textproduct: Paducah

KEY MESSAGES

- Batches of thunderstorms producing heavy rain and some risk for locally damaging wind gusts are possible this afternoon into this evening.

- The hottest stretch of the season begins on Tuesday with high temperatures nearing 90 degrees. A combination of the heat and humidity will cause daily heat index values to rise around 105 degrees at times through Thursday, followed by some relief on Friday.

- With the hot and humid airmass providing plenty of instability Tuesday afternoon, a few storms could be strong to locally severe with winds to 60 mph the main threat.

DISCUSSION

Issued at 246 PM CDT Mon Jun 8 2026

Afternoon visible imagery shows an MCV south of St. Louis, which is promoting thunderstorm coverage in southeast MO. We expect convection to redevelop ahead of this feature this afternoon as it encounters a fairly unstable airmass in western KY (MLCAPE 1500- 2000). Model soundings show weak lapse rates and high PWAT values, thus heavy rainfall is the main conern with perhaps some wet loaded microburst potential in the strongest storm cores. With high warm cloud depths, and PWATs above the climatological max for this time of year, these will be very efficient rain producers this evening into tonight. A Flood Watch remains in effect for much of the area through tonight to account for this heavy rain threat.

On Tuesday, there is some uncertainty in how the setup will play out. The latest high-resolution guidance suggests a remnant outlow, on the backside of the passing MCV may help force renewed convection especially in the eastern part of the CWA. Further west, confidence is higher in some potentially dangerous heat building. Dewpoints well into the 70s coupled with temperatures in the upper 80s to low 90s should promote heat index values pushing 105 at times. Therefore, a Heat Advisory has been issued for Tuesday afternoon/evening. Given the expected hot/humid airmass, instbility will also be fairly strong and coupled with at least modest deep- layer shear, a few severe storms capaoble of locally damaging winds will be possible Tuesday afternoon.

Wednesday and will feature a weak ridge attempting to build in front the southwest. This brief ridging aloft should at least temporarily reduce the chances for thunderstorms on Wednesday afternnon, but this dry time will be short lived as heights aloft slowly fall and a surface cold front approaches for late Thursday into Friday. This forcing will bring renewed threats for thunderstorms as the front pushes through Thursday into Friday. The good news about this round of convection is that mean layer wind fields will be slightly stronger, meaning storms should have quicker motions and thus less potential for training. The downside to this is wind shear will be a little higher than with this system (20-30 knots), thus we will have to watch for at least a low-end threat of severe weather late Thursday and into Friday along the front. Uncertainty remains fairly high this weekend and beyond as guidance is dispersive on the degree of upper-level troughing moving into the region, so for now will carry some chance pops through the weekend.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 1235 PM CDT Mon Jun 8 2026

While showers are moving out of the Quad State to the northeast, isolated to scattered showers and storms are developing at this time. Cigs are predominantly MVFR with patches of IFR in the east. Vsby drops will accompany heavier showers or storms. Thunderstorm activity is most likely late afternoon and later in the evening. Cigs will generally be MVFR but some improvement is likely in the morning once showers end. Southerly winds shift towards southwesterly later in the TAF period and generally hover around 10kts during the day and a little lighter overnight.

PAH WATCHES/WARNINGS/ADVISORIES

IL...Flood Watch through Tuesday morning for ILZ075>078-080>094. Heat Advisory from 11 AM to 8 PM CDT Tuesday for ILZ080-084- 088-092-093. MO...Flood Watch through Tuesday morning for MOZ076. Heat Advisory from 11 AM to 8 PM CDT Tuesday for MOZ076-086- 087-100-107>112-114. IN...Flood Watch through Tuesday morning for INZ081-082-085>088. KY...Flood Watch through Tuesday morning for KYZ002>022. Heat Advisory from 11 AM to 8 PM CDT Tuesday for KYZ001>004.