textproduct: Louisville

KEY MESSAGES

* Winter Weather Advisory has been expanded slightly westward and extended until 1 PM EST.

* Wednesday, a cold front brings limited rain chances north of the parkways.

* Cooler air arrives for the weekend. Highs in the teens and lows in the single digits are possible for some.

SHORT TERM /THROUGH TONIGHT/

Issued at 419 AM EST Mon Dec 8 2025

As a shortwave in the upper trough begins to push east into the Lower Ohio Valley, we are beginning to see an increase in returns on radar as saturation is starting to reach the DGZ. Temperatures have continued to fall from near 40 at 2z to just above freezing along Interstate 64. The cooling trend will continue as precipitation chances increase in the coming hours. Snow will develop over southern Indiana and over most of central Kentucky northeast of Bowling Green. Accumulations are expected to range from a dusting to slightly over an inch with the highest amounts expected in the Bluegrass.

Early this afternoon, precipitation will push east out of the CWA. Skies will try to clear from the northwest to southeast throughout the day, but continued northerly winds will limit high temperatures to the 30s.

Tonight, surface high pressure, centered over Michigan and western New York and extending southwest to eastern Texas, will be over southern Indiana and central Kentucky. This will calm winds under mostly clear skies, leading to radiative cooling. Temperatures fall into the upper teens to mid to upper 20s with the coolest temperatures over the Bluegrass.

LONG TERM /TUESDAY THROUGH SUNDAY/

Issued at 419 AM EST Mon Dec 8 2025

Tuesday, with the surface high east of Kentucky and a surface low over the western Great Lakes, the pressure gradient over the Lower Ohio Valley will drive southwest wind gusts to around 25 mph. Even with some early cloud cover, high temperatures will rocket to the low 40s to near 50.

Wednesday, northwest flow will carry a low pressure system near the Indiana/Michigan border. This will drag the systems cold front through the CWA during the day, and with strong WAA in place ahead of the front, highs are expected to be in the mid 40s to mid 50s, leaving precipitation all rain. Behind the front, Wednesday night, CAA drops lows back below freezing with temperatures in the mid to upper 20s.

Thursday and Friday continue to show a decent amount of uncertainty in model guidance. Northwest flow remains in place, funneling additional light precipitation chances towards southern Indiana and central Kentucky, and with temperatures during the day being slightly above freezing and slightly below at night, there could be some mixed p-types. The better signal is will cooler temperatures heading into the weekend.

This weekend, upper ridging continues to amplify over the West Coast, keeping northwest flow through the CWA. Arriving Canadian air is expected to drop high temperatures into the upper teens and 20s with lows in the single digits to teens for some.

AVIATION /12Z TAFS THROUGH 18Z TUESDAY/

Issued at 648 AM EST Mon Dec 8 2025

As a shortwave pushes east through the region, snow showers continue moving over SDF, LEX, RGA, and soon BWG. Snow at HNB has already ended. Ceilings remain in the IFR to MVFR range with improvements behind the snow. Visibilities are dropping as snow rates increase. Winds will remain out of the north through the day before flipping to the south tonight.

LMK WATCHES/WARNINGS/ADVISORIES

KY...Winter Weather Advisory until 1 PM EST this afternoon for KYZ035>037-039>043-049. IN...None.