Clustering Supercells Set to Hammer Central SD into Northern NE — SevereWX

Thunderstorms are firing up across central South Dakota amid rising mid-level ascent and heating behind morning clouds. With temperatures climbing into the 80s F and dewpoints in the upper 60s to 70s F, moderate instability (MLCAPE 1000-2000 J/kg) pairs with 20-30 kt deep-layer shear and veering winds to favor supercell structures.

Initial storms could pack large hail up to 1.25 inches and damaging gusts of 55-70 mph, with a lower-end tornado risk up to 90 mph. As the afternoon progresses, models indicate clustering, heightening the damaging wind threat into evening hours over northern Nebraska.

SPC's Mesoscale Discussion 1802 flags an 80% chance of a Severe Thunderstorm Watch this afternoon (valid through 8 PM CDT) for central SD into northern NE. This setup builds on ongoing Plains activity, but expect focused severe potential here.

Peak Threats:

Stay alert if you're in the path—monitor radar and have a severe weather plan ready. Know your safe spot, charge devices, and heed local warnings to stay safe.