textproduct: Jackson

KEY MESSAGES

- Hot and humid weather persists at quite oppressive levels through the rest of the week, likely peaking on Thursday.

- Mostly dry weather is anticipated through Thursday, before chances for showers and storms return to end the week.

UPDATE

Issued at 619 AM EDT WED JUL 1 2026

No major changes needed for this update. However, did issues an SPS for locally dense fog given some of the KYTC cams and observations. This fog will lift between 8 and 9 am and we will be left with mostly sunny skies.

LONG TERM

(Thursday night through Tuesday) Issued at 315 AM EDT WED JUL 1 2026

As well noted by now, high pressure has been perched over the area through the better part of the week. By Thursday evening shortwave energy passing to the north, in the Upper Great Lakes, will have flattened the ridge as it also slowly nudges off to the east. Patchy valley fog may develop around or near the typically river valley locations.

By Friday, models and ensembles depict the area of high pressure over the coastal Carolinas. By Saturday the high progresses further east out over the Atlantic, as a surface low over the Lower Great Lakes region, features a cold front trailing back across the Ohio Valley. While the departure of the dominant high pressure leads to some reprieve from hot temperatures, it will remain hot and muggy.

Each afternoon, scattered storm chances return as storms will generally be diurnally driven. With modeled PWAT around 1.6 inches, storms will have the potential to produce breif yet heavy downpours. In fact, the WPC has issued a Day 5 Marginal Risk (level 1 of 4) for Excessive Rainfall. They note in their discussion that they're casting a wider net to account for a potential MCS with training storm potential. A series of shortwaves will bring continued scattered storm chances through next Tuesday.

Temperatures Friday and Independence Day will likely range from the mid to upper 90s, with Friday the hotter of the two days. Temperatures warm into the upper 80s to low 90s Sunday and beyond, as Eastern Kentucky gets out from under the thumb of the persistent high pressure. In the evenings, temperatures generally remain in the low 70s.

AVIATION

(For the 12Z TAFS through 12Z Thursday morning) ISSUED AT 807 AM EDT WED JUL 1 2026

High pressure will keep weather quiet through the TAF period. We are seeing some mostly river valley fog sneak into some of the TAF sites this morning and this is causing some temporary restrictions. This fog will lift over the next hour and sites will be left with VFR skies through the TAF period. We will have some afternoon cumulus this afternoon, but these should be above MVFR levels. They will also struggle to rise given the inversion in place. There could another night of temporary restrictions late tonight into Thursday morning, but did not include in the TAFs given uncertainty. This high pressure will also provide light winds through the period generally below 5 knots.

JKL WATCHES/WARNINGS/ADVISORIES

Extreme Heat Warning until 8 PM EDT Friday for KYZ044-050>052- 058>060-068-069-079-080-083>088-104-106>120.