textproduct: Louisville

KEY MESSAGES

* Pleasant and dry weather will continue through at least Tuesday with highs in the mid to upper 70s and mostly clear skies.

* Temperatures will begin to warm back into the 80s mid week ahead of rain chances returning Thursday.

SHORT TERM /THROUGH MONDAY NIGHT/

Issued at 304 AM EDT Sun Sep 27 2026

Today - Monday Night

Surface high pressure and northeasterly flow continues over the Ohio Valley. Daytime maximum temperatures will remain in the upper 70s to 80 degrees. The combination of high pressure and dry air mass near the surface will keep skies mostly clear. Furthermore, dewpoints are expected to dip into the upper 30s this afternoon with RH values between 20% - 30%. Nighttime low temperatures will cool into the mid 50s with the assistance of radiational cooling with clear skies. Monday will be a rinse and repeat of today as the region remains in this pattern. Most areas are expected to warm near 80 due to clear skies and overachieving temperatures.

LONG TERM /TUESDAY THROUGH SATURDAY/

Issued at 304 AM EDT Sun Sep 27 2026

Tuesday - Wednesday Night

The surface high pressure will begin to shift eastward on Tuesday which in turn brings a southerly flow back into the region. By Wednesday afternoon, flow aloft will be out of the southwest bringing warmer temperatures and moisture. Maximum temperatures are expected to warm into mid to upper 80s Wednesday afternoon. There is a chance of temperatures overachieving again due to deep mixing heights leading to dry air mix down.

Thursday - Saturday

A low pressure system that develops over the Plains mid week will continue to move eastward. The associated weak ridging over the Ohio Valley will then collide with a shortwave disturbance moving through the Great Lakes region. Rain chances will return Thursday evening/night ahead of an associated frontal boundary. The region will then be set in a zonal flow aloft by late week, which will result in lingering rain showers through the weekend. QPF totals through the end of the week are ranging from 1-1.5 inches across the CWA. By Sunday, guidance is showing signals of shortwave troughing that will eject into the Ohio Valley, along with the jet stream digging south into the region. This would lead to more rain chances and likely cooler temperatures if a strong enough cold front were to push through. There is low confidence in this system at this point.

AVIATION /18Z TAFS THROUGH 00Z TUESDAY/

Issued at 101 PM EDT Sun Sep 27 2026

VFR conditions and relatively light NNE winds are expected to prevail through the TAF period. A brief 10-15 kt gust is possible this afternoon over SDF and LEX, though confidence is too low to include in the TAF. Patchy fog could also develop tonight, but is currently not expected to develop over the terminals.

LMK WATCHES/WARNINGS/ADVISORIES

KY...None. IN...None.