for SDF and BWG area.

&&

.LONG TERM /MONDAY THROUGH SATURDAY/...
Issued at 222 AM EDT Sun Sep 6 2026

High pressure moving across the Great Lakes region will keep us dry
and cooler Monday, but then it will shift eastward as we go to
midweek. An upper ridge over the Central U.S. also will shift
eastward. The combination of higher thicknesses and southerly winds
will bring a return to above normal temperatures for Tue/Wed.

The upper ridge does look to flatten out Wed/Thu, as another cool
front drops into the Midwest. Passage looks to be in the Wed.
night/Thursday time frame. Troughing aloft may bring yet another
cool front Friday night/Saturday.

&&

.AVIATION /06Z TAFS THROUGH 12Z MONDAY/...
Issued at 119 AM EDT Sun Sep 6 2026

Winds still light and variable for most sites this hour, but expect
a general north to northeasterly wind to set up in the next few
hours, becoming gusty by late morning as high pressure builds in to
the region. Model cross sections still show a thick low-level cloud
deck developing in the next few hours as well. Starting to see a mid
deck over KLEX and expect KSDF to follow suit an hour or two later.
KBWG, with the evening rains and a brief clear out should see some
fog develop and then transition to stratus deck. Drier air filtering
in with those winds eventually should think out any cloud decks by
early to mid afternoon.

&&

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

&&

$$

SHORT TERM...RJS
LONG TERM...RJS
AVIATION...RJS