textproduct: Indianapolis

KEY MESSAGES

- Dry weather will continue through Friday with warm daytime highs in the 70s.

- Patchy fog may occur in low lying areas late night/early mornings

- A wetter pattern may take shape for the Halloween weekend and/or the following week.

DISCUSSION (This evening through Sunday)

Issued at 232 PM EDT Sun Oct 25 2026

Rest of This Afternoon through Tuesday...

High clouds and some mid clouds will continue to spill across an upper ridge through Tuesday, bringing partly cloudy conditions at times.

The ridge itself will get pushed south a bit by upper waves well to the north of the local area. This will allow a surface cold front to sag south into central Indiana later Monday into Monday night. This front will get pulled back north as a low pressure system moves into Minnesota on Tuesday. With minimal moisture and little or no forcing, no rain is expected with the front.

The cooler air behind the front most likely won't reach into central Indiana. Thus, expect highs in the 70s to continue with lows in the 40s. Patchy ground fog will develop near sunrise Monday and Tuesday with light winds continuing. The fog may be muted by thicker cloud cover though.

Wednesday through Friday...

A weakening upper wave will move northeast into the lower Great Lakes Wednesday. This may bring additional clouds but again forcing and moisture across central Indiana will be low enough to continue a dry forecast.

A surface cold front will try and work south Thursday and Friday. Guidance differs on how far south this front gets by late Friday. With upper flow generally west to southwest ahead of another upper wave, feel that the front will likely remain north of the area. Will continue a dry forecast and go with the warmer guidance.

This means that highs will continue to be in the 70s, with perhaps some upper 70s for parts of the area.

Halloween Weekend...

Any lingering upper ridging will exit as multiple upper troughs move through next weekend. Uncertainty remains high on the details, but for now it appears that the best forcing and moisture will arrive overnight Saturday night into Sunday morning, with only low chances for rain during Halloween evening events.

If the front remains north, highs will be in the 70s. However, a more southern front as well as any rain would keep readings lower, especially on Sunday.

AVIATION (18Z TAF Issuance)

Issued at 1254 PM EDT Sun Oct 25 2026

Impacts:

- Ground fog possible near 12Z Monday, MVFR and worse possible

Discussion:

Outside of any ground fog early Monday, VFR conditions are expected through the period.

High clouds will move through at times through the period, with some mid cloud around on Monday as well. Similar conditions to previous nights will lead to patchy ground fog developing again. Thicker high clouds might lower the odds, but for now will still put in a TEMPO for MVFR at KLAF/KHUF around 12Z Monday. Cannot rule it out at KBMG as well.

Winds will remain light. A shift to a more northerly direction will occur at KLAF later Monday and at KIND Monday evening.

IND WATCHES/WARNINGS/ADVISORIES

None.