textproduct: Louisville

KEY MESSAGES

* Patchy frost will be possible early Friday and Saturday mornings, mainly in sheltered rural areas. * Dry weather continues through next Thursday. Expect chilly nights and warm afternoons. Patchy fog will be possible each morning, mainly in river valleys.

DISCUSSION

Issued at 259 AM EDT Fri Oct 23 2026

We're in the midst of a tranquil stretch of weather. Very little has changed since the last update. Skies are clear, and winds are calm. Sprawling high pressure at the surface remains in place over the eastern US and Canada. In the upper levels, a large ridge sits over the central CONUS.

The mid/upper level ridge is forecast to slowly build eastward over the Ohio Valley through the end of the weekend. The strong sfc high will build south through the weekend, becoming centered over the Northeast US. During the early to middle portion of next week, ridging will remain in place while gradually weakening with time. The upper level flow deamplifies, and multiple upper level disturbances will traverse portions of the western and north-central US. While we could see increasing high clouds at times, a dry low- level airmass will keep us dry through next Thursday.

In short, very pleasant Fall weather continues through the middle of next week. Afternoon highs in the low to mid 70s will be common, with early morning lows in the 40s. Our coolest, sheltered valleys in the Bluegrass and Lake Cumberland regions should see some mid to upper 30s once again early this morning and again Saturday morning. This may produce patchy frost in those areas.

Forecast confidence has increased slightly in our next chance of rain arriving over Halloween weekend. A wave of low pressure ejecting northeast out of the southern/central Plains could finally draw some moisture into the Ohio Valley. About 40-50% of LREF members bring us some measurable rainfall by Sunday, November 1st.

AVIATION /12Z TAFS THROUGH 18Z SATURDAY/

Issued at 652 AM EDT Fri Oct 23 2026

HNB will start the period with lower vis in fog. Otherwise, today will feature VFR weather with clear skies and light NE winds. NE winds will increase to 5-8 kts this afternoon. HNB should see at least brief vis drops again early Saturday morning, most likely after 08-09Z.

LMK WATCHES/WARNINGS/ADVISORIES

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