A ‘yellow’ rain warning has been issued for East Tyrone and south Derry for Monday evening.
After weeks of dry weather and sunshine, more than 40mm of rain is forecast for the next few hours.
MET NI stated, “Heavy, thundery showers are expected to break out this afternoon over central and western parts of Northern Ireland and western parts of Wales. Whilst many will miss the worst, rain will be locally torrential, with the risk of hail. Please be aware of the risk of localised flooding.
“Warm, moist, unstable air from the continent will allow thunderstorms to develop as temperatures rise today, bringing the potential for 25 mm of rain in an hour, and the risk of more than 40 mm in a few hours.”