Overview
- Many regions are already facing hot, humid conditions with daytime highs in the 90s and heat‑index values in the upper 90s to the triple digits.
- The National Weather Service is monitoring heat‑index readings near or above 108 degrees and may issue heat advisories if combined temperature and humidity thresholds are met.
- A short period of drier, more comfortable air is expected under building high pressure midweek, but model guidance and local offices show rain chances rising Wednesday through Friday with more widespread heavy showers and thunderstorms.
- The Atlantic tropical basin is forecast to remain quiet for the next seven days, and recent rain has produced localized improvements on the drought monitor in some areas.
- Officials confirmed an unusually active severe season in the Midwest, with Illinois recording 149 confirmed tornadoes so far this year, a new state annual record that underscores the season’s extremes.