textproduct: Indianapolis

KEY MESSAGES

- Clear skies advancing southward through tonight

- Much cooler air around Saturday and again early next week. Potential for lows in the upper 30s in the northeast Monday night.

FORECAST UPDATE

Issued at 1000 PM EDT Fri Oct 2 2026

Transition to overdue fall conditions will continue tonight across central Indiana as thick fetch of BKN mid cloud slowly departs south central and southeastern zones late this evening. Otherwise mainly clear skies will oversee north-northeasterly winds around 5-10 mph flowing out of the broad and strong Canadian air mass slowly crossing east-central North America. Low chances in any organized fog tonight between elevated winds and advection of lower dewpoints outperforming lower temperatures. Nevertheless expect lows by early Saturday to range from 44F in Carroll County to 51F in Washington.

DISCUSSION (This evening through Friday)

Issued at 215 PM EDT Fri Oct 2 2026

Rest of This Afternoon through Saturday...

Forcing continues to shift south this afternoon, keeping the bulk of the rain south of central Indiana. There could be some sprinkles/light drizzle in the south as some light returns have been seen on radar. Will keep some low PoPs south, diminishing from the north as the afternoon progresses.

Clouds will take longer to diminish though. Lower clouds will diminish first, then mid and high clouds will eventually exit as well. Skies likely won't be mostly clear all areas until during the overnight.

High pressure will rule Saturday into Saturday night, providing quiet conditions. Some high clouds will move in from the south later Saturday into Saturday evening. Otherwise, skies will be mostly clear.

Lows tonight and Saturday night will be in the 40s to around 50. Highs Saturday will be in the mid 60s to lower 70s.

Sunday onward...

Northwest flow aloft will continue across central Indiana next week. At the surface, high pressure will be in control for most of the period.

A cold front will move through on Sunday, but the front won't have any moisture to work with as the Gulf is cut off. Another cold front will move in around Thursday night, but it too will have limited or no moisture to work with. Thus, will go with a dry forecast throughout the week.

Temperatures will rebound to above normal on Sunday ahead of the front, then return to below normal for Monday and Tuesday. Low temperatures may fall into the upper 30s across the northeastern forecast area Monday night. With light winds and mostly clear skies, will have to watch for the potential for patchy frost in favored cold areas.

As high pressure moves east of the area mid-week, southerly winds will bring back temperatures to above normal. There is some uncertainty on how much cooler air will be behind the late week cold front. Present indications that not much cooler air will move in before upper heights rise again and bring in warmer air beyond the 7 day period.

AVIATION (00Z TAF Issuance)

Issued at 738 PM EDT Fri Oct 2 2026

Impacts:

- Easterly winds gusting up to 15KT Saturday

Discussion:

VFR conditions to prevail across central Indiana through Saturday evening as broad and cool autumnal Canadian air mass slide from the Great Lakes to Maine. BKN mid cloud to push south of KBMG by 02Z this evening, with mostly clear skies for the remainder of the TAF period across the region...although FEW/SCT cirrus may return over KIND after 00Z Sunday.

North-northeast winds sustained around 7KT tonight should wane slightly pre-dawn for outlying terminals. Surface flow to veer to easterly Saturday with winds increasing slightly to around 10KT.

IND WATCHES/WARNINGS/ADVISORIES

None.