Overview
- Sunday night tornado warnings were issued around the Chicago area and at least one radar‑confirmed touchdown occurred, with overnight flooding reported in Walworth and western Racine counties.
- Forecasters say another round of scattered severe storms will affect the Chicago region Monday from late afternoon into the overnight hours, with damaging winds, hail and isolated tornadoes possible.
- The Storm Prediction Center and local NWS offices warn that Tuesday’s wave could organize into a fast‑moving line or bow that would raise the threat of widespread damaging winds, but timing and exact placement remain uncertain.
- Heat advisories in the Tri‑State/NYC and parts of the Mid‑Atlantic will push heat indices toward the upper 90s, and forecasters caution any storms there could produce torrential downpours capable of flash flooding.
- The active pattern is expected to continue through at least midweek before a slow cold front brings cooler, drier air later in the week; officials urge people to monitor National Weather Service watches and warnings and prepare for possible power outages and localized flooding.