040
FXUS63 KIND 031938
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
338 PM EDT Sun May 3 2026

.KEY MESSAGES...

- Increasing clouds today with afternoon rain chances across the
  north. Warmer.

- Milder but still largely below normal for the upcoming week, with
  multiple chances for rain; heavy rain possible at times.

- Marginal threat for damaging winds and large hail late Monday.

&&

.DISCUSSION (This evening through Sunday)...
Issued at 336 PM EDT Sun May 3 2026

Rain is ongoing across our north with SW flow bringing gusts of 25-
30 mph and gradually warming temps. A larger upper trough will
continue approaching the area with the associated cold front nearing
late in the day tomorrow. PoPs will increase as the front nears and
lift and moisture increase, with best chances tomorrow night and
through the day Tuesday. There is some concern for isolated to
scattered severe weather tomorrow evening into the early morning
hours Tuesday despite limited moisture and only modest shear and
buoyancy. However, large scale forcing may increase enough during
that time frame to produce damaging winds and large hail. Luckily
as we get towards daybreak Tuesday, that threat will diminish
with rain and thunderstorms taking over. More widespread rainfall
will increase as Tuesday goes on and into the overnight. The
front, and with it the rain, should exit to the SE by Wednesday.
Flooding could be a concern on the back end of this system,
especially along rivers. Through Tuesday morning half an inch to
an inch is expected, but an additional inch or more is not out of
the realm of possibility for late Tuesday into the overnight
hours.

Latest guidance is advancing the additional forcing Tuesday night
quickly eastward, with QPF on Wednesday trending downward.
Temperatures for Wednesday will be cooler with deep cloud cover and
consistent troughing aloft; expect highs in the upper 50s to low
60s. Frosty conditions once again cannot be ruled out for Wednesday
night with 850mb temperatures hovering just below freezing. That
said, this will greatly depend on if clearing will occur as surface
pressure increases.

To end the week, there will be a slight pattern change as the
Bermuda high slides westward and the deep troughing over the eastern-
half of Canada begins to flatten out. This will likely lead to more
a more consistent pattern of near seasonal temperatures with brief
periodic rain chances along quickly passing shortwaves. Timing of
these waves is still widely varied amongst ensemble members.

As we head into the middle of the month, teleconnection patterns are
hinting at a weakening of the NAO of which should aid in progression
of the troughing to the north and a return to SW flow, resulting in
a stretch of warmer than normal conditions.

&&

.AVIATION (18Z TAF Issuance)...
Issued at 216 PM EDT Sun May 3 2026

Impacts:

- Gusty winds during the afternoons, up to 25 kts

Discussion:

Light rain is ongoing across the north and may reach down to IND but
confidence on occurrence was not enough to include in the TAF.
Cloud coverage is expected to expand tonight with S/SW winds
diminishing some overnight. Rain chances will then shift to the
southern sites for tonight, but again mainly light rain expected.
Tomorrow, winds will again gust during the afternoon to around 25
kt.


&&

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

$$

AVIATION...KF
DISCUSSION...KF/Updike