699
FXUS63 KIND 281010
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
610 AM EDT Fri Aug 28 2026

.KEY MESSAGES...

- Dry Today and Saturday with seasonable temperatures.

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

&&

.DISCUSSION (Today through Thursday)...
Issued at 231 AM EDT Fri Aug 28 2026

Surface analysis early this morning shows strong high pressure in
place over the Great Lakes spilling SW across IL to MO. This was
providing light, NE surface flow across Indiana. GOES19 shows a few
clouds over the southern parts of the forecast area, but most areas
were observing clear skies. Dew points across the area were in the
upper 50s and lower 60s. Aloft, strong ridging was in place over the
Rockies while a deep low over Hudson Bay placed troughing through
the Great Lakes and Ohio valley. Water Vapor shows strong subsidence
in place over Indiana and the region.

Today and Tonight...

Models today continue to show NW flow in place across Indiana, with
little in the way of forcing passing. Strong mid level drying and
subsidence is shown to be dominate today and tonight. Forecast
soundings show a dry column today, with a mid level inversion. This
should result in a few late afternoon CU with limited vertical
growth. Ultimately, partly cloudy skies. Highs will once again reach
the lower 80s, near persistence, and dew points near 60 will seem
somewhat comfortable.

Diurnal CU will dissipate this evening, leading to clear skies and
lows in the lower 60s.

Saturday and Sunday...

Dry weather with a warming trend is expected through the weekend.
The ridging over the western CONUS is expected to flatten somewhat
and shift east to the Great Lakes through the weekend. This will
begin the set-up for the arriving heat for next week. The flow will
steer any forcing well north to Ontario and the Great Lakes.
Forecast soundings suggest mid level subsidence remaining in place
on Saturday, however some mid and high level moisture is suggested
to arrive on Sunday. Very dry lower levels at that time will just
result in an increase in cloud cover on Sunday as compared to
Saturday. Within the lower levels, the strong high pressure system
will shift to the northeastern states on Saturday, before moving off
the east coast on Sunday. This will allow the beginning of return
flow, warm and humid southerly winds by Sunday and a gradual
increase in temperatures amid warm air advection. Looks for highs in
the mid 80s on Saturday and the upper 80s by Sunday.

Monday through Thursday...

The forecast for next week continues to be consistent. Consistently
hot.

Models have continued with the idea of strong upper level high
pressure in place across the south, steering all forcing dynamics
well north of Indiana, and keeping Indiana protected from any upper
waves. The result beneath this upper ridge will be a very strong
Bermuda high pressure systems, allowing hot and humid SW gulf flow
into the Ohio valley and Central Indiana all week. This results in a
thermal ridge of high pressure in place stretching from KS across IA
to the southern Great Lakes. That area will be the main focus for
any showers and storms that may occur. Forecast soundings over
Indiana continue to suggest a very hot and dry column through the
week, with convective temperatures in excess of 100. Thus confidence
for any afternoon diurnal storms is low. Look for humid weather,
above normal temperatures, mostly sunny days and mostly clear nights.

&&

.AVIATION (12Z TAF Issuance)...
Issued at 609 AM EDT Fri Aug 28 2026

Impacts:

- Mainly VFR Conditions this TAF period.

Discussion:

Little change from the previous forecast. Some mid level cloud over
Central Indiana has prevented fog formation at most of the TAF
sites. Any patchy fog will quickly burn off after sunrise.

High pressure will continue to build into the area today. Forecast
soundings suggest some CU will be possible during the afternoon.
Clouds will be lost toward sunset as VFR conditions continue.

&&

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

$$

AVIATION...Puma
DISCUSSION...Puma