textproduct: Paducah

KEY MESSAGES

- Another heatwave is set to kick off on Monday with an 80-100% chance of heat indices of 100+ by Tuesday and lasting through Friday.

- A Heat Advisory is in effect for Monday for the start of the prolonged heatwave. An Excessive Heat Watch is in effect Tuesday through Friday.

- Limited relief from the heat is expected this weekend with only isolated chances for showers/storms. Highs will likely remain in the lower 90s.

UPDATE

Issued at 618 PM CDT Sun Aug 30 2026

Updated Aviation discussion for the 00z TAF issuance.

DISCUSSION

Issued at 135 PM CDT Sun Aug 30 2026

A potent upper level ridge is slowly working its way over the area today and tomorrow and will remain overhead through the end of the work week. Another day of deep mixing today is leading to dewpoints in the lower to mid 60s and highs in the mid 90s. Southerly return flow on Monday brings a modest increase in moisture with dewpoints closer to 70 for the remainder of the week. Monday also kicks off another heatwave that lasts all week with limited relief by the weekend.

Heat indices are expected to climb to 100+ degrees Monday through Friday with the potential for some areas to see a heat index of 105 Tuesday through Friday. Overnight lows will be in record warm low territory in the mid 70s. A Heat Advisory is in effect for Monday area wide for the start of the prolonged heatwave. An Excessive Heat Watch is in effect Tuesday through Friday and may need to be upgraded to a Warning should confidence increase in more sites hitting a heat index of 105 for four days in a row. However, a key difference between this heatwave and the last one is the drier airmass this time around. NBM max temps and heat indices have trended up the last few runs with the lower dewpoints, compared to last time where max temps trended down as we approached the event with much higher dewpoints. The LREF probabilities of heat indices of 100+ degrees have increased to 80-100% Tuesday through Friday.

The EC and GFS have come into better agreement with the ridge shifting back west over the Plains starting Friday and continuing through the weekend. This brings only limited relief from the heat though with NBM showing an isolated 20-30% chance of showers/storms Friday and an isolated 15-20% chance on Saturday. Highs will likely continue to be in the lower 90s through the end of the weekend.

AVIATION /00Z TAFS THROUGH 00Z MONDAY/

Issued at 618 PM CDT Sun Aug 30 2026

Light S-SW winds around 3-5 kts will continue overnight under mostly clear skies. Winds will increase from the W-SW after 15z Monday as boundary layer mixing ramps up, sustained at 8-12 kts with gusts of 15-20 kts. FEW-SCT diurnal CU will develop, with bases around 7-10kft.

PAH WATCHES/WARNINGS/ADVISORIES

IL...Heat Advisory from 10 AM Monday to 10 AM CDT Tuesday for ILZ075>078-080>094. Extreme Heat Watch from Tuesday morning through Friday evening for ILZ075>078-080>094. MO...Heat Advisory from 10 AM Monday to 10 AM CDT Tuesday for MOZ076-086-087-100-107>112-114. Extreme Heat Watch from Tuesday morning through Friday evening for MOZ076-086-087-100-107>112-114. IN...Heat Advisory from 10 AM CDT /11 AM EDT/ Monday to 10 AM CDT /11 AM EDT/ Tuesday for INZ081-082-085>088. Extreme Heat Watch from Tuesday morning through Friday evening for INZ081-082-085>088. KY...Heat Advisory from 10 AM Monday to 10 AM CDT Tuesday for KYZ001>022. Extreme Heat Watch from Tuesday morning through Friday evening for KYZ001>022.