Indiana’s Weather For Tuesday

HEADLINES
– Showers diminish in East Central Indiana this morning.
– Dry everywhere this afternoon through tomorrow.
– Rain chances Thursday, then dry Friday through the weekend.
– Above average highs tomorrow, and again this weekend.

TODAY’S MAP

NWS TECHNICAL DISCUSSION

A large mid/upper-level low currently resides over Indiana, with
very little in the way of forward movement. This feature should
slowly begin to exit eastward today, with weak ridging building in
before a second mid/upper low approaches from the southwest.

THROUGH MORNING

Skies have cleared across the southern portion of our CWA, with very
little wind due to a weak MSLP gradient. Combined with recent
rainfall and abundant boundary layer moisture, this has set the
stage for widespread fog development south of I-70. Some dense fog
has been noted, but is so far fairly isolated. Given the ideal
conditions, there`s little reason to think that dense fog won`t
become more common. As such, we`ve issued a Dense Fog Advisory
through 13Z for our southwestern counties.

THIS AFTERNOON

Guidance shows a weak surface low intensifying and wrapping into the
slow-moving mid/upper low during the day today, ending up near
Detroit while completing its occlusion. A few scattered showers or
even a thunderstorm is possible across our far northeastern counties
due to this. However, the surface low is far enough away that most
of our CWA will be dry.

The strengthening surface low to our northeast should also increase
the MSLP gradient enough to promote a west northwesterly breeze of
10 to 15 knots, with gusts up to 20 knots.

Moisture within the boundary layer should persist into the
afternoon, and diurnal mixing will lead to cumulus formation.
Cumulus may become a broken layer at times, especially across
southern portions of Indiana.

TONIGHT

Subsidence between mid/upper lows arrives overnight with generally
clearing skies to start. Some high cirrus from the second system
should advance into Indiana from the southwest during the night.
Some fog may develop once again but is expected to be less
widespread due to boundary layer drying.

&&

.LONG TERM (Wednesday through Monday)...
Issued at 259 AM EDT Tue May 6 2025

Wednesday...

Brief weak upper ridging will help keep Wednesday dry across central
Indiana. Moisture from an upper low to the west will try and work
into the area, and some models generate some QPF during Wednesday.
However, at the moment, feel that forcing will be too weak to bring
rain chances up to mentionable levels. Will go dry during the day.

The upper low will drift east Wednesday night, and a surface cold
front will move into the area from the north. Uncertainty is much
higher in this time frame with questions about moisture availability
and how strong forcing will be. Given this uncertainty, will stick
with consistency and keep the forecast dry.

Highs look to be in the mid 70s, but will have to keep an eye on how
much cloudiness develops.

Thursday...

The upper low to the west will be absorbed into a decent upper
trough moving through the northeastern USA. A cold front will be
near the southern forecast area. Moisture looks better for the upper
trough to work with, so will have some low PoPs around, mainly south
closer to the front. Cooler air working in behind the front will
keep the northern forecast area in the 60s with some 70s south.

Friday and beyond...

Upper ridging will work into the area from the north, keeping
central Indiana dry at least through the day Sunday. Friday morning
will have a cool start, with some temperatures around 40 in the
north. Highs will be in the 60s Friday and in the 70s Saturday and
Sunday.

Uncertainty ramps from Sunday night onward with questions about
where yet another upper low and its associated moisture will end up.
For now will bring in some low PoPs on Monday and Tuesday, with low
confidence. Blended guidance is showing highs in the 80s, but this
may be too warm if more than expected clouds and rain develop.

&&

INDY SEVEN DAY FORECAST
Today: Partly sunny. High 71.

Tonight: Partly cloudy. Low 52.

Wednesday: Partly sunny. High 76.

Wednesday Night: Partly cloudy. Low 54.

Thursday: Partly to mostly cloudy, with scattered showers. High 69.

Thursday Night: Partly cloudy. Low 43.

Friday: Mostly sunny. High 68.

Friday Night: Mostly clear. Low 45.

Saturday: Mostly sunny. High 74.

Saturday Night: Mostly clear. Low 52.

Sunday: Mostly sunny. High 78.

Sunday Night: Mostly clear. Low 55.

Monday: Mostly to partly sunny. High 81.

NWS CHARTS FOR TODAY/TONIGHT