HEADLINES
– Warming trend back to the low 90s by Friday.
– Heat indices mid 90s to near 100 degrees this weekend.
– Scattered showers and thunderstorms return Sunday.
TODAY’S MAP
NWS TECHNICAL DISCUSSION
A typical midsummer weather pattern continues for much of the CONUS with ridging and high pressure remaining the dominant weather features locally. Little change made to the forecast for today as each day this week will have very similar conditions to the previous one. Main ridge axis is still to the west of Indiana today, keeping the core of the heat and humidity over the Plains. Subsidence from high pressure aloft keeps large scale systems and precipitation away from the area for the most part. A weak upper system passing through the Great Lakes region this morning may result in remnant boundaries sagging southward into Central and North Central Indiana this afternoon. Best forcing for ascent will be displaced well to the north and east and with high pressure overhead, these remnant boundaries likely won`t have much impacts. There is a slight chance (less than 20% chance) of an isolated pop up shower or storm north of the I-70 corridor during peak heating of the day as the overall environment will be unstable this afternoon; however with little forcing and no shear, not expecting anything organized to develop. The majority of the region will stay hot and dry today, but it is worth mentioning the possibility of a rogue shower or storm this afternoon. Other than that, the environment supports highs in upper 80s once again today, likely a degree or two warmer than yesterday. Overnight lows start warming back up again into the upper 60s to low 70s as flow turns southerly as ridging and high pressure slide eastward. && .LONG TERM (Friday through Wednesday)... Issued at 259 AM EDT Thu Jul 3 2025 Another stretch of summertime heat continues through the weekend for all of Central Indiana. While conditions are not expected to be as oppressive as they were last week, both humidity and temperatures will continue to rise over the next several days. Storm chances increase Sunday and into the next week. Strong ridging across the Central and Northern Plains slides eastward this weekend, resulting in a gradual warming and moistening trend as the core of the heat and humidity push closer to the state. Expect each day to be a few degrees warmer and more humid than the previous day in this pattern with highs reaching the lower 90s for the 4th of July and this weekend. Dew points may reach or exceed 70 degrees again, especially by Sunday, resulting in heat indices approaching the 100 degree mark again during the afternoon hours. Large-scale ridging begins to break down over the weekend with guidance consistently to show a weak trough and cold front approaching from the northwest on Sunday. Guidance today has continued the trend of slowing down the eastward progression of a trough and associated low pressure system moving into the Upper Great Lakes this weekend, keeping conditions relatively hot and dry through at least the first half of the day Sunday. In these large scale blocking patterns, it is common for longer range guidance to struggling with how ridging breaks down and typically tries to bring in precipitation too soon. Would not be surprised to see future model runs further slow down the incoming trough and frontal boundary. Keeping a chance for storms in the forecast Sunday afternoon into Monday and will fine tune PoPs and exact timing of the greatest storm threat as confidence increases in the coming days. The pattern going into next week looks fairly typical for July with highs in the 80s, humid conditions, and additional storm chances. Keeping a chance of storms in for Monday as there is lower confidence on the timing of the aforementioned frontal passage. Tuesday could potentially be the driest day next week as longer range guidance and ensembles indicate a more active pattern setting up mid next week and beyond with more frequent precipitation chances... yet still warm and humid. nbsp; INDY SEVEN DAY FORECAST Today: Mostly to partly sunny. Isolated shower or storm possible in the afternoon. High 90. Tonight: Clouds decrease, but humidity will increase. Low 70. Independence Day: Mostly sunny, hot and humid. High 91. Friday Night: Mostly clear. Low 71. Saturday: Mostly sunny. High 92. Saturday Night: Mostly clear. Low 73. Sunday: Partly sunny. Scattered showers and storms, mainly in the afternoon. High 91. Sunday Night: Scattered showers and storms. Low 71. Monday: Partly to mostly cloudy. Scattered showers and storms. High 87. Monday Night: Scattered showers and storms early. Partly cloudy later. Low 68. Tuesday: Partly sunny. A little less humid. High 86. Tuesday Night: Partly cloudy. Low 67. Wednesday: Partly to mostly cloudy. Scattered showers and storms. High 86.
NWS CHARTS FOR TODAY/TONIGHT 
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