Y Tywydd Rhagolwg Estynedig
Mae'r cynnwys hwn ar gael yn Saesneg yn unig.
Extended Outlooks 1800 UTC Fri 01 Jul to 1800 UTC Mon 04 Jul Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 292300 UTC
On Friday evening a ridge of high pressure will extend east across Iberia and southern France, with low pressure centred to the north of the British Isles maintaining a cyclonic flow in the north of the Niton area. Little change in the general synoptic situation across the forecast area is expected through to late Sunday with lower pressure and a cyclonic flow persisting in the north and ridge conditions being maintained in the south, and into continental Europe. However lower pressure is expected to slowly develop across Iberia, during Saturday, Sunday and Monday. A low pressure centre 1011 is then expected across central Spain by Monday evening. Strong winds are expected during Friday evening, north of 48N, with gales possible through Shannon and Fastnet. The development of the lower pressure across Iberia during Saturday, Sunday and Monday may also bring strong winds to the far south of sea area FitzroyGo to top of page
A low pressure system will be centred 993 to the northwest of the UK, on Friday evening, with High pressure across eastern and central Europe. The Azores high will also extend into southwestern Europe. The low will then transfer slowly north and east as a filling feature during Saturday, and is then expected to move north into the Norwegian Basin by midnight Sunday. On Sunday, a ridge of high pressure will build across France and Germany, whilst low pressure will persist across Scandinavia. This continues on Monday, although a shallow low pressure centre 1011 could move eastwards across the UK during the day, and into the North Sea by the evening. No gales are currently expected in the Cullercoats area through the forecast period but winds are expected to become strong at times in the central North Sea later on Saturday and through SundayGo to top of page
A low pressure system will be centred 993 in Faroes, on Friday evening, with High pressure across eastern and central Europe. The low will then transfer slowly north and east as a filling feature during Saturday, clearing into the Norwegian Basin by midnight Sunday. Little change to the synoptic pattern is expected through Saturday, with a further low forecast to be centred 1005 south of Iceland by midnight Saturday. This persisting through Sunday whilst a weak ridge may develop for a time in the southeast of the forecast area. This continues on Monday, although a shallow low pressure centre 1011 will move eastwards across the UK during the day, and into the North Sea by the evening. Strong Winds are expected south of 58N during Friday evening and overnight into Saturday, mainly through Rockall and Malin. Winds then expected to moderate from the west during Saturday morning, with no further strong winds expected until Monday eveningGo to top of page
Last Updated at 23:41 UTC on Wednesday 29 June