textproduct: Louisville

KEY MESSAGES

* Scattered snow showers continue this morning through the early afternoon. Snow accumulations from a dusting to a half of an inch is expected.

* Wednesday morning, a clipper system drops into the region, bringing light snow showers and a few tenths of accumulation. In the afternoon, snow showers will transition to rain.

* Temperatures will moderate through the remainder of the week with readings warming back into the 70s/80s by the weekend. The next chance of rain and maybe some storms looks to be Sunday/Monday with another front moving through the region.

SHORT TERM /THROUGH WEDNESDAY/

Issued at 308 AM EDT Tue Mar 17 2026

The upper trough remains over the region this morning and will push northeast by this afternoon. We are also seeing good moisture within the DGZ and in the low levels. Until the trough swing northeast, scattered to numerous light-moderate snow showers will continue through the morning hours. Mid-morning through the afternoon, showers will taper off from SW to NE. Additional snow accumulations of a dusting to about a half of an inch are expected. Some localized areas may see up to an inch.

Winds will continue to slacken through the day as the pressure gradient weakens. Though with lows this morning in the upper teens and low 20s, we will see minimum wind chills in the single digits over most of the region. Highs this afternoon will be in the 30s.

Tonight, winds will become light as a surface high passes SE over the region. Light winds will help lows to fall into the 20s. A shortwave riding along northwesterly flow aloft will bring a weak clipper system into the Ohio Valley Wednesday morning. This system will bring snow showers in the morning. Snow will transition to rain towards Wednesday afternoon, as southerly flow brings WAA. Looking to see a light dusting of snow to about a half of an inch in the northeastern 2/3 of the CWA. High temperatures on Wednesday will rebound to the 40s over most of the region and the low 50s over the far SW areas.

LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/

Issued at 308 AM EDT Tue Mar 17 2026

Northwest flow aloft will remain Thursday through the weekend. Another weak shortwave will bring a clipper system through on Thursday afternoon and evening. This will bring scattered rain showers mostly over the northeastern half of the region.

Continued southerly flow, WAA, and increasing heights aloft will allow temperatures to warm through the weekend. By the weekend we will likely see temperatures in the mid-upper 70s. Some southern areas may see 80 on Sunday.

On Sunday, a strong low pressure system will move across southern Canada and drag a cold front south through the Ohio Valley. A strong LLJ will move through the Ohio Valley and may bring gusty conditions on Sunday. Along the cold front, there will be another chance for showers and maybe a few storms. Will monitor this system over the coming forecast periods, as LREF clustering shows some instability and ample forcing. EFI shows a weak signal (though the sample period is within severe season, so this is likely more of a modest signal)

Once the cold front passes through, temperatures will cool and high pressure will bring dry conditions. Highs Monday will drop back down to the mid 50s.

AVIATION /12Z TAFS THROUGH 18Z WEDNESDAY/

Issued at 650 AM EDT Tue Mar 17 2026

Snow showers will continue to stream over the region. A few showers may bring moderately heavy snowfall and 1-3SM VIS. Current radar shows heavier showers along and north of I-64. These showers will continue to move ESE through the morning. Snow showers will begin to taper mid-morning and push into the far Bluegrass. Cloud coverage will dissipate from SW to NE through the afternoon. This evening, winds will become light as high pressure shifts over the region. Wednesday morning, a clipper system will bring snow showers to the region.

LMK WATCHES/WARNINGS/ADVISORIES

KY...Winter Weather Advisory until 9 AM EDT this morning for KYZ029>043-048-049-057. IN...None.