textproduct: Indianapolis

KEY MESSAGES

- Dry yet pleasant fall weather continues through early next week with above normal afternoon highs

- Patchy fog possible in low lying areas late night/early mornings through Sunday morning

- A wetter pattern may take shape towards the Halloween weekend

FORECAST UPDATE

Issued at 952 PM EDT Fri Oct 23 2026

Similar conditions to previous nights continue across central Indiana. Clear to mostly clear skies and light winds have allowed temperatures to fall quickly this evening. Adjusted hourly temperature forecasts based on these trends in observations.

Initial high clouds are dissipating some as they try to move into the area, but some increase in high clouds is expected overnight as they finally overcome the drier air.

Lowered low temperatures some in favored cold areas, but otherwise no significant changes were made.

DISCUSSION (This evening through Friday)

Issued at 255 PM EDT Fri Oct 23 2026

Quiet weather is expected through the next seven days as surface high pressure remains dominant across the region. Guidance is in good agreement through the weekend, showing upper ridging moving eastward across the region while surface high pressure centered over the Northeast extends back into central Indiana. Large scale subsidence from these features will continue to keep the forecast dry. Light winds combined with mostly clear skies may continue to promote patchy ground fog in climatologically favored locations the next few nights.

Temperatures will slightly warm by Sunday due to return flow as surface high pressure shifts further east. An upper trough moving across Canada early next week will attempt to push a weak front into the area. Latest guidance generally shows mean flow becoming parallel to the boundary which should stall out front as it approaches. Marginal forcing and very limited moisture from the gulf remaining cutoff will likely limit any chance for measurable precipitation. A slight cooldown of a degrees may be the only noticeable impact from the system, but this will be more due to increasing clouds. Expect dry conditions to persist as surface high pressure remains in control.

Ensemble guidance begins to diverge towards late next week resulting in greater uncertainty. Limited moisture return and weak overall forcing should keep weather conditions mostly quiet. A deeper trough along with more substantial moisture advection appears increasingly likely towards the beginning of November which suggest greater chances for precipitation. Exact details remain uncertain at this time. Look for highs to generally range from the upper 60s to mid 70s through the period. Overnight temperatures will mostly fall into the 40s with slightly warmer lows possible towards the middle of next week

AVIATION (06Z TAF Issuance)

Issued at 1239 AM EDT Sat Oct 24 2026

Impacts:

- Brief visibility reductions in patchy ground fog possible overnight through 13Z Saturday

Discussion:

Outside of some patchy ground fog overnight into Saturday morning, VFR conditions are expected with surface high pressure in control.

Similar to recent history, some ground fog may develop at all but KIND. Have put in MVFR visibility, but wouldn't be surprised to see brief IFR and worse, especially at KLAF.

IND WATCHES/WARNINGS/ADVISORIES

None.