112
FXUS63 KIND 301401
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
1001 AM EDT Sat May 30 2026

.KEY MESSAGES...

- Dry and pleasant weather expected today through the middle of next
week.

- Near-average temperatures through the weekend into next week.

- The next best chance for rain is next Saturday.

&&

.FORECAST UPDATE...
Issued at 1001 AM EDT Sat May 30 2026

Forecast is in great shape and no changes were needed for this
morning`s update. A blocking pattern aloft and surface high pressure
centered over Ontario will keep warm and dry conditions across
Indiana for the next week. Latest ACARs sounding shows a very dry
airmass in place with the exception of a few high clouds above 20
kft. E/NE winds in the lower levels will keep the dry airmass in
place while maintaining near normal temperatures as the core of the
heat is confined to the southern plains. Mixing should commence
shortly as local soundings show steep low level lapse rates under as
weak subsidence inversion at 1.5 km agl. Winds are fairly light
through the column, so any gusts mixing to the surface should remain
under 15 mph. Expect a drop in humidity this afternoon as drier air
mixes down, with dew points falling to the upper 40s in some
locations!

&&

.DISCUSSION (Today through Friday)...
Issued at 229 AM EDT Sat May 30 2026

Surface analysis early this morning shows high pressure over
Ontario, sagging southward across the Great Lakes into NE Indiana
and Ohio. Cool easterly surface flow was in place across Indiana.
GOES16 shows plentiful high cloud across Indiana, flowing southeast
across the state. Water Vapor shows a strong ridge across in place
through the Mississippi Valley into Central Canada. This was a
highly amplified Omega block, with associated lows over UT and New
England. Dew points today were in the comfortable 50s.

Today and Tonight...

The strong Omega Block will be the main weather feature for the next
several days. Today and tonight, the strong ridging will remain west
of Indiana, allowing lee side flow and subsidence to remain over the
eastern Great Lakes. This will result in strong high pressure
development across the Great Lakes along with continued dry and mild
easterly surface flow across central Indiana. Forecast soundings
today and tonight show a dry column, with an inversion in place aloft
inhibiting CU development. Upper levels suggest passing high cloud
from time to time, hinting at passing CI. Thus a mostly sunny day
and mostly clear night will be expected today with highs in mainly
in the lower 80s.

Sunday through Monday Night...

Little overall change is expected within the pattern during this
time period. The strong, highly amplified Omega block is expected to
remain in place as typical for these systems. Of note, the strong
surface high pressure systems developing over the eastern Great
lakes will push a backdoor surface cool front across Indiana on
Sunday, allowing for some cold air advection on Sunday and Monday.
This will result in highs and lows slightly cooler than persistence
on these days. Otherwise, look for continued pleasant weather with
mostly clear skies.

Tuesday through Friday...

Dry and seasonable weather is expected for Tuesday through Friday.
This is due to a large Omega block ridge that is expected to set up
over much of the midwest, stretching from TX to Ontario. The upper
flow will send any forcing dynamics well north of Indiana during
this time, while the flow on the lee side of the ridge, over the
eastern Great Lakes results in subsidence. This will allow the
development of a strong area of dry and mild surface high pressure
to set up over the eastern Great Lakes, providing easterly surface
winds to Indiana.

Forecast soundings through the period show a very dry column with no
chances for CU development. A few high clouds will be possible
within the flow aloft, but overall we should expect mostly sunny
days and mostly clear nights.

The mainly dry and easterly surface flow will result in near normal
temperatures, with daily highs in the lower 80s.

The next best chance for rain looks to be next Saturday, as the
ridge breaks down and a cold front sags into the area.

&&

.AVIATION (12Z TAF Issuance)...
Issued at 616 AM EDT Sat May 30 2026

Impacts:

- None; VFR Conditions are expected.

Discussion:

No significant changes to the ongoing forecast.

Ridging aloft and surface high pressure over the Great Lakes will
keep VFR conditions through the period. GOES16 shows numerous high
CI across the area, but this will be non-impactful, resulting in
high cigs.

Forecast soundings across the area continue to show a dry column
through the TAF period along with subsidence and just some passing
high clouds from time to time.


&&

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

$$

UPDATE...CM
AVIATION...Puma
DISCUSSION...Puma