Cool this afternoon in Ulster with scattered showers, some heavy and of hail and some thundery, but bright or sunny spells also. Southwesterly winds will be moderate to fresh and occasionally gusty generally but strong and gusty at times on some western coasts. Highs today of 8 to 10 Celsius. In the early evening a narrow band of rain will spread into Donegal, the rain heavy and possibly thundery in places but somewhat clearer weather with showers will follow into Donegal during the evening and winds there will become light to moderate westerly. Highest temperatures of 8 to 10 degrees.
The rain will spread eastwards across the remainder of the province during the late evening and early night, still heavy and possibly thundery in places, but drier weather with scattered showers will follow and reach eastern coasts after midnight. Lowest temperatures of 1 to 4 degrees, with some frost forming in sheltered inland areas. Winds will become light to moderate west to southwesterly everywhere.
Tomorrow, Wednesday, will be cool with scattered showers, some of the showers heavy and of hail and some will be thundery. Some sunny spells too though. Highest temperatures of 8 to 11 degrees. Moderate to fresh and gusty west to southwest wind will back southwesterly and then increase strong and gusty in exposed western parts later in the day.