Indiana’s Weather For Saturday

HEADLINES
– Extensive low clouds clearing out by this afternoon.
– Patchy frost possible tonight across northwest portions of central Indiana.
– Above average highs again by Monday.
– Active and stormy Tuesday through Thursday.
– Potential for severe weather Tuesday afternoon and evening.

TODAY’S MAP

TUESDAY RISK

NWS TECHNICAL DISCUSSION

Quiet weather conditions are expected through the period as surface
high pressure continues to build over the region. Current satellite
imagery shows an extensive stratus deck developing across the
northern half of Indiana and pushing south. This is due to low-level
moisture remaining trapped beneath a strengthening subsidence
inversion which will result in widespread low clouds through the
morning. A stronger pressure gradient from the passing cold front
earlier tonight has also promoted breezy northwesterly winds.

A higher sun angle this time of year combined with drier air
continuing to filter in should help to clear out clouds by the
afternoon. Temperatures are going to warm up once clouds clear out
though slightly below normal highs are expected due to limited
diurnal heating initially. Northerly winds will also help limit
heating. High pressure building in will lead to a weakening pressure
gradient and weaker winds through the day. Look for highs to range
from the upper 50s across the north to 60s further south.

Mostly clear skies and lighter winds tonight favors efficient
diurnal cooling. This will allow temperatures to drop quickly with
north/northwest portions of the area likely falling into the upper
30s. Patchy frost is possible so make sure to protect any outdoor
plants. Locations further south should generally remain in the low
40s with no frost expected.

&&

.LONG TERM (Sunday through Friday)...
Issued at 252 AM EDT Sat Apr 26 2025

Upper level ridging will expand into the region for the end of the
weekend into the early part of the new week with dry conditions and
as as a warm front arrives...a return to above normal temperatures.
An increasingly active and unsettled pattern will develop by Tuesday
with the arrival of a cold front into the Ohio Valley. The front is
likely to become quasi-stationary over the region into late next
week with multiple opportunities for showers and storms. Growing
confidence in cooler weather by next weekend as a broad upper trough
develops over the eastern part of the country.

Sunday through Monday

After a chilly start Sunday morning with the potential for few spots
to dip into the upper 30s across northern parts of the forecast
area...temperatures will warm nicely through the day as return flow
develops on the back side of high pressure moving off to the east.
Much of Sunday will see plentiful sunshine but the approach of a
warm front from the southwest will spread mid level moisture into
the Ohio Valley for the afternoon and evening with an increase in
cloud cover.

Southerly flow develops Monday as the warm front lifts north
resulting in a return to much warmer temperatures. Highs on Monday
will be back near 80 degrees across central Indiana. A tightening
surface pressure gradient supports a breezy afternoon across the
forecast area.

Monday Night through Friday

Low pressure will track through the upper Midwest and into eastern
Canada Monday night into Tuesday...with a trailing cold front moving
into the region on Tuesday. Ample instability with SBCAPEs peaking
near 2500 j/kg and sufficient low level moisture will be present
over central Indiana with modest upper level dynamics as the front
sags across the forecast area late day into Tuesday night. Signals
continue to support a risk for severe weather focusing along and
ahead of the front Tuesday afternoon and evening as it shifts south
towards the Ohio River. Model soundings showing unidirectional shear
profiles suggest damaging winds as the most likely threat from
convection. Elevated cores will have the potential for large hail as
well.

The front will stall near the Ohio River on Wednesday before pulling
back north on Thursday in response to low pressure tracking into the
region. While high pressure resides over the Great Lakes...potential
for chances for rain will continue Wednesday especially over the
southern half of the forecast area. As the front and low pressure
lift into the area Thursday more widespread convection is
anticipated. Despite the periodic rain chances...highs will remain
largely above 70 through Thursday.

The front will shift east by Friday morning but the expansion of
a broad upper trough across the Great Lakes will keep the threat
for clouds and light showers possibly extending into next
Saturday. Highs will fall back into the 60s for Friday into next
weekend with cooler overnight lows in the 40s.

NWS CHARTS FOR TODAY/TONIGHT