Lafayette, Indiana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

906
FXUS63 KIND 201927
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
327 PM EDT Mon Apr 20 2026

.KEY MESSAGES...

- Warming trend begins on Tuesday, with above normal temperatures
  continuing into the weekend

- Rain chances Tuesday night into Wednesday and again Friday into
  the weekend

&&

.DISCUSSION (This evening through Monday)...
Issued at 326 PM EDT Mon Apr 20 2026

High pressure today is providing central Indiana with predominately
clear skies aside from some passing occasional cirrus. As the high
pushes eastward, some cumulus clouds may form later in the day.
The clear skies and shift to more southerly winds through the day
will help aid highs in the mid 50s to low 60s today. Increased
winds will set up aloft from tonight through the day tomorrow due
to increased pressure gradients forming between the exiting high
and an approaching surface low. Wind gusts of 20-30 mph are
expected to mix down tomorrow, with highest gusts in the
afternoon.

The approaching surface low pressure system could bring rain and
thunderstorm chances for Tuesday late evening into the day
Wednesday. Best PoPs will be across the north, where a larger
systems boundary will be draped across. Less than a quarter inch of
rain is likely with this system as there won`t be much moisture to
work with. Behind it, a combination of upper ridging and surface
high over the Tennessee Valley will prompt dry weather from late
Wednesday to late Thursday at least.

There will be a few days of potential fire concern this week due
largely to low relative humidities. Today will see min RH of 25-30%
but luckily winds are light today. Tuesday could see min RH values
near 30% with higher gusts ongoing as previously mentioned. Thursday
will see values near 40% and is also expected to see gusts of around
25 mph. Be cautious if working with any open flames.

Deep upper troughing across western portions of the United States
will eject multiple impulses towards the region late this week
through early next week. The greatest precipitation chances are
still on Friday when a low pressure system and associated cold front
push into the area. Severe weather is not expected at this time due
to limited instability and deep layer wind shear, but a few strong
storms cannot be ruled out. Rain chances range from 50 to 80
percent.

For Friday and beyond, the cold front is expected to stall near
central Indiana by Saturday morning keeping low chances for rain or
storms in the forecast through the weekend. The primary forcing by
the weekend would likely be driven by mesoscale factors or wherever
the diffuse front ends up so confidence is low. Slightly higher rain
chances return towards early next week when long range guidance
suggest another developing low pressure system could move towards
the region. Specific details remain highly uncertain as there is a
large spread in model solutions. Temperatures are expected to remain
slightly above normal during the period.

&&

.AVIATION (18Z TAF Issuance)...
Issued at 209 PM EDT Mon Apr 20 2026

Impacts:

- Wind gusts up to 25-30 kt tomorrow midday to afternoon

Discussion:

VFR conditions are expected through the period. Mainly a few high
clouds will be around today before more scattered to broken clouds
move in early morning.

With surface high pressure around, winds will be light and variable
through around midnight. Winds become more solidly southerly
overnight with speeds picking up to 5-10 kt through midmorning. Wind
speeds will further increase during the day tomorrow, up to 7-15 kt
sustained by the afternoon and gusts up to 30 kt during the
afternoon hours.


&&

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

$$

AVIATION...KF
DISCUSSION...KF/Melo