Heritage Lake, Indiana Weather Forecast Discussion

955
FXUS63 KIND 281906
AFDIND
Area Forecast Discussion
National Weather Service Indianapolis IN
306 PM EDT Sun Sep 28 2025
.KEY MESSAGES...
- Dry with above to well-above average temperatures this week.
- Patchy fog possible during the overnights.
&&
.DISCUSSION (Today through Saturday night)...
Issued at 306 PM EDT Sun Sep 28 2025
Synoptically, the polar jet to our north is currently dominated by
large-scale ridging while a weaker more amplified subtropical jet
remains to our south. Strong ridging within the polar jet has
allowed temperatures to climb to well-above average values, with
temperatures in the mid to upper 80s this weekend. Continued above-
average warmth is expected as we head into the new week. A slight
cool down is possible as northeasterly surface winds develop
tomorrow, but even so temps will still be above normal. The diurnal
curve should be fairly steep throughout the week with conditions
favoring strong solar insolation and ideal radiative cooling at
night.
Short-wave troughs within the subtropical jet should largely pass to
our south, which will help keep moisture from lifting northward.
Strong high pressure at the surface, with the high center over the
northeastern US, will remain the dominant surface feature. Given a
lack of moisture and a largely subsident atmosphere, a very dry
stretch of weather looks to continue through the week.
One of the short-wave troughs may provide us with some mid to high-
level cloud cover Wednesday into Thursday, but that`s about it. This
week may be about as quiet as a weather forecast can be.
Additionally, our nightly patchy fog chances look to diminish as
ground moisture from recent rains continues to evaporate. Any
nightly fog should be very patchy in nature, shallow, and confined
to near rivers and in open fields prone to evapotranspiration.
Normal highs/lows in the Indy metro area this week are 73/52.
&&
.AVIATION (18Z TAF Issuance)...
Issued at 133 PM EDT Sun Sep 28 2025
Impacts:
- Brief MVFR/IFR conditions in fog possible at KHUF/KLAF/KBMG
  tonight
Discussion:
VFR conditions are expected through the TAF period, with the
exception of brief MVFR/IFR conditions at KHUF/KLAF/KBMG tonight
with shallow fog once again developing.
Diurnal cumulus is expected both this afternoon and tomorrow
afternoon. Winds will be light and variable to start before settling
on a northeasterly direction tomorrow while remaining under 10kt.
&&
.IND WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
DISCUSSION...Eckhoff
AVIATION...Eckhoff

NWS IND Office Area Forecast Discussion