textproduct: Paducah

KEY MESSAGES

- The dangerous heatwave will continue through the remainder of the week with a Heat Advisory in effect through Friday. There is a 70- 90% chance headlines will need to be extended into Saturday.

- Several record warm overnight low temperatures are possible this week in the mid 70s.

- Low rain chances likely hold off for most of the region until late Saturday into Saturday night, with a 20-30% chance of rainfall exceeding a tenth of an inch where isolated to scattered showers and thunderstorms occur.

DISCUSSION

Issued at 1245 AM CDT Tue Sep 1 2026

The dangerous heatwave will continue through the remainder of the week with a stout ridge of high pressure in control over the lower Ohio Valley. A Heat Advisory remains in effect for the entire CWA through Friday for heat index values ranging from 100-108, with most locations around 103-106 on average. Compared to Monday, model soundings support an even deeper dry adiabatic layer upwards of 700 mb, where the NAEFS indicates 30-year return intervals for temperatures that fall above the 99th percentile. Given more sufficient compression at the sfc and the potential to mix down slightly lower dewpoints in the upper 60s during peak diurnal heating, daily highs ranging from the upper 90s to locally 100 degrees are probable. Should afternoon dewpoints remain more elevated in the lower 70s, a upgrade to an Extreme Heat Warning may need to be considered as this forecast package has been blended towards CONS guidance. For now, locations exceeding a daily heat index of 105 is still too sporadic until the latter half of the week, but there will be exceptions locally. Several record warm overnight low temperatures are also possible this week in the mid 70s.

As for the potential for rain chances that will bring some relief, the ECMWF has trended more towards the GFS with the bulk of the chances holding off until late Saturday into Saturday night. The delay of the ridge breaking down means a 70-90% chance on the LREF for needing to extend the heat headlines into Saturday. Shower and thunderstorm chances will also be pretty hit or miss, with a 20-30% chance of rainfall amounts exceeding a tenth of an inch on the GEFS/EPS. Depending on how quickly a cold front moves through on Sunday that will bring an end to the heatwave, rain chances may linger.

AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/

Issued at 506 AM CDT Tue Sep 1 2026

Mostly sunny skies with FEW diurnal cu around 8 kft AGL is forecast today. Winds will be SSW around 5-9 kts. Clear skies are expected again tonight with winds diminishing below 5 kts.

PAH WATCHES/WARNINGS/ADVISORIES

IL...Heat Advisory until 8 PM CDT Friday for ILZ075>078-080>094. MO...Heat Advisory until 8 PM CDT Friday for MOZ076-086-087-100- 107>112-114. IN...Heat Advisory until 8 PM CDT /9 PM EDT/ Friday for INZ081-082- 085>088. KY...Heat Advisory until 8 PM CDT Friday for KYZ001>022.