Lafayette, Indiana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

950
FXUS63 KIND 141841
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
241 PM EDT Tue Jul 14 2026

.KEY MESSAGES...

- Generally dry weather and a steady warming trend mid to late week

- Peak heat indices around to slightly above 100 degrees each
  afternoon mid-late week

- Chances for showers and storms return Friday through the weekend,
  primarily during the afternoon and evening

&&

.DISCUSSION (This evening through Tuesday)...
Issued at 239 PM EDT Tue Jul 14 2026

Much of the upper level pattern over the next 7 days will be
dominated by a broad ridge across the CONUS. This ridge will remain
persistent as a Rex Block forms today and tomorrow, keeping the
ridge axis locked over the central US. In return, generally warmer
than normal conditions are expected across the central and eastern
US with subtle surface condition changes depending on low level
features.

For today and tomorrow, central Indiana will be situated on the
periphery of a weak cutoff low to the south and a closed high to the
north. This will place a very weak confluence boundary just to our
south and mainly subsidence along and north of the I-70 corridor. In
return, slightly warmer temperatures are expected closer to the
surface high pressure, and thus heat index values will likely near
and potentially exceed 100 for both Wednesday and Thursday.
Within this high pressure, stagnant air will also lead to greater
ozone in the PBL, and therefor lower air quality.

As we approach the weekend, the surface high to the north will begin
to break down, allowing for weak mid level moisture return. This
will lead to destabilization each afternoon Friday through Sunday
with diurnal showers and thunderstorms likely. Friday will likely
have the greatest coverage of thunderstorms as a shortwave will
induce a narrow, weak LLJ. A few organized clusters may form out of
this weak LLJ on Friday with a low risk for damaging wind gusts, but
otherwise severe weather is not expected over the weekend.

&&

.AVIATION (18Z TAF Issuance)...
Issued at 121 PM EDT Tue Jul 14 2026

Impacts:

- BCFG with 3SM VIS at KLAF between 09-12Z

Discussion:

VFR conditions are expected through the period except for a brief
period of BCFG at KLAF tomorrow morning.

A smoke layer is likely to linger aloft today and tonight,
highlighted by the FEW250 group. Winds will be somewhat variable at
KIND and KLAF today through tonight, with KLAF become calm early
tomorrow morning. At the southern sites, winds will remain easterly,
transitioning to variable tomorrow.


&&

.IND WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from noon to 8 PM EDT Wednesday for INZ021-029>031-
036>042-046>049.

&&

$$

AVIATION...Updike
DISCUSSION...Updike