© Niall Carson/PAWaves in Dublin Bay as storms batter Ireland and the UK.
The biggest wave ever to hit Irish shores - 20.4 metres (67ft) high - has been recorded, meteorologists have revealed.
The wave was measured at a special buoy off the Donegal coast on Tuesday as a force ten storm raged.
Meteorologists at Met Eireann said the data, sent from about 60 miles from the Irish coast, provided evidence of the most severe weather conditions it has encountered that distance offshore.
"At 14.00 today the M4 weather buoy off the Donegal coast recorded a maximum wave height of 20.4 metres which is the highest maximum wave recorded in Irish waters," Met Eireann reported.
At Malin Head, the most northerly tip of Ireland, wind gusting to 87mph (140km/h) was recorded.
Elsewhere, the Irish coastguard has urged people to stay off exposed coasts, cliffs, piers, harbour walls, beaches and promenades during this week's forecast stormy weather.
Comment: The following links may put this information into perspective.
Forget About Global Warming: We're One Step From Extinction!
Fire and Ice: The Day After Tomorrow