Otherwise, the post-frontal environment will exhibit notably steep lapse rates as a sharp upper trough slides NE from the Atlantic across the British Isles. Numerous showers, as a result of cold air aloft atop relatively warm SSTs, will be ongoing at the beginning of this forecast period over portions of Ireland, and will tend to become more widespread in coverage through the day across many areas - although very few in sheltered eastern parts. Lightning will be rather sporadic in nature, hence the broad LOW threat level issued, but a favourable overlap of instability phasing with peak diurnal heating suggests a better chance of showers becoming electrified across northern parts of Ireland into Northern Ireland on Sunday afternoon - hence a SLGT issued here.

The strongest cells will be capable of producing gusty winds and hail up to 1.5cm in diameter.