Y Tywydd Rhagolwg Estynedig
Mae'r cynnwys hwn ar gael yn Saesneg yn unig.
Extended Outlooks 1800 UTC Fri 12 Feb to 1800 UTC Mon 15 Feb Issued by the Met Office, on behalf of the Maritime and Coastguard Agency, at 102300 UTC
On Friday evening a cyclonic flow with frontal troughs will cover much of the Niton area. Depression then expected to transfer east through the north of the area during Saturday, with a further depression near the far northwest by midnight Sunday. During Sunday, this low is forecast to transfer southeast into Biscay, with pressure rising in the far west. Current expectations are then for pressure to continue to rise from the west across the forecast area through Monday. Strong to gale force winds in the far southwest on Friday evening will become more widespread in the west of the area on Saturday and extend east into the central English Channel for a time. Winds then expected to increase to severe gale at times in the west overnight Sunday and during Monday, possibly storm force for a time in the far northwest. Current expectations are then for strong to gale force winds to persist through much of Monday west of 2WGo to top of page
On Friday evening a ridge of high pressure will extend south over the far north of the Cullercoats area with a cyclonic flow elsewhere. A depression is then expected to transfer east through the south of the area during Saturday, this then likely to become slow moving over Denmark during Sunday as a ridge builds in the far west of the Cullercoats area. Current expectations are then for little change through Monday, with pressure continuing to build from the west, but with low pressure being maintained over Denmark and northern Germany. Strong to gale force winds will extend southwest across the far northwest of the area early on Saturday, these expected to persist through Sunday and extend further east and south over the southern North Sea. Current expectations are then for strong to gale force winds to become more widespread over the North Sea during MondayGo to top of page
Portpatrick On Friday evening a ridge of high pressure will extend southwest across the far north of the Portpatrick area, with low pressure in the south maintaining a cyclonic flow elsewhere. High pressure then expected to build more generally in the north during Saturday, with low pressure persisting in the south. The low is then forecast to transfer southeast into Biscay on Sunday as pressure builds across the area from the west, and current expectations are for a strong ridge to extend northeast across the west of the area on Monday. Strong to gale force winds north of 54N on Friday evening, becoming widespread across much of the area south of 62N on Saturday. Winds may reach severe gale or storm force in the far southwest for a time on Sunday morning but moderate in the northwest during the day. Gales are then currently forecast to continue moderating from the northwest across all parts during MondayGo to top of page
Last Updated at 22:37 UTC on Wednesday 10 February