textproduct: Louisville

KEY MESSAGES

* Dry and pleasant conditions are expected to continue through Tuesday.

* Warmer temperatures (mid to upper 80s) and chances for showers and storms return by mid week.

SHORT TERM /THROUGH TUESDAY NIGHT/

Issued at 232 PM EDT Sun Aug 23 2026

Calm winds and clear skies will allow for the potential of fog development tonight. Patchy fog and areas of valley fog are expected through the early morning hours, especially north and west of I64.

Surface high pressure will remain over the Ohio Valley with an upper level trough to the NE and a ridge to the west. Northwesterly flow will keep high temperatures in the mid 80s, and lows in the upper 50s low 60s through Tuesday afternoon. Dewpoints will remain in the mid to upper 50s allowing for a very pleasant and comfortable start to the work week.

LONG TERM /WEDNESDAY THROUGH SATURDAY/

Issued at 232 PM EDT Sun Aug 23 2026

As the surface high pressure moves off to the east, an upper level trough and low pressure system will move into the Great Lakes region. A shortwave disturbance and frontal boundary will bring rain chances back into the forecast for the later half of the week.

By Wednesday afternoon/evening, southwesterly flow will return and bring moisture back into the region. PWAT values are expected to be back above 1" for the remainder of the week. A weak upper level disturbance will move through the region Wednesday into Thursday bringing scattered showers and storms. At this time, no severe threats are expected. Thursday evening, a cold front will begin to push into the Ohio Valley allowing for another round of rain and possible storms. Guidance is currently showing ample instability for storm development, however effective bulk shear is weak. Therefore, any storms that do form could have the potential to become strong but severe threats are not currently expected.

Post frontal boundary, daytime temperatures are expected to remain around normal in the mid to upper 80s. A drier airmass will also likely move in for a pleasant day on Saturday.

AVIATION /18Z TAFS THROUGH 00Z TUESDAY/

Issued at 131 PM EDT Sun Aug 23 2026

VFR conditions and light NW winds generally 5-10 kt are expected to continue this afternoon and evening. Winds should become light and variable overnight, with VFR conditions likely at most terminals. There is a chance for MVFR or lower visibilities due to patchy fog before sunrise Monday, mainly at HNB, though confidence in this is low given drier air mixing down this afternoon. Light winds and VFR conditions are expected again during the day on Monday.

LMK WATCHES/WARNINGS/ADVISORIES

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