textproduct: Paducah

KEY MESSAGES

- A Heat Advisory remains in effect through Sunday evening for daily heat index values between 103-109 degrees. High temperatures during this period will range from the mid 90s to near 100 degrees.

- There is a 20% chance of an isolated shower or thunderstorm this afternoon and Friday afternoon and evening, mainly north along I-64.

- More scattered rain chances across the entire region arrives on Monday, with a 30-40% chance of showers and thunderstorms peaking Monday afternoon into Monday night.

- Relief from the heat wave begins to arrive on Monday into Tuesday, with temperatures trending more seasonable by the middle of next week with highs in the 80s.

DISCUSSION

Issued at 1233 PM CDT Thu Sep 17 2026

A stout 597 dm ridge of high pressure remains in control across the FA this afternoon with near record to record temperatures ranging from the mid 90s to near 100 degrees. Dewpoints will remain more elevated through Friday around 70 degrees, translating to daily heat index values of 103-109 degrees. While the ridge begins to breakdown over the weekend, temperatures will remain 10-15 degrees above normal. With a backdoor frontal boundary making its approach Friday, the only noteworthy change will be slightly lower dewpoints over the weekend in the mid 60s. Despite the drier air, heat index values will remain around 100 degrees through Sunday. For these reasons, a Heat Advisory remains in effect until Sunday evening as the late season dangerous heat wave prevails.

Meanwhile, the aformentioned sfc boundary to the north will be close enough to trigger a 20% chance of isolated showers and thunderstorms this afternoon and Friday afternoon and evening, mainly along I-64. Coverage will be sparse at best, but a greater risk arrives on Monday as a much stronger cold front approaches the FA. Rain chances peak at 30-40% chance Monday afternoon into Monday night on the NBM, as there is currently some uncertainty in the timing of the front. The good news is relief arrives by Tuesday with temperatures turning more seasonable, but rain chances may linger. There is however a large spread on the NBM distribution as the ECMWF tries to build the ridge back in while a trough prevails more on the GFS with a unsettled pattern for the latter half of next week.

AVIATION /18Z TAFS THROUGH 18Z FRIDAY/

Issued at 1233 PM CDT Thu Sep 17 2026

VFR conditions prevail with intermittent mid-level clouds across the region. Some of the model guidance is hinting at MVFR/IFR fog at KCGI Friday morning, but confidence is too low to include TAF mention at this time. Winds turn light & variable tonight, increasing to 4-5 kts after sunrise Friday morning.

PAH WATCHES/WARNINGS/ADVISORIES

IL...Heat Advisory until 7 PM CDT Sunday for ILZ075>078-080>094. MO...Heat Advisory until 7 PM CDT Sunday for MOZ076-086-087-100- 107>112-114. IN...Heat Advisory until 7 PM CDT /8 PM EDT/ Sunday for INZ081-082- 085>088. KY...Heat Advisory until 7 PM CDT Sunday for KYZ001>022.