Overview

• The SPC issued Tornado Watch 610 for North Dakota and northern South Dakota, where an MCV-anchored supercell cluster produced several tornadoes and maintained a localized tornado risk into north-central North Dakota Sunday evening.
• Severe Thunderstorm Watch 611 covered northern Kansas and southwest to south‑central Nebraska with storms evolving into a QLCS, producing marginally severe hail and isolated damaging gusts as the hail and wind threat persisted into the night.
• WPC warned of slow-moving storms over central to western North Dakota overnight with 1–2 inch per hour rates and localized 2–4 inch totals, prompting an isolated flash‑flood risk through 12Z Monday.
• Across south‑central Nebraska into adjacent northwest Kansas, very slow storm motion and mergers supported 1.5–2 inch per hour rainfall and spotty 2–4 inch totals, with localized flash flooding possible despite drought‑affected, hydrophobic topsoils.
• Forecasters tied the multi-hazard setup to a mid/upper‑level trough with embedded vortices, steep midlevel lapse rates, high PW anomalies, and favorable shear that supported supercells, large hail, damaging wind, and training convection.