A slight risk day typically will mean the threat exists for scattered severe weather, including scattered wind damage or severe hail and possibly some isolated tornadoes.
The severe weather outbreak also produced many reports of severe hail which caused $130 million in damage across several states.
Burbage in Leicestershire saw some of the most severe hail.
There were also 27 reports of severe wind damage and 66 reports of severe hail in the state.
West Virginia experienced 9 tornadoes, along with 4 severe wind damage reports and 14 reports of severe hail.
There were also 6 reports of damaging winds, and 21 reports of severe hail throughout the state.
On 28 February 2007, a severe thunderstorm known as a "supercell" passed over Canberra causing flash flooding, severe hail and property damage.
Such storms can feature strong surface winds and severe hail.
This is because there could be severe hail from a strong updraft that lasts only a short period of time.
Cousland's Flying Fortress encountered severe hail, damaging all the forward surfaces of the plane, and ice caused a temporary shutdown of one engine.