HEADLINES
– Quieter weather continues, with a gradual increase in heat and humidity.
– Isolated late afternoon and evening storms. Better chances Tuesday afternoon.
– No big rain amounts, nothing severe, no tropical humidity and no 90s this week!
TODAY’S MAP
NWS TECHNICAL DISCUSSION
Main focus for the short term period today will be tracking an inverted trough with some tropical influences and how it is expected to bring isolated to scattered showers and thunderstorms to portions of southern Indiana. As of early this morning, coverage in showers is limited to just the far southern portions of the state, but expect to see at least a few showers towards Vincennes and Bedford towards daybreak. By mid-afternoon diurnal heating will allow for 1000-15000 J/kg of CAPE. This instability combined with forcing associated with the trough to bring increased coverage in showers and better chances for rumbles of thunder. Primary concerns with these showers and storms will be localized flooding due to heavy rain rates and slow storm motion. Areas to the north and east of Indianapolis should remain dry today with model soundings showing a lack of the deeper moisture as compared to areas closer to Vincennes. Temperatures will remain cooler than normal today with expected highs in the low 80s but as low level moisture advects into the area, dew points in the low to mid 60s will become more widespread towards the evening. Tonight. As diurnal heating comes to an end shower coverage should gradually decrease through the night but with the trough in the vicinity, at least a few showers should continue through much of the night especially as models continue to show moisture advection in the lower levels. The increased near surface moisture will keep temperatures more mild tonight with expected lows in the mid 60s. && .LONG TERM (Tuesday through Sunday)... Issued at 131 AM EDT Mon Aug 4 2025 Tuesday Through Thursday. A similar pattern will continue Tuesday into Wednesday with the aforementioned trough stalling across the lower Ohio Valley which will bring daily chances for showers and storms through Wednesday, mainly across the southwestern counties but with coverage increasing towards central and north central Indiana. Highs will also gradually warm through the week as the surface flow gains a slightly more southerly component with highs in the mid 80s by Wednesday. The trough will become more diffuse on Thursday which coincides with the ridge to the west gradually building eastward and helping push the jet stream further north into Canada. This will help to limit the rain chances Thursday other than a stray diurnally induced thunderstorm. Friday Through Sunday. Hot and humid conditions expected Friday into the weekend with model soundings showing convective temperatures likely to be reached which combined with a lack of warmer air aloft to allow for diurnally driven convection each afternoon. Daily highs should climb into the upper 80s to near 90 with dew points in the low 70s. These will combine to bring elevated heat risk with peak heat index values in the mid to upper 90s, but without the richer surface moisture that was seen last week, heat headlines look unlikely at this time. Looking into early next week, a frontal system looks to move through bringing better chances for rain before stalling and leading to a period of hot and humid conditions through much of the week.
INDY SEVEN DAY FORECAST
Today: Partly to mostly cloudy. An isolated shower or storm is possible in the late afternoon. High 83.
Tonight: Clouds increase, with spotty showers and storms, especially overnight. Low 65.
Tuesday: Partly sunny. Scattered showers and storms in the afternoon. High 84.
Tuesday: Spotty evening showers and storms. Low 66.
Wednesday: Mostly sunny. High 84.
Wednesday Night: Mostly clear. Low 67.
Thursday: Mostly to partly sunny. High 86.
Thursday Night: Partly cloudy. Low 67.
Friday: Partly sunny. Humidity becomes more tropical again. High 87.
Friday Night: Partly cloudy. Low 69.
Saturday: Partly sunny. High 89.
Saturday Night: Partly cloudy. Low 70.
Sunday: Partly to mostly cloudy. Scattered showers and storms. High 90.

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