942
FXUS63 KIND 140937
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
537 AM EDT Thu May 14 2026

.KEY MESSAGES...

- Dry and seasonable through Thursday night

- Rain chances return early Friday with additional chances for
  showers and storms next week

- Much warmer this weekend into early next week with highs in the
  upper 80s to near 90F

&&

.DISCUSSION (Today through Wednesday)...
Issued at 133 AM EDT Thu May 14 2026

Overview.

Dry and seasonable conditions will dominate central Indiana through
Thursday night as high pressure slowly tracks across the region.
However, a major synoptic pattern shift is on the horizon heading
into the weekend and next week. An unseasonably strong warming trend
will develop as an upper-level ridge of high pressure builds over
the eastern half of the nation. This will lift a quasi-stationary
warm front into the area, shifting the region from a cool and dry
regime into a hot, humid, and unstable environment. The primary
forecast hazards over the next week will transition from chilly
overnight temperatures early Thursday to daily thunderstorm chances
with a low-end threat for severe weather and the arrival of early
summer heat.

Thursday through Friday.

Surface high pressure centered over the northern Plains will slide
directly over the Ohio Valley on Thursday, leading to a beautiful
and quiet day with mostly sunny skies. Despite the ample sunshine,
cooler air lingering behind the recent frontal passage will suppress
temperatures, keeping afternoon highs in the mid-60s, which is
slightly below normal for the middle of May. Clear skies and light
winds Thursday night will maximize radiational cooling, dropping
overnight lows into the low to mid 40s across central Indiana. A
decaying convective cluster may reach western Indiana towards
daybreak Friday, but confidence is low at this time.

By Friday, the high pressure system will slide eastward toward the
Appalachian Mountains, shifting surface winds to a southerly
direction. This wind shift will kick off a robust warm air advection
regime, bringing Friday afternoon highs back into the lower 70s.
As moisture begins to stream northward from the Gulf, an
approaching warm front from the southwest will introduce the first
in a series of daily precipitation opportunities as early as late
Thursday night, with scattered showers and isolated thunderstorms
continuing into early Friday, mainly across the western half of
the forecast area.

Saturday through Wednesday.

A multi-day active weather period takes hold this weekend and
persists well into next week as central Indiana finds itself deeply
embedded within a warm tropical airmass. The quasi-stationary warm
front is projected to stall near the Great Lakes, placing the local
area firmly within the warm sector of the developing storm system.
Global deterministic models and ensemble guidance suggest that a
sequence of weak upper-level atmospheric disturbances will ripple
along this boundary. While specific timing for individual waves
remains difficult to pin down this far in advance, this volatile
thermodynamic setup will yield daily probabilities for showers and
thunderstorms from Saturday through next Wednesday.

The combination of surging surface dew points into the 60s and
intense daytime heating will generate sufficient CAPE for daily
diurnally driven thunderstorms. Any thunderstorm that develops
during the afternoon and evening hours will have a reservoir of
energy to tap into, maintaining a low-end threat for severe weather,
including strong downburst winds and hail.

Aside from the daily storm potential, the main story will be the
near record heat. High temperatures are forecast to soar into the
mid to upper 80s over the weekend and could reach the lower 90s
by Monday or Tuesday. If these temperatures materialize, it would
mark the first 90 degree day of the year for the region. A more
potent upper-level trough and associated surface cold front are
modeled to cross the area towards Tuesday night or Wednesday,
which could eventually bring a more organized round of
thunderstorms and a return to cooler, more seasonable weather by
the end of the period.

&&

.AVIATION (12Z TAF Issuance)...
Issued at 536 AM EDT Thu May 14 2026

Impacts:

- None.

Discussion:

VFR conditions expected through the TAF period with mostly clear
skies and light northerly winds of 6-10 kts through the late
overnight hours. There is a low-end threat for rain towards daybreak
Friday with higher confidence in a VFR stratus deck.

&&

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

$$

AVIATION...White
DISCUSSION...White