Sunday
A developing low approaches from the southwest. Heavy rain setting in quickly in the morning for southwestern Britain and southern Ireland, extending north and eastwards, reaching northern England by early afternoon with snow on the hills. Heavy rain develops for Northern Ireland. Easternmost England stays dry until mid afternoon, early sun weakening as cloud thickens. Heavy squally showers follow into the southwest, risk hail and thunder. Rain and hill snow moves into southern Scotland, reaching the central belt late afternoon. Northern Scotland stay dry throughout daylight. Winds strengthening to become gales near coasts in the south and west. Chilly in the north at 3 to 5C, becoming milder south at 7 to 9C.

Sunday night
Another spell of heavy rain moves in quickly from the southwest later in the evening, pushing up through the Midlands and Wales, into east and northern England through the night, some hill snow over the higher Pennines and later Scottish Borders and southeast Highlands. Dry toward northwest Scotland. Squally showers with hail and thunder follow again into coastal areas in the south and west during the night. Becoming dry in central and eastern England with clearing skies before dawn. Windy for many, varied locally, but gales near coasts and hills toward south and west. Local frost in northern Scotland. Lows 2 to 6C, mildest southeast.

Monday
A deep centre of low pressure over Ireland drifts slowly northeastwards. Frequent or persistent heavy rain in the west and south, risk of hail, thunder and sudden squally winds. Drier and brighter for eastern England. Some rain and hill snow in northeast Scotland, drier for central and western Scotland. Slow-moving areas of showery rain over Ireland. Windy across England, Wales and south coast of Ireland, gales near coasts and over hills. Less windy for Scotland. Highs 4 to 8C, mildest south.

Tuesday
Low pressure centred toward the northeast brings a showery and chilly northwesterly wind across England, Wales and much of Ireland. Heavy rain and hail at times, locally frequent. Drier and brighter toward the south of England, but some showers for a time in the morning in the southeast. Showery for Scotland with hill snow most frequent in the north, drier toward the central belt. Highs 4 to 8C, but feeling colder in brisk winds.