Mostly dry today with sunshine turning hazy later as high cloud invades from the west. Moderate W’ly winds occasionally fresh across Shetland. Dry tonight with cloud thickening across Shetland where freshening SW’ly winds will become strong.
Dry on Tuesday across Orkney and Fair Isle with the possibility of a few spots of rain in Shetland. Fresh SW’ly winds easing over Orkney.
Wednesday dry and bright with light SW’ly winds across Orkney but moderate to fresh over Shetland. Cloudier on Thursday with some patchy mostly light rain for a time. Strong SW’ly winds with chance of gales in Shetland. Perhaps mainly dry and bright for much of Friday with SW’ly winds easing for a time but perhaps becoming wet and windy overnight.
An unsettled weekend with rain or showers and strong SW’ly winds, then possibly turning colder with wintry showers as strong to gale SW’ly winds veer W or NW’ly.
06:00 UTC 10/03/2014
Currently an anticyclone lies across the British Isles. This will drift east tonight to be over the North Sea by Tuesday, bringing a freshening SW’ly airflow across the Northern Isles.
Little change is expected on Wednesday, though the high is expected to move away into the near-Continent during Thursday, allowing a cold front to edge in from the west across northern Scotland.
A fresh SW’ly airflow is likely to persist during the latter part of the week as an extension of the Azores anticyclone transfers northeast over the south of the UK.
The high is forecast to drift away into the Continent over the weekend. As it does so low pressure, moving through the Iceland region, may well bring a strengthening and unsettled SW’ly airflow over northern Scotland, this turning to a colder NW’ly early the following week as low pressure continues eastwards and pressure builds to the west.
FORECAST FOR NEXT THREE DAYS
Confidence level: Confidence level: Weather type – medium/high. Timing – medium.
Temperatures rising to around 8° Celsius by day, falling to about 4° Celsius overnight.
MONDAY 10th: Though still the outside chance of an odd shower at first, the day will be dry with some sunshine. This will turn hazy through the afternoon as thin high cloud invades from the west. F4 W’ly winds occasionally F5 across Shetland. Staying dry this evening and overnight with some clear spells for Orkney while cloud thickens across Shetland. SW’ly winds freshening F5 over Orkney and F6 across Shetland later.
Sea State: Rough to very rough becoming moderate to rough, with a 3 to 5 metre W’ly wind-swell decaying 2 to 4 metres and turning SW’ly. Highest in the west.
TUESDAY 11th: Dry across Orkney and Fair Isle with some brightness developing later. Shetland cloudier with the possibility of a few spots of rain. F5 SW’ly winds easing F3-4 over Orkney.
Sea State: Perhaps moderate to rough, with a 2 to 4 metre SW’ly wind-swell. Highest in the west.
WEDNESDAY 12th: Dry and bright with sunny or clear spells, the best of these across the east of Orkney, more sheltered from the SW’ly wind, F2-4 across Orkney but F4-5 over the west and north of Shetland.
Sea State: Possibly moderate to rough, with a 2 to 4 metre SW’ly wind-swell. Highest in the west.
TEN DAY OUTLOOK
Confidence level: Weather type – medium/low. Timing – low.
Temperatures in the daily range about 8° Celsius down to around 4° Celsius at first, but several degrees colder after the weekend.
THURSDAY 13th: Cloudier with some patchy mostly light rain for a time in the afternoon. SW’ly winds increasing strong, with chance of gales across Shetland.
Sea State: Moderate to rough, with a 2 to 3 metre SW’ly wind-swell. Highest in the west.
FRIDAY 14th: Perhaps mainly dry and bright for much of the day with SW’ly winds easing moderate to fresh before freshening SE’ly as it turns wet and windy overnight.
Sea State: Perhaps moderate to rough, with a 2 to 3 metre SW’ly wind-swell. Highest in the west.
SATURDAY 15th – THURSDAY 20th: Unsettled on Saturday with rain clearing to showers as strong SW’ly winds veer W’ly. Becoming drier and brighter later as winds east. Perhaps a dry bright start on Sunday then a return to wet and windy weather by Monday and then possibly turning colder with wintry showers as strong to gale SW’ly winds veer W or NW’ly.
Sea State Saturday: Possibly rough to very rough becoming moderate to rough, with a 3 to 5 metre W to NW’ly wind-swell turning SW’ly and easing 2 to 4 metres. Highest in the west.