textproduct: Indianapolis

KEY MESSAGES

- Dry weather expected today through the middle of next week.

- Near-average temperatures through the weekend into next week.

FORECAST UPDATE

Issued at 949 AM EDT Fri May 29 2026

The majority of the forecast today will remain mundane as central Indiana sits on the periphery of an elongated surface trough to the west and high pressure to the east. Subsidence due to the combination of upper level ridging and the high to the east will work to dry out the surface layer and increase mixing throughout the day, but upstream cloud cover and weak easterly CAA may slightly counteract surface warming. This is leading to some uncertainty in afternoon highs across the state, but in general should top out near to just above 80F.

DISCUSSION (Today through Thursday)

Issued at 300 AM EDT Fri May 29 2026

An Omega Block pattern is expected to develop aloft into the weekend with ridging centered over the central CONUS and central portions of Canada. Meanwhile, surface high pressure generally remains in control across the Great Lakes region. This will likely promote dry weather conditions through most or all of the forecast period. Look for increasing mid-high cloud cover late today into Saturday as a band of moisture associated with a disturbance lifts northeastward.

Upper ridging may briefly break down just enough late this weekend to allow a weak shortwave to move in from the west. Confidence is very low given the Omega Block pattern is difficult to break down, but if the disturbance does not dissipate before reaching the region then an isolated shower cannot be completely ruled out late Sunday or Monday.

Models are becoming better aligned into early next week depicting the Omega Block pattern reinforcing itself while the ridge retrogrades slightly. Guidance then suggest a shortwave dives south across the eastern Great Lakes sweeping a weak cold front through the area. Precipitation is not expected due to very limited moisture though the weak front could slightly cool temperatures. Surface high pressure would likely become the dominant weather feature behind the frontal passage resulting in more mundane weather through the middle of next week

AVIATION (18Z TAF Issuance)

Issued at 1235 PM EDT Fri May 29 2026

Impacts:

- None

Discussion:

VFR conditions expected.

Ridging aloft and surface high pressure over the Great Lakes will keep VFR conditions through the period. Upper level clouds will continue to pass through around 25000ft. Winds will remain light (less than 10kt) out of the ESE today, switching to the E/ENE tonight.

IND WATCHES/WARNINGS/ADVISORIES

None.