Cloud and patchy rain soon clearing this morning with sunny spells and a few showers for the afternoon. Moderate or fresh SW to W’ly winds increasing fresh to strong across Shetland. Mainly dry overnight with clear spells. Fresh SW to W’ly winds backing S’ly later.
Dry and bright at first on Thursday, but clouding over with arriving during the evening as S’ly winds increase to gale force. Rain and S’ly gale at first on Friday, then bright with scattered showers and strong SW’ly winds for the afternoon.
Saturday bright and drier with lighter SW’ly winds but rain and strong S’ly winds overnight and at first on Sunday.
Perhaps a drier start to the following week but with strong SE’ly winds. Winds possibly easing and backing SE to E’ly later.
06:00 UTC 01/10/2014
With pressure low across Iceland an unsettled SW’ly airflow covers northern Scotland. Fronts will clear early the Northern Isles early today, the airflow veering SW to W’ly as they do so.
The airflow is expected to back S’ly and again increase very strong later on Thursday as a depression, expected to deepen to the south of Iceland, drives its fronts eastwards. These fronts are forecast to clear the Northern Isles early on Friday, the airflow then easing and veering SW’ly.
The present prognosis suggests this latest depression may drift south to become a slow-moving gradually filling feature to the west of the British Isles. As it does so a SE’ly airflow is expected to strengthen later in the weekend and persist for the first part of next week before backing E’ly and easing later.
FORECAST FOR NEXT THREE DAYS
Temperatures rising to around 14° Celsius by day with overnight lows falling to about 10° Celsius.
WEDNESDAY 1st: Cloud and outbreaks of rain clearing during the morning then brightening up with sunny spells, but also a few showers for the afternoon, mainly across Shetland and Fair Isle. F4-5 SW to W’ly winds increasing F5 across Shetland later, perhaps locally F6. Showers dying out during the evening then mainly dry overnight, with long clear spells developing. F5 SW to W’ly winds, still F6 locally for a time over Shetland, backing S’ly later.
Sea State: Moderate to rough, with a 2 to 4 metre SW’ly wind-swell. Highest in the west.
THURSDAY 2nd: Dry and bright with sunny spells at first, but clouding over through the afternoon, with rain spreading from the west during the evening as F4-5 S’ly winds increase F7 to gale F8. Rain and strong to gale-force winds overnight.
Sea State: Moderate to rough in the east, with a 2 to 3 metre S’ly wind-swell. Rough to very rough in the west, with a 4 to 5 metre S’ly wind-swell.
FRIDAY 3rd: Rain and S’ly gale at first, then sunshine and scattered showers with F6 SW’ly winds for the afternoon.
Sea State: Rough to very rough in the west, with a 4 to 5 metre S to SW’ly wind-swell. In the east rough, with a 3 to 4 metre S to SW’ly wind-swell.
TEN DAY OUTLOOK
Temperatures around 14° Celsius by day down to about 9° Celsius overnight.
SATURDAY 4th: Bright with showers and lighter SW’ly winds but rain and strong S’ly winds overnight.
Sea State: Moderate to rough, with a 2 to 3 metre SW’ly wind-swell turning S’ly.
SUNDAY 5th: Mainly cloudy with patchy rain or showers at first becoming drier later. Strong S’ly winds.
Sea State: Perhaps rough, with a 3 to 4 metre S’ly wind-swell.
MONDAY 6th – SATURDAY 11th: Perhaps cloudy with outbreaks of rain and strong to locally gale-force SE’ly winds for the start of the week. Possibly becoming drier and brighter later as easing winds back SE to E’ly.
Sea State on Monday: Possibly rough, with a 3 to 4 metre S to SE’ly wind-swell.