384
FXUS63 KIND 181901
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
301 PM EDT Sun Oct 18 2026

.KEY MESSAGES...

- Patchy to widespread frost likely from late tonight to tomorrow
morning, prompting a Frost Advisory

- Dry and quiet weather persists through the next 7 days with
temperatures rebounding near to above normal by midweek

&&

.DISCUSSION (This evening through Sunday)...
Issued at 301 PM EDT Sun Oct 18 2026

Rounds of surface high pressure will continue to bring dry weather
and mostly clear skies throughout the week. Highs are expected to
remain slightly above normal for this time of year while lows
will start off slightly below normal and become near normal by
midweek.

Temperatures tonight are again expected to drop into the 30s, but
should stay in the mid to upper 30s range as more southerly flow
today will help keep conditions slightly warmer than last night.
Still expecting patchy to widespread frost across the forecast area
tonight, especially in low lying areas so have another frost
advisory from 2am to 9am. Lows the rest of the week should stay in
the 40s so not expecting the need for additional headlines at this
time.

Model soundings show persistent dry air through the column so most
days throughout the week should see largely clear skies or only a
few clouds. Chances for some clouds increase towards the end of the
week/ weekend when the upper pattern becomes a bit more amplified
and may bring in slightly more moisture.

There is some concern of worsening drought conditions and fire
weather this week given the lack of precipitation. Daily minimum RH
values will range from low 30 percentiles to around 50%. Luckily
winds will not be much of a concern, but do take precautions with
any open fires.

&&

.AVIATION (18Z TAF Issuance)...
Issued at 159 PM EDT Sun Oct 18 2026

Impacts:

- None

Discussion:

VFR conditions are expected through the period.

Surface high pressure will continue to dominate the weather pattern.
Winds will be more southerly today and expected to become light and
variable to calm overnight and into the day tomorrow.


&&

.IND WATCHES/WARNINGS/ADVISORIES...
Frost Advisory from 2 AM to 9 AM EDT Monday for INZ021-028>031-
035>049-051>057-060>065-067>072.

&&

$$

AVIATION...KF
DISCUSSION...KF