Indiana’s Weather For Tuesday

HEADLINES
– Another stretch of seasonably hot weather, with lower humidity this afternoon through Thursday.
– Flash flooding ongoing for portions of southwest and south central Indiana.
– 90+ and humid air back on the Fourth Of July.
– Scattered showers and thunderstorms return Sunday.

TODAY’S MAP

NWS TECHNICAL DISCUSSION

- A much drier week ahead with a warming trend back to the low 90s
ther stretch of summertime heat and humidity is expected through
the rest of the week, but fortunately the level of heat is not
expected to as oppressive as last week`s heat wave. Surface high
pressure quickly builds in from the north and west through the day,
advecting in a slightly drier airmass while working to push morning
storms off to the east. Ample sunshine and low level mixing will
still result in a warm day for Central Indiana with highs pushing
the mid to upper 80s. Dry air advection from the north and mixing
lead to dew points dropping through the day into the 60s for most
areas, which will be quite noticeable compared to recent humidity.
Areas which saw overnight rain may take longer to dry out than areas
along and north of the I-70 corridor.

Tonight...

Good conditions for radiational cooling set up tonight as the
pressure gradient weakens with high pressure centered over
Missouri. Tonight may be the first night that many areas drop below
the 70 degree mark in almost 10-14 days! A drier airmass in place
plus radiational cooling will result in dropping temperatures into
the low to mid 60s for much of Central Indiana.

&&

.LONG TERM (Wednesday through Monday)...
Issued at 151 AM EDT Tue Jul 1 2025

Another stretch of summertime heat expected again for the rest of
the week and into the week for all of Central Indiana. While
conditions are not expected to be as oppressive as they were last
week, both humidity and temperatures will be on the rise into the
weekend.

Strong ridging develops across the Central and Northern Plains this
week and slowly slides eastward into the weekend. The low and upper
ridge axis remain well to the west midweek, keeping the core of the
heat and humidity further west as well, but still maintaining
relatively warm and dry conditions locally. The ridge axis moves
overhead Friday then  slides east of the region, resulting in a
warming trend back to the 90s as the core of the heat and humidity
advect into the Ohio Valley and Great Lakes.

Midweek features highs in the mid to upper 80s with relatively lower
humidity values than seen over the past several weeks.
Northwesterly flow on the east side of the surface high and
associated ridging will largely prevent Gulf moisture from surging
northward, keeping oppressive dew points in the 70s well south of
the region. Low level mixing Wednesday and Thursday afternoon may
even bring enough dry air to the surface for dew points to fall into
the upper 50s briefly...relatively dry and comfortable for this time
of year.

A gradual warming and moistening trend occurs during the week, with
each day being a few degrees warmer and more humid than the previous
day as ridging slowly progresses eastward.

July 4th: Mid to long range guidance continues to be in agreement
with ridging moving overhead by Friday and low level flow becoming
southerly. Confidence is increasing in highs reaching the lower 90s
for much of Central Indiana with dew points making a run for 70
degrees again. While hazardous heat conditions are not expected at
this time, increasing heat and humidity result in afternoon heat
indices approaching 100 degrees. NWS Heat Risk already shows a
moderate risk for heat for the 4th of July, as sensitive populations
may need to take precautions if out in the heat all day.

Large-scale ridging looks to break down over the weekend with
guidance showing a weak trough and cold front approaching from the
northwest. With increasing dew points and instability, some showers
and thunderstorms are possible Saturday night and Sunday. Flow aloft
is very weak on Saturday, so any activity should be pulse-like pop-
up in nature, and coverage is likely to remain low. However, higher
confidence exists in a more widespread threat for storms Saturday
night into Sunday as a front pushes into the region. As of now,
timing of the front looks to be overnight Saturday night into
Sunday; however with this being more than 5 days out, there will
likely be small shifts regarding timing of the convection. Higher
confidence exists in Saturday being the drier day next weekend, with
a great coverage for storms on Sunday.

INDY SEVEN DAY FORECAST
Today: Some early morning showers. Clouds and humidity decrease in the afternoon. High 87.

Tonight: Mostly clear. Low 65.

Wednesday: Mostly sunny. High 86.

Wednesday Night: Mostly clear. Low 67.

Thursday: Mostly sunny. High 88.

Thursday Night: Mostly clear. Low 69.

Independence Day: Mostly sunny. High 90.

Friday Night: Mostly clear. Low 71.

Saturday: Mostly sunny. High 91.

Saturday Night: Partly cloudy. Low 72.

Sunday: Partly to mostly cloudy. Scattered showers and storms. High 90.

Sunday Night: Scattered showers and storms. Low 71.

Monday: Mostly cloudy. Scattered showers. High 86.

NWS CHARTS FOR TODAY/TONIGHT