Lafayette, Indiana 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

827
FXUS63 KIND 121822
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
222 PM EDT Sun Jul 12 2026

.KEY MESSAGES...

- Scattered showers south end by early evening

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

- Heat indices around 100 degrees on Wednesday

&&

.DISCUSSION (This evening through Sunday)...
Issued at 222 PM EDT Sun Jul 12 2026

Rest of This Afternoon and Tonight...

A weak inverted surface trough along with the proximity of an upper
trough to the south of central Indiana will keep the threat of some
scattered showers across southern portions of the area into early
evening. Forecast sounding show a lot of dry air aloft along with pa
weak inversion aloft. These will help keep thunder odds low enough
not to mention.

Otherwise clouds will decrease tonight a surface high pressure
builds into the area. Lows will be in the lower to middle 60s.

Monday...

A large upper level high will start to build into the area on
Monday. The inverted surface trough will be just south of the area.
Feel that the influence of the upper high will be enough to keep the
forecast dry. (Still wouldn`t be surprised if the extreme forecast
had an isolated shower sneak in during the afternoon, but odds are
too low to mention).

Highs will be in the middle and upper 80s.

Tuesday through Thursday...

The impressive upper high (with heights potentially near 600 dam to
the northwest of the local area) will dominate the weather through
this period. Subsidence will keep things dry and allow high
temperatures to gradually rise into mid-week. Highs will be around
90 on Tuesday and in the lower to perhaps middle 90s for Wednesday
and Thursday.

Dewpoints will return to the lower and middle 70s, which will bring
peak heat indices in the middle 90s to near 100 degrees, with the
warmest readings expected Wednesday.

Friday into next weekend...

The upper high will get pushed to the west as upper troughing moves
into the northeastern USA. Questions remain on specifically when
this will occur as well as how far west the high will get. Upper
energy moving around the high may bring some scattered showers and
thunderstorms at times.

Highs will lower into the upper 80s for next weekend. Of course
these may be higher or lower depending on if the upper high is
closer or farther away.

&&

.AVIATION (18Z TAF Issuance)...
Issued at 107 PM EDT Sun Jul 12 2026

Impacts:

- Gusty NE winds from 18-22 kts this afternoon

- Potential for patchy shallow fog at KLAF/KBMG Monday morning

Discussion:

Outside of gusty NE crosswinds at a few of the airports today,
aviation weather conditions will be fairly quiescent through the
period. Winds are expected to diminish quickly with onset of
nocturnal inversion around 00Z this evening.

Winds overnight will lighten to as low as 2-3 kts at KLAF/KBMG. With
clear skies, MIFG is possible at both sites after 08Z through 11Z.
However, confidence is not high enough to include in the TAFs.

Tomorrow will see a continuation of clear skies although a few mid
level clouds are possible during the afternoon. NE Winds will
increase to between 6-8 kts by midday and gusts should remain
under 15 kts.


&&

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

$$

AVIATION...Crosbie
DISCUSSION...50