Met Eireann have issued a STATUS RED wind warning for Monday/Monday night for Galway, Mayo, Clare, Cork and Kerry. They are forecasting mean wind speeds in excess of 50 mph and wind gusts in excess of 80 mph over these areas. A STATUS ORANGE wind warning has been issued for the rest of the country, with wind speeds between 40-50mph and gusts between 68-80mph.
Such strong winds could produce structural damage, cause widespread power outages across Ireland and Northern Ireland and create travel disruption. Also the winds over the Atlantic will create large swell and waves, ECMWF model forecasting wave heights reaching 35 feet or 10m to the south Ireland on Monday evening. This will create dangerous marine conditions, with potential for coastal flooding and tidal flooding inland.
Ophelia will weaken and fill as it continues on its expected forecast track northeast up the western side of Ireland then up across northern Scotland during Tuesday morning.
However, for the UK, a spell of very windy weather is likely for the north and west and the Met Office have issued yellow wind warnings for Monday and Tuesday for northern and western areas in association with ex-Ophelia. Strongest winds on Monday evening/night with southerly wind gusts of between 55 and 65 mph across much of the warning area with the potential for gusts of 80 mph in coastal areas, particularly in Northern Ireland. The wind warning extending into Tuesday morning, though by then southwesterly wind gusts between 50 and 60 mph across much of the warning area with the potential for gusts of 70 mph across the Central Belt of Scotland and parts of Northeast England.
Rainfall shouldn't be so much an issue compared to the wind, though western Ireland and NW Scotland could see 24 hour totals in excess of 50mm (2 inches) by Tuesday morning.