Lafayette, Indiana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

501
FXUS63 KIND 060637
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
237 AM EDT Mon Jul 6 2026

.KEY MESSAGES...

- Isolated to scattered storms today, highest coverage across
  eastern Indiana

- Slow moving storms may produce pockets of flooding

- Generally dry Tuesday and Wednesday, better chances for showers
  and storms Thursday into the weekend

&&

.DISCUSSION (Today through Sunday)...
Issued at 235 AM EDT Mon Jul 6 2026

Overview.

Isolated to scattered showers and storms today with rain chances
tomorrow and Wednesday generally limited to southern Indiana. A cold
front will approach the region on Thursday and is forecast to become
quasi-stationary across the Ohio Valley, resulting in daily chances
for showers and thunderstorms through the weekend.

Rest of Tonight Through Tuesday.

Patchy fog along with low stratus is expected to form over the next
few hours, but with the lower than forecast rain coverage today, the
low levels aren`t quite as moist which should keep fog coverage
lower than yesterday.

The weak surface low that has been a catalyst for the rain/storms
recently will slowly move to the east towards the East Coast today
with lingering chances for showers and storms through the day today,
mainly focused across eastern Indiana. Morning low stratus and a
shallow inversion will initially limit insolation and delay daytime
destabilization. Following diurnal clearing by midday, MLCAPE is
forecast to increase into the 500-1000 J/kg range. Convective
initiation is expected to maximize during peak heating between 19Z
and 02Z. Weak kinematic fields, with 0-6 km bulk shear under 15
knots, will limit storm organization and result in slow cell motion.
Heavy rainfall and localized minor flooding represent the primary
hazards, though isolated sub-severe wind gusts remain possible via
localized precipitation loading. Storms will also exhibit a more
unusual storm motion, generally out of the northeast.

The system will exit east of the region Monday night, allowing weak
surface high pressure and drier air to advect into central Indiana
from the north. Rising mid-level heights and associated subsidence
will suppress convective potential across the majority of the
forecast area on Tuesday. Isolated afternoon convection will be
restricted to the far southern counties in closer proximity to the
retreating moisture plume. High temperatures will remain near
seasonal normals in the mid to upper 80s.

Wednesday Through Sunday.

Mid-level ridging over the region on Wednesday will begin to
suppress southward as heights aloft fall to the north and a weak
upper-level low tracks through the lower Ohio Valley. Lingering dry
air and large-scale subsidence will limit afternoon convective
coverage, keeping the probability of isolated thunderstorms confined
to the southern forecast area boundary.

A pattern transition occurs Thursday through Sunday as a northern
stream shortwave trough digs into the Great Lakes, driving a surface
cold front southward. Guidance indicates this boundary will become
quasi-stationary across the region late in the week as it encounters
a flat sub-tropical ridge over the Gulf Coast states. Within this
weak steering regime, successive low-amplitude mid-level shortwaves
will track along the frontal zone, interacting with a replenished
moisture reservoir featuring PWAT values near 2.00 inches.

This environment will favor the daily convective clusters and
multi-cell arrays from Thursday through Sunday. Given weak deep-
layer wind shear, organized severe weather is not anticipated,
though localized downburst wind gusts remain possible with the
strongest updrafts. High precipitation efficiency and potential
training of cells will make localized heavy rainfall the primary
operational impact. High temperatures will generally hover in the
mid-80s through Friday with fairly similar conditions into the
weekend as the previously forecast relief from the higher
dewpoints looks less likely as the drier Canadian air remains
locked to the north.

&&

.AVIATION (06Z TAF Issuance)...
Issued at 1255 AM EDT Mon Jul 6 2026

Impacts:

- Potential for additional MVFR to IFR cigs/vsbys to move in after
  08-09Z this morning

- Isolated to scattered showers possible after 20Z today

Discussion:

Cyclonic flow associated with a weak low pressure system along with
lingering lower level moisture will once again allow for MVFR/IFR
cigs to form after 08Z with fog. Clouds and fog will mix out during
the day with isolated to scattered showers then possible after 20Z.
These showers should diminish after sunset due to the loss of
daytime heating. Expect winds to generally remain out of the north
today at less than 10kt.


&&

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

$$

AVIATION...Melo
DISCUSSION...White