textproduct: Louisville

KEY MESSAGES

* Patchy fog is possible this morning and Sunday morning. Temperatures falling below freezing may cause slick spots to develop on elevated surfaces.

* High pressure will allow for dry weather through next week.

DISCUSSION

Issued at 245 AM EST Sat Nov 14 2026

===Patchy Fog May Bring Slick Spots on Roads===

Winds are calm to light and skies are nearly clear across the region at this hour. Due to these conditions, temperatures have dropped into the mid 30s. Temperatures are expected to continue falling into the upper 20s and low 30s by sunrise. Aloft, the upper troughing continues to pinwheel through the lower Ohio Valley and there is another shot of vorticity moving south from central Indiana this morning. This lift and narrow moisture layer has developed some lower-level clouds. These clouds will continue to push south and expand into the morning hours. Given these early morning conditions, it is possible that we will see some patchy fog development. Therefore, there may be some slick spots on the roads (especially elevated roads) this morning.

During the day today, upper troughing will begin to push northeast and surface high pressure will build in from the northwest. Residual moisture in the low levels will keep scattered to broken skies through most of the day (especially over the Bluegrass region). Increasing heights aloft, ample mixing, and sunshine will allow high temperatures to warm into the upper 40s and low 50s.

Tonight, winds will be light and skies mostly clear (except the Bluegrass). With ample radiational cooling, expect to see lows in the mid-upper 20s for most and low 30s in the Bluegrass. Patchy fog will be possible early Sunday morning. Given below freezing temperatures, areas of fog may bring slick spots on roads. Anyone traveling early Sunday morning should use caution.

===Dry and Warming Through Next Week===

Ridging will be featured over the central Plains on Sunday and will gradually push east and amplify through mid next week. At the surface, high pressure will gradually move into the Ohio Valley and intensify, reaching near 1036mb mid next week. This setup will allow for temperatures to warm 3-5 degrees each day through mid next week, reaching the mid-upper 60s. Calm and clear nights will allow for efficient radiational cooling, therefore, lows will be in the 20s and 30s.

Late next week, troughing will move through the Great Lakes region and force upper ridging and surface high pressure to push to the east. Conditions will remain dry through this period, though temperatures will continue to warm into the upper 60s and possible the low 70s.

AVIATION /18Z TAFS THROUGH 00Z MONDAY/

Issued at 1213 PM EST Sat Nov 14 2026

Mostly clear skies across the forecast area today, with mid-level cu field developing for LEX/RGA. Winds will remain out of the NW throughout the day, and become light to calm overnight tonight. A lower cloud deck will move in on the eastern half of the CWA tonight cause bordering MVFR conditions for LEX/RGA/SDF. REFS guidance is showing a 60-70% chance of ceilings below 3k ft for LEX and RGA, while SDF could stay VFR on the outskirts of the cloud deck.

LMK WATCHES/WARNINGS/ADVISORIES

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