Overview
- NOAA’s Storm Prediction Center, which issued multiple Tornado and Severe Thunderstorm Watches Monday, highlighted a corridor from central Missouri into southern Illinois for an afternoon and evening uptick in supercells.
- SPC forecasters said a few strong to intense tornadoes are possible along with very large hail and damaging winds as a strengthening low‑level jet overlaps rich Gulf moisture and strong wind shear.
- Mesoscale discussions called for new or extended watches with high probabilities as storms develop along retreating outflow boundaries and a nearby cold front.
- Analysts noted that discrete supercells could merge into lines later, which would raise the risk for destructive straight‑line winds and brief, embedded tornadoes.
- The broader severe threat reaches across parts of the Midwest and Mid‑South and could affect tens of millions of people, with pockets of flash flooding where repeated storms train over the same areas.