376
FXUS63 KIND 291041
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
641 AM EDT Fri Aug 29 2025

.KEY MESSAGES...

- Dry and quiet weather for the weekend into early next week

- Next chance for rain arrives Wednesday and Thursday with another
  shot of cooler air behind the front

&&

.SHORT TERM (Today and tonight)...
Issued at 247 AM EDT Fri Aug 29 2025

Surface analysis shows a cold front pushing southward across Indiana
as of 2am. The front, currently located across far southern portions
of the state, has largely cleared our CWA leaving us with a light
northeasterly breeze and a few scattered clouds. Temperatures
continue to slowly drop as cooler air streams in from the northeast.
The coolest air has lagged behind the surface front with the most
noticeable drop occurring over northern portions of the area.
Readings here are already into the low to mid 50s. Further south,
most places remain in the low 60s as of 2am.

Going forward, continued cooling is expected as the front drops
southward. Some patchy fog is possible by morning, especially in
wind-sheltered areas, near rivers, and in rural/agricultural
locations. Morning low temperatures in the 50s are expected with a
few upper 40s possible across our north.

Any fog will dissipate after sunrise. Surface high pressure is
expected to build in during the day today leaving us with quiet
weather. Despite this, the day is not expected to be entirely clear.
High clouds are streaming in from the northwest downstream of a
large ridge located over the Rocky Mountains. These clouds may be
present for much of the day becoming SCT to BKN at times. Enough
sunshine should filter through to allow for high temps in the low to
mid 70s, with a few 80 degree readings possible across our southern
counties.

Tonight will feature cooler temps as surface high pressure takes
hold. Given ideal radiational cooling potential, more widespread
temperature readings in the mid to upper 40s are anticipated. A few
places may come within a few degrees of their record lows by
Saturday morning. Some lingering clouds may limit cooling across our
far northwestern counties. However, mostly clear skies are expected
over the majority of our area tonight. Light winds and clear skies
should allow fog to once again form in favored locations. Fog may
not be as widespread due to slightly drier air compared to recent
nights.

&&

.LONG TERM (Saturday through Thursday)...
Issued at 247 AM EDT Fri Aug 29 2025

Saturday through Sunday...

Models suggest northerly flow aloft will be in place this weekend
and cyclonic troughing aloft remains in place over New England as a
strong ridge of high pressure is found over Central Canada. This
will place Indiana within an area favorable for subsidence.
Meanwhile at the surface, strong high pressure is set up to take
shape over the central Great Lakes. This high will set up a dry and
cool easterly lower level flow. Forecast soundings appear to remain
dry at those times, thus mostly sunny days and mostly sunny nights,
with near normal temperatures and low humidity are expected.

Monday and Tuesday...

The weather pattern aloft will change by early next week although
the end result in the weather will be nil. At this time a weak but
broad upper low is expected to settle over the middle Atlantic
States. An upper ridge is expected to be found across the Great
Lakes, pushing across Ontario and Quebec. Again, this pattern will
be favorable for subsidence across Central Indiana as little in the
way of forcing dynamics push across our state. At the surface during
this time, strong high pressure remains in place over the
northeastern states, expanding its influence westward across Indiana
to the upper midwest. Again, this will result in dry and cooler
easterly lower level flow, resulting in partly cloudy days and
mostly clear nights.

Wednesday and Thursday -

Chances for rain and perhaps some thunderstorms will return on
Wednesday and Thursday. Within the upper pattern, a deep trough is
expected to remain over the eastern United States while a wave of
upper forcing within the cyclonic flow along with an upper trough is
suggested to pass across Indiana. A second area and stronger area of
upper forcing is expected to push into the Great Lakes and Indiana
on Thursday. Within the lower levels, the Wednesday into Thursday
system appears to be accompanied by a strong cold front. Thus given
these signals, chances for showers and or storms appear to be
prudent at this juncture. Highs on Wednesday and Thursday will
remain in the 70s.

&&

.AVIATION (12Z TAF Issuance)...
Issued at 641 AM EDT Fri Aug 29 2025

Impacts:

- Patchy fog possible tonight into early Saturday.

Discussion:

VFR conditions expected through the TAF period.

A cold front passed through central Indiana early last night and
winds have become northeasterly behind it. Light north to
northeasterly flow is expected to continue through the TAF period.

Some low clouds are pushing southwestward out of Ohio this morning,
with Fort Wayne reporting a BKN layer at around 1000ft agl. Guidance
tends to dissipate these clouds before reaching LAF or IND. We will
include a FEW015 group at these locations just in case...as
sometimes guidance can be too optimistic with low cloud cover in
post-frontal environments.

High cirrus is expected to pass through central Indiana today,
becoming BKN at times during the afternoon. Some low to mid-level
clouds may be present at times overnight into Saturday as well. The
best chance of lingering cloud cover tonight will be at LAF and HUF.

Fog chances tonight will be a bit lower than today owing to drier
air and lingering cloud cover. But some shallow fog is still
possible at typically fog-prone terminals.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...Eckhoff
LONG TERM...Puma
AVIATION...Eckhoff