Met Office

Extended outlook

2000 UTC Sunday 16 December to 2000 UTC Wednesday 19 December 2018

Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 142045 UTC

Cullercoats

On Sunday evening a small low, lies to the north of the Faeroes, moves north and fills. Elsewhere, a complex low pressure system lies in the mid-Atlantic, southwest of Iceland, and high pressure lies across the east of Scandinavia. By midday on Monday, the low has deepened to 956 and becomes slow moving in the East Northern Section, with the associated frontal system moving east towards the UK. There is potential for transient lows to develop along this front, and move northeast. On Wednesday the main deep low pressure system in the mid-Atlantic is expected to move east, towards the northwest of the UK, filling slightly. Strong or near gale force winds are likely across the north of Cullercoats on Sunday and Monday. On Monday night near gale force winds will spread east across the region, with gales possible in the north. Further gales or near gales are possible on Tuesday, before winds gradually ease from the west overnight

Niton

On Sunday evening a complex low pressure system lies in the mid-Atlantic, southwest of Iceland, and high pressure lies across the south of Spain. Overnight the low will deepen, and by midday on Monday a low of 956 is expected to lie in the East Northern Section. Overnight into Tuesday, the high pressure is likely to decline eastwards, as associated frontal systems move east towards the UK. There is potential for transient lows to develop along this front, and move northeast. On Wednesday the main deep low pressure system in the mid-Atlantic is expected to move east, towards the northwest of the UK, filling slightly. On Sunday night into Monday morning Gales or near gales will spread into the northwest of Niton. Gale or near gale force winds will spread east across Niton through the rest of Monday, easing from the west later on Tuesday. Further strong or near gale force winds are possible on Wednesday

Portpatrick

On Sunday evening a low, to the north of the Faeroes, moves north and fills. There is also a deepening complex low pressure system in the mid-Atlantic. By midday on Monday, the low has deepened to 956 and lies in the East Northern Section. Through Monday and Tuesday the low is slow moving and remains in the Mid-Atlantic, with the associated frontal system moving east towards the UK. There is potential for transient lows to develop along this front, and move north east. On Wednesday the main deep low pressure system is expected to move east, towards the northwest of the UK, filling slightly. Gales or near gale force winds are expected to spread into Shannon and Rockall on Sunday night and then spread northeast across the rest of Portpatrick through Monday. Winds generally easing on Tuesday but remaining near gale across Fair Isle on Tuesday, easing later. Further strong or near gale force winds are possible on Wednesday