253
FXUS63 KIND 220650
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
250 AM EDT Fri Aug 22 2025

.KEY MESSAGES...

- Temperatures near to below normal throughout the next week with
  little to no chance for rain until the end of the month

&&

.SHORT TERM (Today and tonight)...
Issued at 250 AM EDT Fri Aug 22 2025

Relatively cool weather persists over Central Indiana as NW flow
remains the dominate pattern. Clouds have largely broken up although
a low deck is slowly drifting SW early this morning.

Through sunrise, a chance for fog exists as the center of high
pressure settles in over the region with clearing skies and lighter
winds. Best chance for any fog formation will be for HUF and LAF
where skies have already cleared in low lying, wind sheltered areas.
Any fog should dissipate within the 8-9am timeframe. Dew points and
boundary layer RH are still relatively high, so do not expect a
large diurnal range in temperatures with lows near 60.

Another comfortable August day in the forecast for today as high
pressure remains the dominant weather influence locally. Cloud cover
should be more scattered in nature resulting in more sunshine and
better boundary layer heating than the past few days. A strong low
level subsidence inversion will hold steady overhead, limiting
deeper mixing during peak heating of the day, but with more sunshine
highs should be able to reach the 80 degree mark for most areas.

Persistence is an excellent forecast for tonight. Similar to
Thursday night, calm NE winds are expected with another chance of
fog being possible. There is suggestion of slightly more cloud
coverage but not enough to rule out the possibility of fog. Lows
will again be in the low 60s.

&&

.LONG TERM (Saturday through Thursday)...
Issued at 250 AM EDT Fri Aug 22 2025

A significant and welcome change remains the expectation from Sunday
onward, as a reinforcing shot of cooler, drier air arrives in the
region, bringing further relief from what has largely been a warm
and very humid summer across central Indiana.

A moisture depleted cold front arrives in the region late Saturday
into Saturday evening, bringing a reinforcing shot of cooler air as
a large upper low drops into the Great Lakes. Most guidance is dry
with this feature for the most part, though slight chance PoPs will
be carried for mainly northern portions of the area for a stray
shower Saturday afternoon.

It wouldn`t be shocking to see some lake effect sprinkles or showers
make their way into some portion of central Indiana later in the
weekend as well, though low to mid level flow in guidance is not
well-aligned at the time to promote lengthy lake effect plumes. The
more noticeable impact may be to increase low level cloud cover
across portions of central Indiana.

In the wake of this second boundary, a refreshing change is expected
late in the weekend into next week, with highs in the 70s to near
80, lows in the upper 40s to mid 50s, and dewpoints much lower in
the mid 40s to mid 50s, making for a very pleasant final week of
climatological summer. The cooler and more comfortable conditions
appear likely to persist beyond the 7 day period into the Labor Day
weekend, as larger scale troughing continues to dominate over much
of the central and eastern CONUS.

&&

.AVIATION (06Z TAF Issuance)...
Issued at 206 AM EDT Fri Aug 22 2025

Impacts:

-Patchy fog towards daybreak will bring periodic MVFR to IFR vsbys.

Discussion:

Cloud coverage will gradually decrease through the night with a
return of patchy fog expected after 09Z through around 14Z.
Confidence is highest at LAF and HUF with lower chances at IND and
BMG. There could be a brief IFR ceiling during the fog, but
expectations are that the fog will be very shallow and shouldn`t
impact cigs. Clouds will then lift to around 025-035 and remain
scattered through the rest of the day. Winds will remain
northeasterly at 4-10kts through the TAF period. There is another
chance of fog early tomorrow morning.


&&

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

$$

SHORT TERM...KF/CM
LONG TERM...Nield
AVIATION...KF