Forecast Discussion for ILN NWS Office
871
FXUS61 KILN 181943
AFDILN
Area Forecast Discussion
National Weather Service Wilmington OH
343 PM EDT Sun May 18 2025
.SYNOPSIS...
High pressure will remain over the area into Monday evening. Low
pressure will approach the area on Tuesday and move through Tuesday
night. A large upper level low dropping across the Great Lakes will
keep cool, unsettled conditions for Thursday and Friday.
&&
.NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
Stratocumulus will dissipate with the loss of heating leaving only
some high thin clouds through the rest of the night. Winds will
become light and veer around to the northeast. These conditions will
be favorable for some valley fog to develop. Temperatures will drop
into the upper 40s to lower 50s.
&&
.SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/...
Surface ridge extending across the area will shift east during the
latter part of Monday night. Short wave moving through a building mid
level ridge will pass across the area on Monday afternoon resulting
in an increase in clouds and the possibility of a few showers or some
sprinkles out a mid deck across the Tri-State. A narrow mid level
ridge will then translate across the area Monday night with another
short wave approaching late. This could start to spread some showers
into eastern Indiana, northern Kentucky, and parts of southwest Ohio
before daybreak Tuesday, although any rain that falls during that
time period would be light. Temperatures will be back into the upper
60s to mid 70s on Monday with lows in the upper 40s to mid 50s Monday
night.
&&
.LONG TERM /TUESDAY THROUGH SUNDAY/...
An active weather pattern will be in place during the long term. The
active pattern starts with the potential for severe weather on
Tuesday. There continues to be some variability with the models and
where the low will track. These differences in placement of the low
will have impacts on how far north across the region the severe
weather potential will be in place. The greatest confidence is
across northern Kentucky far southeastern Indiana and far southern
Ohio, however the if the low track is further north, the concern
will shift northward as well. There is at least some potential for
severe weather across most of the forecast area with less certainty
the further north in the forecast area. One other aspect that could
impact the severe weather potential is precipitation and clouds
earlier in the day. With the low moving across the region will
continue to highlight the threat for severe weather in the HWO.
There will be the potential for large hail, damaging winds, and an
isolated tornado cannot be ruled out. In addition, heavy downpours
could lead to potential localized flooding issues.
Precipitation chances continue on Wednesday. A frontal boundary
works through On Wednesday. Much cooler air will start to work in
aloft. There is some minimal instability and the potential for
thunder. There will also be the potential for some small hail as
well. Much of the rest of the long term will have several
disturbances working down through the region in a below normal
temperature pattern. This will mean almost daily precipitation
chances, a decent amount of cloud cover, and isolated small hail
potential at times.
&&
.AVIATION /19Z SUNDAY THROUGH FRIDAY/...
Stratocumulus with bases above 3kft will diminish towards 00Z. Only
expect some thin high clouds through the rest of the period. West
northwest winds will decrease as well and become light northerly,
eventually coming around to the northeast. Expect some valley fog to
cause visibility restrictions at KLUK between 08Z and 14Z.
OUTLOOK...MVFR ceilings and visibilities are possible Wednesday into
Thursday.
&&
.ILN WATCHES/WARNINGS/ADVISORIES...
OH...None.
KY...None.
IN...None.
&&
$$
SYNOPSIS...
NEAR TERM...
SHORT TERM...
LONG TERM...
AVIATION...
NWS ILN Office Area Forecast Discussion
