A soggy and possibly snowy Valentine's Day weekend is on tap for folks across the South and Northeast, forecasters said.

Tornado sirens blared over Bloomington, Indiana, on the evening of Feb. 19 as a tornado-warned storm bore down on the city.

This storm had everything at once—nonstop lightning, baseball-sized hail, and a tornado warning all happening together. An intense reminder of just how powerful and unpredictable nature can be.