Scattered showers will already be affecting parts of Ireland and the Irish Sea first thing on Friday morning, and are expected to develop fairly widely, organised into distinct bands at times. With cool air aloft atop warm seas and diurnal heating inland, this will yield 300-600 J/kg CAPE. Shear will tend to increase from the west during the afternoon hours, which combined will help organise convection at times. Sporadic lightning, small hail and gusty winds will be possible from the most intense cells. Given relatively low cloud bases and reasonable LLS, an isolated tornado is also possible.