textproduct: Indianapolis

KEY MESSAGES

- Chances for rain and storms returns for much of the upcoming week with a risk for severe weather focused late Tuesday into Wednesday

- Warm temperatures expected all next week with multiple days in the lower to mid 80s. Record temperatures are possible.

DISCUSSION (This evening through Sunday)

Issued at 204 PM EDT Sun Apr 12 2026

Rest of This Afternoon through Monday Night...

Breezy and warm conditions will continue this afternoon under partly to mostly cloudy skies. Tonight, an upper wave and upper jet will move through, providing some lift. The best lift looks to be northwest of the area, closer to the wave itself. Overall moisture isn't great, but it will be enough for some scattered to perhaps numerous showers to move through tonight into perhaps Monday morning. Will go chance category to low end likely category PoPs.

For Monday afternoon and Monday night, central Indiana will remain in southwest flow aloft. Weak upper impulses may trigger an isolated shower or storm, so will have slight chance PoPs at times.

There will be enough instability for the potential of isolated thunderstorms, but nothing strong or severe is expected.

Lows tonight will be in the 60s with the clouds and showers around. Highs on Monday will be in the upper 70s to lower 80s, with readings depending somewhat on how fast clouds break up.

Tuesday through Friday...

The upper pattern will continue to be upper troughing across the western USA with upper ridging over the far southeastern USA. Central Indiana will be in southwest flow aloft. A surface front will initially be well west and north of the area, but it will get closer by Friday. Southwesterly flow will keep temperatures well above normal and keep decent moisture in the area.

An initial round of upper energy will move through around Tuesday, generating showers and thunderstorms especially near the front to the west and north of the area. Parameters indicate that strong to severe storms are possible, mainly west of central Indiana. However, some of these may get into the far northern and northwestern portions of the area. Locally heavy rain will be a threat.

A stronger upper wave will move through Wednesday/Wednesday night. This may produce more widespread rain to the area, but the severe threat looks to remain west, closer to the surface front. Locally heavy rain will be a threat again.

The upper wave may push the surface front closer to the area in its wake, which may keep the threat of rain around at times into Friday. However, lack of upper forcing will keep the chances lower.

Saturday and Sunday...

The upper trough will move into the area next weekend and push the surface front through. This will result in more showers and storms. Severe storms may occur depending on timing of the front, but confidence is low in details. Much cooler air will move in behind the front for Sunday.

AVIATION (18Z TAF Issuance)

Issued at 1251 PM EDT Sun Apr 12 2026

Impacts:

- Wind gusts of 25 to 30kt this afternoon - Low level wind shear developing this evening - Scattered showers mainly late this evening into the overnight - MVFR ceilings possible late tonight into Monday morning

Discussion:

Gusty winds will continue this afternoon with peak gusts near 30kt possible. Gusts will diminish some tonight, but strong winds aloft will persist this evening. Will continue to mention low level wind shear.

Mainly scattered showers will move across the sites tonight. Confidence in coverage isn't high enough to go anything beyond PROB30s at most sites. Brief MVFR visibility is possible. After the showers pass, ceilings may lower to MVFR for a period late tonight into Monday morning, but confidence isn't high.

CLIMATE

Issued at 204 PM EDT Sun Apr 12 2026

Within the setup described in the discussion above, near record temperatures are possible at times this week, mainly Tuesday, Wednesday, and Friday. Whether readings get close depends on sky cover and any rain staying away, which keeps confidence lower at this time.

Current deterministic model runs are cooler than the records, but the potential exists to get within a few degrees if everything lines up. On Tuesday April 14, Indy's record high is 85, set in 1883. Indy's record high for Wednesday is 84, set in 2002. On Friday April 17, Indy's record high is 87, set in 1896.

Record high minimum temperatures are also in play at times given the warm and relatively humid airmass. The first opportunity for this comes Monday, when the record high minimum at Indy is 63, set in 2014 and tied in 2018. At the moment, the forecast is for tying that number.

IND WATCHES/WARNINGS/ADVISORIES

None.