textproduct: Paducah

KEY MESSAGES

- Batches of thunderstorms producing heavy rain and some risk for severe weather (tornado/wind) are expected in waves today. The risk for heavy rainfall and flash flooding is increasing and a flash flood watch has been issued for parts of the area.

- 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 100 degrees through Thursday, followed by some relief on Friday.

- Another front approaches late Thursday or Friday and may produce another heavy rain and muted severe weather risk.

DISCUSSION

Issued at 120 AM CDT Mon Jun 8 2026

The overall synoptic picture is messy and unsettled and the forecast is similar. There is a sharp upper level low digging into southwest Missouri and a sharply diffluent zone to its east moving into our northwestern counties right now. Underneath that disturbance lies just pure soup with dewpoints at the surface 70 to 75 degrees with more advecting in from the southwest all the time. New convection is initiating in southwest Missouri behind the upper low where 3-6 km lapse rates presumably have steepened a little. There is a narrow area of reasonably favorable deep and low layer shear for isolated supercell type activity over our northwestern zones this morning and if that area of diffluence can help initiate surface based convection a brief severe weather/tornado threat may emerge before sunrise.

As the day wears on the upper low moves slowly eastward. The actual low gets overhead but residual diffluence below 300mb and the soupy airmass looks sufficient to initiate thunderstorms through the day with the best coverage likely over the eastern half of the area. As that is occurring the larger scale pattern starts to feel broader troughing over the Rockies keeping a moist conveyor belt going through the late afternoon and evening. A weak front aloft looks to act as a foci for showers and storms. Given the 2.1 to 2.3 inch PWATs indicated and the large warm cloud layer depth rainfall would be able to be extremely efficient. Each of the last few evenings as this low has rumbled around the area to our west and southwest it has sparked a few supercells and persistent heavy rainfall. I think we will have to be on guard for that to happen once again today. The best risk for any severe will along and just ahead of the upper low which looks to time out over roughly the eastern half of the CWA where a few damaging wind and isolated tornadoes appear possible.

HREF PMMs have steadily been trending upward on precip amounts in the eastern half of the CWA with some 3 to 4 inch swaths. This coupled with the overall picture suggests enough potential for flash flooding that will hoist a watch for parts of the area.

PoP trends are up a little on Tuesday morning as modest mid level height falls impact the area. MLCAPEs 2500-3000 J/kg with fairly weak deep shear, suggestive of at least some pulse severe threat. The highest heat levels of the year so far follow with heat index values around 100 each day through Thursday.

A shortwave trough pushes a cold front towards the area Thursday night into Friday. This looks like another potential heavy rain and modest severe weather threat. A cold front clears but almost immediately returns as a warm front into the weekend with another fairly strong shortwave on track for late Sunday for now.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 610 AM CDT Mon Jun 8 2026

Flight conditions continue to look dodgy today as a storm system moves overhead. Activity developing from around Marion to Hopkinsville will probably get a boost after sunrise as may other convection in the vicinity. The focus of that activity will track steadily northeast. It is likely to be replaced by another round of potential convection in the afternoon lasting into the evening. Slow moving storms may lead to IFR or worse visibility for an hour or more. Prevailing ceilings should be between about 1200 and 2400 ft with similar levels in thunderstorms. If enough instability can build gusty wind may become a factor in convection. Generally expecting some sort of trailing precip or off and on showers to then persist into much of the overnight.

PAH WATCHES/WARNINGS/ADVISORIES

IL...Flood Watch from 11 AM CDT this morning through Tuesday morning for ILZ075>078-080>083-085>087-089>091. MO...None. IN...Flood Watch from 11 AM CDT /noon EDT/ this morning through Tuesday morning for INZ081-082-085>088. KY...Flood Watch from 11 AM CDT this morning through Tuesday morning for KYZ007>022.