560
FXUS61 KILN 041039
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
639 AM EDT Thu Jun 4 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...
1) Mainly dry conditions will continue through Friday as
temperatures gradually warm. A chance for showers and thunderstorms
will return over the weekend.

&&

.DISCUSSION...
KEY MESSAGE 1)
Mid level blocking pattern will break down as the western part of the
omega opens up and sends energy eastward which will suppress the
ridge that is extending across the area. Low level ridge will shift
southeast resulting in southwest flow developing. This will bring
slightly warmer temperatures over the next few days as well as
increased low level moisture.

Short wave traversing the northern tier of the US will dig a bit as
it moves across the Great Lakes into the Northeast Friday night into
Saturday night. Associated surface front will make faster progress on
its northern end which will result in the boundary laying out in a
more east-west fashion across the lower Great Lakes. This front will
sag into the forecast area Saturday night and then stall and weaken
as mid level heights quickly rise again on Sunday.

Convection ahead of the front Friday night could make it into
northwest counties late Friday night/early Saturday in a weakening
phase. Renewed showers and storms are expected to develop with
heating on Saturday with the greater coverage across northern
counties closer to the boundary. It appears that some weakening
activity will continue through Saturday night near the front.
Additional diurnal convection will be possible on Sunday although
with greater uncertainty due to questions about where and to what
degree the boundary remains in tact.

Pattern gets a bit messy with greater uncertainty heading into next
week. But latest guidance suggests that as quick as upper ridging
develops, it will slide east allowing some short wave energy to pass
near the area. With above normal temperatures and persistent low
level moisture, the potential for diurnal convection will continue.

&&

.AVIATION /12Z THURSDAY THROUGH MONDAY/...
VFR will continue. Cannot rule out a few high based cumulus
developing during peak heating, but most likely will just continue to
see thin cirrus. Light winds will become south southwest at less
than 10 kt during the day and then decrease towards 00Z.

OUTLOOK...Thunderstorms possible both Saturday and Sunday.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...Air Quality Alert until midnight EDT tonight for OHZ042-043-051-053-
     060>062-070-071-077-078.
KY...Air Quality Alert until midnight EDT tonight for KYZ091>093.
IN...Air Quality Alert until midnight EDT tonight for INZ074.

&&

$$

DISCUSSION...35
AVIATION...35