Lafayette, Indiana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

835
FXUS63 KIND 150202
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
1002 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

&&

.FORECAST UPDATE...
Issued at 1002 PM EDT Tue Jul 14 2026

Quiet weather continues across central Indiana this evening with
high pressure in control. Forecast is in good shape this evening.

Based on visible satellite pictures from near sunset, upped sky
cover a bit north due to elevated smoke from Canadian wildfires.
Used HRRR vertically integrated smoke forecasts to keep that sky
cover going through the night.

Tweaked low temperatures down some in rural areas and adjusted
hourly temperature forecasts based on latest trends.

&&

.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 (00Z TAF Issuance)...
Issued at 655 PM EDT Tue Jul 14 2026

Impacts:

- Variable visibility potentially to IFR/worse at KLAF 07-12Z

Discussion:

Outside of overnight/early morning fog potential, VFR conditions are
expected.

With similar conditions to last night, expect fog to develop at KLAF
after 06Z. Visibility will likely vary significantly at times, so
will go with MVFR with BCFG mention. Cannot rule out fog at
KHUF/KBMG, but feel odds are too low to mention.

Elevated smoke will be across the area, thickest north. Otherwise
some cumulus will pop up again Wednesday. Winds will remain less than
10kt and will vary in direction.


&&

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

&&

$$

UPDATE...50
AVIATION...50
DISCUSSION...Updike