textproduct: Indianapolis

KEY MESSAGES

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

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

DISCUSSION (This evening through Friday)

Issued at 214 PM EDT Fri May 29 2026

An Omega Block pattern is developing aloft, placing an amplified upper level ridge over the central Plains this weekend through a majority of next week. Subsidence downstream of this ridge will continue to promote pressure rises, and high pressure over the Great Lakes region. To the west, an elongated pressure trough with gulf enhanced moisture will lead to numerous showers and storms across the Mississippi and Missouri Valleys.

Subsidence will be present over central Indiana for the rest of today and tonight due to the combination of upper level ridging and the high to the east. This will work to dry out the surface layer and increase mixing throughout the afternoon, but upstream cloud cover and weak easterly CAA will attempt to counteract surface warming. The combination of all of this should lead to highs in the low 80s for most of the region; NW portions may approach the mid 80s due to less easterly CAA.

This same setup will likely remain for tomorrow due to the blocking pattern, with the only uncertainty being how far east the pressure trough will reach tomorrow. The majority of ensemble solutions keep any rainfall west of central Indiana, but there is a low chance a stray shower or storm is able to reach far SW portions of the state tomorrow afternoon and evening.

Upstream, a weak surface low is expected to develop and progress along the surface trough, reaching the Ohio Valley late Sunday into Monday. This may allow for ridging to break down just enough for weak lift and showers over SW portions of the area. Confidence is very low given the Omega Block pattern is difficult to break down.

That said, confidence is increasing in this vort max reaching the Atlantic coast and strengthening, inducing stronger easterly flow towards the middle of next week. In return, this would push the Great Lakes high westward, creating very dry conditions over central Indiana from Tuesday through Thursday of next week.

AVIATION (00Z TAF Issuance)

Issued at 803 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 SE late this evening, switching to the E/ENE by morning.

IND WATCHES/WARNINGS/ADVISORIES

None.