textproduct: Indianapolis

KEY MESSAGES

- Isolated/scattered showers and a few t-storms are possible early this morning with isolated convection possible again late today

- Cooler and less humid weather expected Sunday through Tuesday with highs mainly in the 70s to low 80s.

- Areas of late night/early morning fog will occur Saturday and Sunday nights.

- Dry weather expected Monday and Tuesday with increasing chances for rain and storms mid-late next week.

DISCUSSION (Today through Friday)

Issued at 302 AM EDT Sat Aug 22 2026

Today through Sunday...

Expect multiple embedded waves within upper troughing to move through the region this weekend while northwest flow persists. Current KIND radar imagery depicts scatters showers and a few storms pushing into central Indiana early this morning. This convection is associated with an MCS which has been gradually weakening through the overnight as it is outpacing the more unstable environment back across IL. Additional showers and a few storms are possible through the morning with the disturbance pushing through, but weak forcing will limit coverage.

Look for winds to turn northwesterly by mid-morning once a cold front passes. Drier air filtering in should promote mostly dry conditions later today into tonight. However, a subtle backdoor front and marginal low-level moisture could support a few showers or a stray storm, mainly across far northwestern counties. Light winds combined with mostly clear skies Saturday night supports the potential for patchy fog. Any fog that develops will quickly mix out Sunday morning. Another subtle impulse could promote a few light showers over far NE counties Sunday afternoon. Otherwise, look for pleasant weather with cooler weather from persistent northwest flow. Highs on Saturday are expected to range from the upper 70s to low 80s whiles highs on Sunday generally range from the mid 70s to low 80s. Sunday night through Tuesday...

Broad area of surface high pressure will push SE into the Ohio Valley through the period, providing for much drier conditions, with dewpts falling into the 50s. As a result most areas will see low temperatures in the 50s Sunday night. Light winds and mostly clear skies will lead to another night with areas of fog Sunday night. A weak system in the NW flow aloft is expected to move across the MO/mid-MS valleys Monday into Tuesday. At present the only expected effect from this system will be increasing mid-high clouds. This should limit fog chances Monday night and keep high temperatures in the 70s most areas Monday and Tuesday.

Wednesday through Friday...

Another upper wave/surface cold front will move through during the period. Confidence in timing is very low considering the system is currently off the west coast, so for now will only have some low PoPs. Seasonable temperatures are expected with increasing humidity with increasing SW flow in the low levels.

AVIATION (12Z TAF Issuance)

Issued at 653 AM EDT Sat Aug 22 2026

Impacts:

- A stray shower or storm cannot be ruled out today

- Low chance for brief fog at outlying sites through 12Z today, fog possible at the outlying sites late tonight

- NW winds sporadically gusting up to 18-22 kt today

Discussion:

Predominately VFR conditions are expected today, but a stray shower or storm cannot be ruled out today. Brief fog may develop at the outlying sites through 12Z, additional fog is possible at the outlying sites late tonight. Brief MVFR ceilings cannot be ruled out between 12-16Z today near LAF/IND.

Winds will increase and veer slightly to 290-320 degrees later this morning. Winds may sporadically gust up to 18-22 kt through late afternoon. Morning cloud cover could limit diurnal mixing and peak gusts slightly.

IND WATCHES/WARNINGS/ADVISORIES

None.