National Weather Service Forecast for: Lancaster, OH Issued by: National Weather Service Wilmington, OH

Updated: 6:49 pm EDT Jul 10, 2026

Saturday Chance Showers And T-Storms Sunday Mostly Sunny then Slight Chance Showers And T-Storms Monday Mostly Sunny Tuesday Sunny Wednesday Sunny Thursday Slight Chance Rain Showers then Slight Chance Showers And T-Storms Friday Chance Showers And T-Storms   Hi 84 °F Hi 85 °F Hi 86 °F Hi 90 °F Hi 91 °F Hi 89 °F Hi 87 °F   Tonight Chance Showers And T-Storms Saturday Night Slight Chance Showers And T-Storms then Mostly Cloudy Sunday Night Slight Chance Showers And T-Storms Monday Night Mostly Clear Tuesday Night Clear Wednesday Night Mostly Clear Thursday Night Slight Chance Showers And T-Storms then Partly Cloudy   Lo 68 °F Lo 65 °F Lo 66 °F Lo 67 °F Lo 70 °F Lo 72 °F Lo 69 °F

Forecast from NOAA-NWS for Lancaster, OH.

688
FXUS61 KILN 102344
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
744 PM EDT Fri Jul 10 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...
1) Showers and storms move in from the north late this afternoon
into the evening, primarily near and north of I-70.

2) A boundary will sag south across the region Saturday into Saturday
evening as low pressure tracks along it. This will result in more
showers and storms, with locally heavy rainfall possible that could
lead to flooding.

3) Drier and warmer conditions for next week.

&&

.DISCUSSION...
KEY MESSAGE 1)

A east-west oriented boundary will be sag slowly south through the
afternoon and continue overnight. In the moderately unstable airmass
showers and storms will continue to develop near this boundary with
areas along and north of I-70 having the highest probability of
being affected.

There is potential for locally heavy rainfall due to the moist
environment with PWATs 1.6 to 1.8 inches. Also, slow movement with
backbuilding may lead to training storms. Expect some of this
convective activity to push south into the overnight hours and
diminish. In addition, there is a signal in some of the solutions for
a weakening MCS to move into the area from the west late tonight
with the potential for heavy rain impacts greatest across Eastern
Indiana, Southwest Ohio and North Central KY thru sunrise Saturday.


KEY MESSAGE 2)

Mid level shortwave to drop south with flow becoming northerly
Saturday night. Slow moving east-west boundary across Southern Ohio
will continue to sag slowly south through the day. Most model
solutions continue to show this front pushing south of the area by
Saturday evening. Showers and thunderstorms will increase in coverage
and intensity with diurnal heating and the approach of a short wave
and surface low. PWATs will be 1.8 to 2.0 inches and the warm cloud
depth will still be favorable for efficient rainfall rates that can
lead to locally heavy rainfall. This heavy rain and flood threat will
likely linger into Saturday evening along and south of the Ohio
River.

KEY MESSAGE 3)
A large mid level ridge centered over the northern Plains will
extend eastward into the region for the early to mid part of next
week. This will bring generally drier conditions and warmer
temperatures. Highs will push into the upper 80s to lower 90s.
Wednesday may be the warmest day with a few locations topping out in
the mid 90s. Some uncertainty exists regarding thunderstorm chances
with the ECMWF supporting drier conditions and warmer temperatures
Wednesday and the GFS slightly tempering highs and leaning toward a
chance for thunderstorms.

&&

.AVIATION /00Z SATURDAY THROUGH WEDNESDAY/...
Weakening complex of storms remains near and south of I-70 this
evening, which are in close proximity to the slow moving boundary.
Cannot rule out our northern terminals still observing a passing
shower and perhaps isolated storm overnight in this air mass, but
coverage will be isolated at best.

Another MCS is expected to develop to our west tonight and push into
southern OH during the early morning hours Saturday. This system is
not likely to bring a severe component, but some storms may still be
embedded as it moves through our southern terminals (primarily
KCVG/KLUK).

Scattered showers/storms expected to develop yet again on Saturday as
the southerly progression of the boundary has slowed. Thus, have at
least a PROB30 mention for all terminals given the expected diurnal
enhancement of convective activity.

VFR is favored majority of the period outside of thunderstorms, but
some MVFR CIGs may sneak in early Saturday, especially around
southern OH. A wind shift is expected with the passage of the
boundary, with a prevailing NNE wind developing on Saturday.

OUTLOOK...MVFR ceilings and visibilities possible into Saturday
night.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...Flood Watch through late Saturday night for OHZ073-074-078>082-088.
KY...Flood Watch through late Saturday night for KYZ089>100.
IN...Flood Watch through late Saturday night for INZ075-080.

&&

$$

DISCUSSION...AR
AVIATION...Clark

NWS ILN Office Area Forecast Discussion