textproduct: Paducah

KEY MESSAGES

- Dangerously hot and humid conditions this afternoon will be followed by much cooler conditions through the remainder of the week with lower humid levels. The Extreme Heat Warning and Heat Advisory expires this evening.

- There is a 20-30% chance for scattered showers and isolated thunderstorms this evening, mainly over southeast Missouri. Rainfall amounts will be light.

- More unsettled weather with daily rain chances returns Friday into early next week, with a 60-70% chance peaking Friday night into Saturday.

DISCUSSION

Issued at 1138 AM CDT Tue Jul 28 2026

The extreme heat will come to an end after today as a cold front moves across the FA. Dewpoints will gradually begin to lower a few degrees this afternoon with mixing in the boundary layer tapping into a dry layer around 750 mb, followed by additional dry air advection overnight. A H5 impulse also rounds a 594 dm ridge parked over the southwest Plains this evening that will provide modest lift for a few scattered showers and perhaps an isolated thunderstorm. Have limit NBM PoPs to a 30% confined to SEMO as most of the CAMs keep things dry with the HRRR being the most aggressive.

Behind the front, a broad upper level trough sets up over the Ohio Valley with persistent northwest flow as the aformentioned ridge shifts more west. Daily high temperatures will range from the low to mid 80s through the weekend with much needed relief from the humidity. Dewpoints mix down into the lower 60s until Friday. While a weak area of sfc high pressure will provide ample dry conditions Wednesday and Thursday, daily rain chances make a return Friday and continue into early next week as H5 energy moving onshore over northern California this evening is progged to develop into a cutoff low over the FA over the weekend. The greatest rain chances by the NBM peak at a 60-70% Friday night into Saturday, with each afternoon favoring the highest risk through the remainder of the period.

AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/

Issued at 611 PM CDT Tue Jul 28 2026

VFR conditions expected through the end of the period. A deck of high clouds across the region will give way to clearer skies overnight. Winds will remain light out of the north and shift more northeast for tomorrow. Some upper level smoke may affect the region tomorrow.

PAH WATCHES/WARNINGS/ADVISORIES

IL...Heat Advisory until 7 PM CDT this evening for ILZ075>078-082- 083-086-087. Extreme Heat Warning until 7 PM CDT this evening for ILZ080- 081-084-085-088>094. MO...Extreme Heat Warning until 7 PM CDT this evening for MOZ076- 086-087-100-107>112-114. IN...Heat Advisory until 7 PM CDT /8 PM EDT/ this evening for INZ081-082-085>088. KY...Heat Advisory until 7 PM CDT this evening for KYZ014>016- 018>022. Extreme Heat Warning until 7 PM CDT this evening for KYZ001>013-017.