A rare tornado warning has been issued for parts of the UK and Ireland. As we begin a week in which unsettling weather has been forecast throughout the country, the Tornado and Storm Research Organisation (TORRO) has cautioned that 'severe thunderstorms' could be on the way.
TORRO defines a severe thunderstorm as producing one or more of the following:
- one or more tornadoes and / or waterspouts
- hail with diameter of at least 20mm
- non-tornadic winds gusting to 55 mph or more at surface (but which are not part of synoptic-scale straight-line winds of such velocities)