Lafayette, Indiana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

945
FXUS63 KIND 181816
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
216 PM EDT Thu Jun 18 2026

.KEY MESSAGES...

- A few showers are possible late this afternoon.

- The next best chance for rain will be Sunday into Monday

- Below normal temperatures will continue for much of the period

&&

.DISCUSSION (This evening through Thursday)...
Issued at 216 PM EDT Thu Jun 18 2026

Surface analysis early this afternoon shows low pressure over
eastern Ontario, providing cyclonic flow across Indiana. High
pressure was found across the NW plains states. A frontal boundary
was found still lingering across KY. A secondary cold front was
pushing south across Indiana. GOES19 shows convection over KY,
associated with the frontal boundary. Otherwise, some high clouds
were pushing across IL into IN within the WNW flow aloft. A few
showers were found with this. Water vapor overall shows mainly a
zonal flow in place across the CONUS, with subsidence in place
across the plains into Indiana. Large Surface high pressure was
found over the northwestern plains, building east.

Tonight...

Clouds associated with the passing weak upper wave will quickly exit
the area overnight as high pressure continues to build across
Indiana. This will lead to mostly clear skies. Cold air advection
and falling dew points should allow for lows in the middle 50s.

Friday through Saturday...

The large surface high pressure system over the plains will drift
toward and across Indiana on Friday through Saturday, providing fair
and mild weather. Time heights show broad subsidence remaining in
play through this period as little in the way of upper forcing
passing in the W-NW flow aloft. That flow was due to the weak
ridging building across the western CONUS. Otherwise, forecast
soundings show a dry column on Friday that should lead to partly
cloudy skies at that time.

Forecast soundings on Saturday show some mid level saturation, but
dry lower levels as some slight warm air advection comes in to play.
We will expect a few more clouds on Saturday as compared to Friday,
but there will still be some sun. Expect below normal temperatures
with highs near 80.

Sunday and Monday...

Sunday and Monday will be the next best chance for showers and
thunderstorms across Central Indiana. Within the mainly zonal flow
aloft, a moderate short wave will pass across Indiana. An associated
warm front will approach central Indiana early Sunday morning,
followed by an area of surface low pressure and associated cold
front passing across Indiana on Monday. Ample moisture appears in
place as this forcing passes. Thus continued chances for showers and
thunderstorms will be needed.

Tuesday through Thursday...

Mainly dry weather will be expected through this period. The mainly
zonal flow will remain in place aloft and little in the way of
forcing dynamics are suggested to pass until Thursday. Surface high
pressure will be lingering across the area on Tuesday through
Thursday, with mainly westerly flow in place. Thus only some low
pops will be included for now on Thursday as the subtle forcing
aloft is suggested at the moment. The mainly zonal flow aloft with
will keep hot and humid air at bay, resulting in slight below normal
temperatures.

&&

.AVIATION (18Z TAF Issuance)...
Issued at 1255 PM EDT Thu Jun 18 2026

Impacts:

- VFR this TAF period

Discussion:

VFR conditions are expected through the period.

Some mid and high clouds will pass across the HUF and IND TAF sites
this afternoon. Some very light rain showers will be possible as
they pass. A window of VCSH was used to account for this.

High pressure and an associated dry air mass will arrive across
Central Indiana tonight. This will lead to dry weather with minimal
cloud cover, and continued VFR conditions.

Some VFR cigs will be possible by late Friday morning as daytime
heating allows CU development.


&&

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

$$

AVIATION...Puma
DISCUSSION...Puma