The post-frontal environment on Monday night is then characterised by cold air advecting across relatively warm seas. This will generate a few hundred J/kg CAPE, with numerous wintry showers developing over open seas and then pushed inland by both strong northwesterly steering flow and also embedded troughs in the flow aiding greater organisation. Despite limited instability, the strongly-sheared environment on the rear side of the upper trough (particularly over Ireland) should aid in some organisations of cells to produce sporadic lightning, gusty winds and small hail (amongst pre-existing rain, sleet and snow).