Friday evening: A dry evening with some clear spells allowing a touch of frost. Then becoming cloudy overnight with heavy rain reaching western counties in the early hours crossing to the east by morning. Freshening southeasterly winds. Minimum temperature -1 °C.
Saturday: A cloudy and wet day with the heaviest rain likely across Antrim and Down, leading to some localised flooding. Perhaps becoming drier and brighter in Fermanagh. Rain clearing during evening. Maximum temperature 8 °C.
Outlook for Sunday to Tuesday: A frosty start Sunday, fog patches, then sunny spells, but turning wet and windy in evening. Blustery showers on Monday and Tuesday, wintry on hills.