textproduct: Louisville

KEY MESSAGES

* Isolated to scattered showers and a few thunderstorms will be possible this afternoon/evening across southern Kentucky. No severe weather is expected. Brief heavy rainfall and lightning would be the main hazards.

* A drier period of weather is expected tonight and into Sunday morning before another chance of showers/storms returns to southern Kentucky Sunday afternoon and Monday.

* Dry and comfortable weather with highs in the upper 70s to low 80s linger through Wednesday before dew points rise by late week and afternoon storms returning by the weekend.

SHORT TERM /THROUGH MONDAY NIGHT/

Issued at 229 PM EDT Sat May 30 2026

Afternoon satellite and observations show partly to mostly sunny skies across the region. Temperatures were generally in the upper 70s to the lower 80s. The exception was down in the far southern part of Kentucky where persistent cloud cover was keeping temperatures in the middle 70s in a few spots.

We still have a weak frontal boundary draped across the far southern part of Kentucky. Enough surface convergence is occurring to produce at least some isolated-scattered convection. For the remainder of the afternoon and evening hours, we expected this convection to continue, with the highest chances of precipitation occurring south of the Cumberland Parkway. Mid-level disturbance that brought the heavier rainfall to southern KY this morning will continue to drift southeast of the region, with drier air pushing into the area from the northeast. So we should see a decrease in convection as we move into the evening hours. For the overnight period, a continued drier northeasterly flow will continue and this should keep our weather dry for the overnight period. Lows tonight will feature a gradient across the region. Lows in the upper 40s to the lower 50s will be seen across the Bluegrass region. As you head southwest out of the Bluegrass into the I-65 corridor, overnight lows will be in the mid- upper 50s, with some low 60s down in the Bowling Green area.

Sunday through Monday Night...

For Sunday, we'll start the day off dry across the region as a mid- level ridge axis pushes eastward into the Ohio Valley. As this occurs, we'll see the aforementioned drier air from the northeast begin to weaken and this will allow for a more moist airmass to gradually work back into the region from the southwest. From a synoptic scale perspective, large scale ascent across the region will be rather scant. However, we'll likely see a strong moisture gradient set up across southern KY. With differential heating taking place during the afternoon, we'll likely see isolated- scattered convection fire across southern KY during the afternoon and evening. Highs on the day will be in the upper 70s to around 80 across southern Indiana and the northern half of Kentucky. Lower 80s are expected in areas south of the BG/WK Parkways.

For Sunday Night, we could see a few isolated/scattered areas of showers/storms in southern KY near the beginning of the period. During the overnight period, a mid-level wave sliding down the edge of the upper ridge axis centered to our west will likely bring another wave of showers/storms to the region toward dawn Monday and lingering into the morning hours. Depending on the speed of the upper wave, the afternoon may be a bit drier across the area in the wake of that wave. Lows Sunday night will be in the low-mid 50s in the Bluegrass region with upper 50s/lower 60s in the I-65 corridor and across the SW areas. Highs on Monday will again be in the upper 70s to the lower 80s with overnight lows Monday night dropping back into the mid-upper 50s.

LONG TERM /TUESDAY THROUGH FRIDAY/

Issued at 229 PM EDT Sat May 30 2026

Tuesday through Friday...

The synoptic weather pattern starting Tuesday morning settles into a breaking down omega pattern in the upper levels. As this occurs, high pressure from northern Canada will move south over the Great Lakes. Likewise, coming from a much cooler and drier area, this incoming air mass will cool our temperatures slightly and dry the CWA significantly for a period of a few days. Dry NE flow will drop PWAT values to near the 10th percentile of climatological values. The latest HREF ensemble mean brings PWATs down to near 0.5" across the CWA, with Tuesday afternoon dew points in the low to mid 50s. In other words, pleasant weather conditions are expected from Tuesday to Thursday morning. High temperatures will fair a little cooler or right at the climatological average Tuesday and Wednesday in the upper 70s to isolated low 80s.

Come Thursday afternoon, the surface high from Canada will continue moving south into the Southeast US, pushing warm moist air back into the CWA. Highs on Thursday will be a little warmer in the low to mid 80s, but more notably the dew points will raise again into the mid 60s or higher in a few places. RH will increase then and continue to rise into Friday afternoon. With SW flow continuing on Friday, and aided by a trough approaching from the west, rain chances slowly increase in the afternoon. Though not much rain is expected, with dew points on the rise and ample sunshine, garden variety pop-up storms are expected Friday afternoon. However, there is still too much uncertainty this far out to be specific with rainfall amounts, timing or any severe threat. Overall, one can expect more classic early summer weather feeling muggy along with afternoon storms. Highs on Friday will be in the mid 80s to upper 80s in a few areas.

Next Weekend...

Beyond Friday, there is a great deal of disagreement with individual models, noting the lack of strong steering flow in the upper to mid levels. The general trend is to keep southerly flow overhead with a broad trough approaching closely Saturday afternoon. Should models underestimate the strength of this SE high as they've done in the past, rain chances may be decreased or delayed until Sunday. There are suggestions of a wind shift from a cold front moving in from the north, though this also depends on the strength of that SE high. For now, expect warmer than average temperatures to linger into next weekend with near normal precipitation chances.

AVIATION /18Z TAFS THROUGH 00Z MONDAY/

Issued at 112 PM EDT Sat May 30 2026

For the afternoon hours, the northern TAF sites of HNB/SDF/LEX/RGA will see VFR conditions with generally a breeze out of the east- northeast. Still could see a few gusts up into the 15-18kt range over at LEX, but overall winds will slacken after sunset with VFR conditions continuing into tonight and into the day on Sunday.

For BWG, its close proximity to a stalled out frontal boundary and adequate moisture will lead to mainly VFR conditions, but scattered convection will be possible through the afternoon. Should see convective coverage diminish by evening with VFR conditions expected for the overnight period. Winds will remain out of the east to east- northeast at 5-8kts.

LMK WATCHES/WARNINGS/ADVISORIES

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