India, Sept. 19 -- A fast-moving and aggressive severe storm system swept across northern Utah, triggering urgent tornado warnings and blanketing parts of Davis County and the Wasatch Front with destructive, ping-pong-sized hail.

The sudden atmospheric destabilisation caught motorists and residents off guard, forcing emergency management officials to issue immediate shelter-in-place directives as rotating supercells tracked across densely populated corridors.

The National Weather Service issued successive emergency alerts as radar signatures detected prominent rotation within the storm clouds. Forecasters noted that the convergence of moist air masses and intense daytime heating created optimal conditions for violent convective activity...