textproduct: Indianapolis

KEY MESSAGES

- Lows tonight near to below freezing.

- Warmer temperatures arrive for Sunday, Monday and Tuesday.

- Next best chances for showers and thunderstorms will be Tuesday Night into Wednesday.

FORECAST UPDATE

Issued at 941 PM EDT Fri Mar 27 2026

No significant changes required to this evening's forecast.

Skies continue to steadily clear and winds weaken as diurnal cooling begins and high pressure builds into the region. Lows should range from the mid-upper 20s to around 30 by morning across central Indiana under the clear skies and relatively light winds. A pocket of light fog here or there in stream valleys and other favored areas would not be entirely out of the question but is unlikely to be significant or widespread given a slight breeze should continue through the night.

SHORT TERM (This evening through Saturday)

Issued at 308 PM EDT Fri Mar 27 2026

Clouds continue to linger across central Indiana, prolonging the cooler temperatures into the afternoon hours. Current satellite does show the cloud deck starting to thin slightly in a few spots, and the expectation is that erosion will slowly continue through remainder of the day. Should clouds erode in time, the forecast highs of mid 40s to low 50s could still be realized but there unfortunately remains only moderate confidence at this time.

Tonight, skies will start to clear out during the early morning with radiational cooling expected to bring lows back below freezing.

The surface low that brought storms last night will continue to exit further east through tomorrow. In its place, an expanded surface high will meander through the Ohio Valley Saturday allowing for calmer winds, clear skies, and a pleasant spring day.

LONG TERM (Saturday night through Friday)

Issued at 308 PM EDT Fri Mar 27 2026

Upper flow will turn mainly zonal for much of next week with a subtle upper short wave or two bringing rain and thunder chances from Tuesday and on. By Sunday, surface winds will solidly be out of the south to southwest behind a passing surface high pressure system, allowing for a return of above normal temperatures. The pattern for next week will help keep temps above normal for quite some time with the exception of brief reprieves following fronts associated with the upper waves expected to move through.

By Tuesday Night, Indiana will be solidly in the warm sector ahead of an approaching cold front associated with the previously mentioned upper wave. Again, as we have seen with recent systems, another round of showers and storms will be expected as this system passes on Tuesday night and Wednesday. In the wake of the front on Wednesday, the roller coaster temperature ride will continue as cold air advection returns sending temperatures back to the 50s for highs. There does remain uncertainty as to what time the front will pass through so timing on temperatures and PoPs comes with only moderate confidence at this time.

Looking at Thursday, there remains further uncertainty as strong high pressure remains overt the Great Lakes but the frontal boundary is suggested to linger across KY and TN as a weak area of low pressure passes. Depending upon how far south that frontal boundary gets, will likely determine our rain chances through the end of the week.

AVIATION (00Z TAF Issuance)

Issued at 700 PM EDT Fri Mar 27 2026

Impacts:

- None

Discussion:

As high pressure builds into the region, ceilings are quickly breaking up, and VFR conditions under mostly clear skies are expected through the period.

Winds will drop below 10KT overnight, generally out of the northwest. As the high moves overhead late tonight into Saturday, winds will become variable but remain below 10KT.

With last night's rainfall, a spotty area of fog is certainly not out of the question, but this would be primarily in valleys and other low spots, and is unlikely be widespread or have any impact on the sites given winds remaining around 4-7KT overnight.

IND WATCHES/WARNINGS/ADVISORIES

None.