A grey, misty and windy day with periods of occasionally heavy rain. Strong to gale-force SE値y winds with the risk of severe gales for Shetland this afternoon. Gradually turning dry over Orkney tonight, the rain continuing across Shetland. Strong to gale force winds will slowly moderate.
Wednesday dull in Shetland, with further rain. Still a fresh SE値y wind in the north, but moderate to light elsewhere. Orkney drier for a time, but with more rain in the afternoon, with a light W or NW値y wind.
Mainly dry and much brighter on Thursday with light SW値y winds. Some light rain at times on Friday, but also drier, brighter interludes. Freshening SE値y winds later.
Probably rather cloudy over the weekend, but mainly dry with strong S to SE値y winds, Perhaps rather more unsettled with S to SE値y winds strengthening further and rain coming in from the west. Possibly less windy and mainly dry later with lighter winds.
GENERAL SITUATION AND SYNOPSIS 06:00 UTC 06/10/2015
With an anticyclone over Scandinavia and low pressure to the west a very strong SE値y airflow is established across northeast Scotland,
Fronts, blocked by high pressure to the east, will become slow-moving across the Northern Isles today and during Wednesday. However, the very strong SE値y airflow will ease and the fronts slowly weaken overnight as low pressure fills and drifts east over the south of the UK.
A ridge is expected to cross the area on Thursday.
Scandinavian high pressure is then expected to build west across the British Isles and forecast to persist during the weekend, but with a strengthening SE値y airflow.
The current prognosis suggests high pressure may weaken for a time next week, with an Atlantic depression driving fronts eastwards, bringing a strong and possibly unsettled S to SE値y airflow, this possibly easing later as the high reasserts itself.
FORECAST FOR NEXT THREE DAYS
Daytime temperatures 13ｰ or 14ｰ Celsius for Orkney and 12ｰ or 13ｰ Celsius for Shetland. Overnight lows 9ｰ or 10ｰ Celsius.
TUESDAY 6th: A grey, misty and windy day with periods of occasionally heavy rain for much of the time. F7 to gale F8 SE値y winds will increase to severe gale F9 over Shetland in the afternoon. Though it will gradually turn dry over Orkney during the night, the rain will continue across Shetland with some heavy bursts. The strong SE値y winds, with severe gales at first over Shetland will slowly ease F5-7.
Sea State: Becoming rough to very rough or high, with a 4 to 5 metre SE値y wind-swell.
WEDNESDAY 7th: Another dull day for Shetland, with further outbreaks of rain. The SE値y wind still a F5-6 in the north, but easing F4 S to SE値y elsewhere. Orkney is likely to be drier for a time, but with a chance of rain in the afternoon. Here winds are likely to be a light F3 W or NW値y.
Sea State: Rough or very rough, with 3 to 5 metre SE値y wind-swell. Later in waters around Orkney becoming moderate to rough, with a 2 to 3 metre SW値y wind-swell.
THURSDAY 8th: Mainly dry and much brighter with some sunshine and light F2-3 SW値y winds.
Sea State: Moderate to rough, with a 2 to 3 metre SE値y wind-swell turning S to SW値y.
TEN DAY OUTLOOK
Temperatures 13ｰ or 14ｰ Celsius by day. Overnight lows down to 9ｰ or 10ｰ Celsius.
FRIDAY 9th: Rather cloudy with a little patchy drizzle or a few light showers, but also drier, brighter interludes with the occasional sunny spell. Freshening S値y winds tending SE値y later.
Sea State: Mostly moderate, with a 2 metre S値y wind-swell.
SATURDAY 10th: Probably rather cloudy but mainly dry with strong SE値y winds.
Sea State: Perhaps slight to moderate becoming moderate, with a 1 to 2 metre SE値y wind-swell building 2 metres.
SUNDAY 11th - FRIDAY 16th: Probably rather cloudy, but mainly dry at first with strong S to SE値y winds, During the first part of the week perhaps becoming rather more unsettled with S to SE値y winds strengthening further and rain coming in from the west. Possibly less windy and mainly dry later with lighter winds.
Sea State Sunday: Possibly mostly moderate, with a 2 metre SE値y wind-swell.