561
FXUS61 KILN 181817
AFDILN

AREA FORECAST DISCUSSION
National Weather Service Wilmington OH
217 PM EDT Tue Jun 18 2024

.SYNOPSIS...
Hot and humid air mass remains in place today with additional
rounds of storms possible. Humidity values will slightly
decrease on Wednesday and through the rest of the week, but
unseasonably hot daytime temperatures and mild overnight lows
will persist.

&&

.NEAR TERM /UNTIL 7 PM THIS EVENING/...
Temperatures have already soared into the middle 80s in many
locations this morning. Temperatures will continue to rise into
the low to middle 90s this afternoon. The combination of heat
and humidity will lead to heat index values around 100.
Continued the heat advisory across the region to account for the
heat.

Also with the heat and humidity there will be the potential for
thunderstorms again today. Will have to watch for heavy rain and
downburst winds once again today.

&&

.SHORT TERM /7 PM THIS EVENING THROUGH 6 PM WEDNESDAY/...
Shower/storm activity expected to wane Tuesday evening with the
loss of diurnal heating. Expect another night of very mild low
temperatures in the middle 70s for most.

Even though the center of the surface high pressure system
drifts slightly eastward into the Atlantic on Wednesday, the
system continues to strengthen and will still increase pressure
values across our CWA. The positioning of the high will
actually lead to a subtle wind shift, becoming more
southeasterly. This will lead to a (very) minor relief in
humidity values, decreasing dewpoints by a couple degrees
compared to Tuesdays values. Precip activity will be even more
limited on Wednesday, mainly focused northwest of I-71.

Heat Advisory will continue through the period even though HI
values exceeding 100 degrees will be limited on Wednesday. The
prolonged heat wave is the primary factor for keeping the heat
headlines active.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/...
Expansive upper ridge will retrograde during the latter part of the
week and get suppressed south as a trough emerges out of the
Canadian Rockies on Saturday. Hot conditions will be persistent
during this period. Daytime highs will nudge upwards just slightly
with Friday and Saturday likely being the hottest days. Dew points
are forecast to remain in the mid to upper 60s which results in a
heat index mainly in the 95 to 100 range. Lows will generally be in
the lower 70s with some urban areas remaining in the mid 70s. Heat
advisory remains in effect through Friday although there is a high
likelihood that it will be extended into Saturday at some point this
week. Isolated diurnal convection is not out of the question along
the periphery of the ridge, so for far northern counties.

Trough will deepen but remain progressive as it moves east southeast
across the Great Lakes and into New England late in the period. This
will drive a cold front through the area Sunday afternoon and
evening with showers and thunderstorms occurring ahead of it. High
pressure will then build in for Monday.

&&

.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
Cu have started to develop and there are also high clouds across
the region. Isolated to scattered showers and thunderstorms will
develop this afternoon and continue in some places into the
overnight hours. Timed out precipitation in the TAFs. Outside of
thunderstorm activity winds will generally be around 10 knots or
less. Limited any fog mention overnight to a tempo MVFR vsby at
the river valley location of KLUK, however confidence was not
high. Additional thunderstorms will be possible Wednesday
afternoon.

OUTLOOK...Thunderstorms possible on Sunday.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...Heat Advisory until 8 PM EDT Friday for OHZ026-034-035-042>046-
     051>056-060>065-070>074-077>082-088.
KY...Heat Advisory until 8 PM EDT Friday for KYZ089>100.
IN...Heat Advisory until 8 PM EDT Friday for INZ050-058-059-066-
     073>075-080.

&&

$$
SYNOPSIS...Clark
NEAR TERM...
SHORT TERM...Clark
LONG TERM...
AVIATION...