INDIANAPOLIS — It's going to get worse before it gets better.
This Evening:
As expected, there was not as much storm coverage in central Indiana this afternoon. However, spotty downpours remain possible until a few hours after sunset and the coverage today has been more focused in east-central Indiana, especially in Wayne and Randolph counties. This evening and this weekend it will be a good idea to check radar before heading out or if you're going to be on the lake, especially during peak-heating hours.
This Weekend:
Storm coverage increases a bit Saturday afternoon with the approach of an upper air disturbance. The greatest coverage of storms on Sunday may actually be in the morning from a remnant storm complex drifting in from the northwest. Eventually the atmosphere may become "capped" with too much warm air to limit cloud/storm production Sunday afternoon.
Heat Wave Early Next Week:
Humid heat remains a big part of the weather story and it will peak Sunday into Tuesday of next week with heat indices near 100° and the Heat Stress Index (combination of temperature, humidity, wind speed, sun angle, and cloud cover) reaching Moderate those days. In that zone it's recommended to take half-hour breaks for every hour you're outside.
Cool Change Ahead:
That heat wave snaps in a big way later next week with a 3-4 day pattern shift to much cooler, less humid air Thursday into next weekend. The early call is for a couple of days of highs in the 70s and low in the 50s. If that verifies, it would coincide nicely with the Brickyard 400 this year at IMS.
