741
FXUS63 KIND 272311
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
711 PM EDT Thu Aug 27 2026

.KEY MESSAGES...

- Dry Friday and Saturday with seasonable temperatures

- Hotter and more humid air arrives Sunday and persists into
  mid-week next week

&&

.DISCUSSION (This evening through Thursday)...
Issued at 210 PM EDT Thu Aug 27 2026

Rest of This Afternoon...

A surface trough was near I-70 early this afternoon. Radar shows
isolated showers developing, from just east of central Indiana into
Ohio. Scattered to broken cumulus covered central Indiana.

With the boundary in the area and some instability, isolated showers
remain possible. Will continue to monitor in case coverage becomes
enough to mention them in the forecast.

Tonight,,,

The isolated showers may linger until early evening, but again
coverage will likely be too low to mention. Otherwise, the cumulus
will gradually dissipate, leaving mostly clear to clear skies. The
partial lunar eclipse should be visible (greatest eclipse is at 1213
AM EDT).

Light winds along with the mostly clear skies will set the stage for
some patchy fog again tonight. With some drying occurring today,
there won`t be as much dense fog around though. These conditions
will allow temperatures to get below blended guidance, so lowered
min temperatures a bit.

Friday and Saturday...

High pressure will provide dry conditions. Highs will be in the
lower to middle 80s with lows in the upper 50s Friday night.

Saturday night through Tuesday...

An upper level high will push its way into the area during this
period, bringing a return of hot and humid conditions.

Before the warmer air arrives, convection will try and ride around
the upper high Saturday night. For now believe these will dissipate
before reaching central Indiana, but some debris clouds from these
may linger into Sunday.

Highs will warm from the upper 80s/lower 90s Sunday to the lower and
middle 90s by Tuesday. Southwest winds will bring dewpoints
potentially back to near 70 by Tuesday. Heat indices near 100 may
occur most areas by Tuesday.

Wednesday and beyond...

The upper high will still be the predominant influence mid-week next
week, but it may shift just far enough away to allow for rain
chances to return. Will have some low PoPs but with low confidence.

Heat will continue, with highs mainly in the 90s again on Wednesday.
If the upper high moves far enough away, temperatures may cool into
the upper 80s to lower 90s on Thursday.

The persistent heat may lead to the need for a Heat Advisory, even
if heat indices don`t meet criteria.

&&

.AVIATION (00Z TAF Issuance)...
Issued at 711 PM EDT Thu Aug 27 2026

Impacts:

- MVFR/TEMPO IFR fog possible at the outlying sites overnight.

Discussion:

High pressure building into the area over still wet ground from
plentiful recent rains should set the stage for another night of fog
in the outlying areas, including the 3 outlying TAF sites.

Guidance is struggling to capture this potential, so uncertainty is
higher than would be preferred, but will take the 3 outlying sites
to 3SM/TEMPO 2SM around 08Z, with fog dissipating in typical diurnal
fashion after daybreak.

Winds will be northerly to light and variable this evening, becoming
calm at most sites eventually, before becoming northeasterly at 5-
8KT on Friday. A few fair weather cumulus based around 5kft can be
expected tomorrow.

&&

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

$$

AVIATION...Nield
DISCUSSION...50