textproduct: Louisville

KEY MESSAGES

* Tuesday, overall drier and hotter conditions arrive as an upper ridge builds. A Heat Advisory has been issued for Tuesday and Wednesday.

* Heat remains through at least Thursday this week, before chances for showers and storms enter the forecast at the end of the week.

SHORT TERM /THROUGH TONIGHT/

Issued at 345 AM EDT Mon Sep 14 2026

Today, the axis of an upper ridge pushes east across the Midwest and into the Ohio Valley as surface high pressure slides over the Great Lakes. This will result in a sunny dry day over southern Indiana and central Kentucky with winds shifting from the north to the east. CAA will limit highs to the 80s.

Tonight, winds keep veering towards the southeast under clear skies. Light winds allow temperatures to fall into the mid 50s to upper 60s. The coolest temperatures are expected in the Bluegrass region with the warmest near Bowling Green.

LONG TERM /TUESDAY THROUGH SUNDAY/

Issued at 345 AM EDT Mon Sep 14 2026

Beginning Tuesday, the upper ridge becomes more positively tilted, the center of the upper high sits centered near the Tennessee Valley, and with surface winds veering to the southwest with the aforementioned surface high making it to New England, WAA pushes highs back into the 90s. Dew points reach back to the low to mid 70s, driving the heat index to the low 100s over western parts of the CWA. Little changes heading into Wednesday as the upper high drives farther north over the CWA, keeping elevated heat indices in place. Because of this and with communication with surrounding offices, the heat advisory has been extended into Wednesday.

Over the last couple of days the trend has been day by day pushing the upper high farther north, pushing first zonal flow and then a second upper ridge on Thursday farther north as well. In this upper flow, a west to east oriented front is expected to produce shower activity, and with the system's northward trend, it should help to keep most of the activity north of the CWA. The best chance for additional rain will come late in the week as a cold front could sag south into the Lower Ohio Valley either Thursday night or during the day Friday, but with a upper low over the Gulf pushing west, south of the high, it may help to keep the high over the Lower Ohio Valley longer, keeping us drier.

AVIATION /12Z TAFS THROUGH 18Z TUESDAY/

Issued at 648 AM EDT Mon Sep 14 2026

Upper ridging and surface high pressure will keep VFR conditions in place through the period. Winds out of the northeast will continue veering towards the east throughout the day.

LMK WATCHES/WARNINGS/ADVISORIES

KY...Heat Advisory from noon EDT /11 AM CDT/ Tuesday to 8 PM EDT /7 PM CDT/ Wednesday for KYZ023>030-038-045-053-061>064- 070>076. IN...Heat Advisory from noon EDT /11 AM CDT/ Tuesday to 8 PM EDT /7 PM CDT/ Wednesday for INZ076>078-083-084-089>092.