Veering Shear Powers Supercells in Central SD Spreading to Northern NE — SevereWX

Thunderstorms are gaining steam across central South Dakota, where mid-level ascent is kicking in over the central and northern Plains. Morning clouds have cleared, sparking heating with temps in the 80s F and dewpoints in the upper 60s to 70s F. This combo is mixing up MLCAPE of 1000-2000 J/kg—plenty for storms to thrive.

Deep-layer shear of 20-30 knots, paired with veering wind profiles, sets the stage for supercell structures early on. Expect large hail up to 1.25 inches and damaging winds of 55-70 mph as the main threats. Later this afternoon into evening, storms could cluster, ramping up wind potential further.

SPC sees an 80% chance of a Severe Thunderstorm Watch to cover this stretch from central South Dakota into northern Nebraska through 8 PM CDT. Peak tornado intensity could hit 90 mph, but hail and gusts look most probable.

Keep an eye on radar as these storms evolve—stay prepared with a severe weather plan, monitor local NWS updates, and have a safe spot ready if warnings fire.