Updated: Tuesday, April 22, at 11.05am
TODAY: Dry and bright.
TONIGHT: Rain. Becoming misty.
TOMORROW: Outbreaks of rain. Misty. Becoming windy.
DAYS 3-5: Some brightness but mostly cloudy with rain at times. Strong wind easing later.
DAYS 6-10: Perhaps mostly dry and bright. Windy for a time.
A mainly dry and bright day for Orkney, though rather cloudy at first over Shetland. Fresh E to NE’ly winds. Cloud increasing generally later with some rain arriving later in the evening. Turning misty overnight with outbreaks of rain, hill fog and some coastal fog in the east. E’ly winds veering SE’ly and increasing fresh to strong.
Cloudy on Wednesday with outbreaks of mostly light rain. Misty with extensive low cloud. Strong SE’ly winds.
Some early drizzle, mist and hill fog otherwise Thursday mainly dry and bright with fresh SE’ly winds. Cloudy on Friday with some rain. SE’ly winds easing moderate or light. Dry and bright start on Saturday but with rain later. Sunday drier and brighter after early rain. Light to moderate E’ly winds over the weekend.
Monday and Tuesday perhaps manly dry and bright with light E’ly winds. The middle part of next week perhaps bright with showers and cooler as strengthening NE’ly winds back N’ly. The end of the week and following weekend possibly mainly dry and bright with light N’ly winds and risk of overnight frosts.
GENERAL SITUATION AND SYNOPSIS 06:00 UTC
With high pressure to the north and shallow low pressure over the south of the UK an E to NE’ly airflow is established across the north of Scotland.
During the next few days low pressure in the south is expected to fill, with the main focus of low pressure re-locating west into the Atlantic the airflow over the northeast of Scotland will become E to SE’ly, with weak fronts expected to affect the area from midweek.
Forecasts suggest that next weekend a depression will move from Biscay across the UK into the North Sea. As it does so a strengthening E’ly airflow across the Northern Isles will back E to NE’ly.
Current predictions suggest low pressure to the east of the UK will gradually transfer northeast into Scandinavia during the course of next week, with a strengthening NE’ly airflow over the Northern Isles backing N’ly in the process. A ridge of high pressure may move east over Scotland at the very end of the Outlook period.
FORECAST FOR NEXT THREE DAYS
Confidence level: Weather type – medium/high. Timing – medium.
Temperatures rising to around 10° Celsius by day along eastern coasts, 11° to 13° Celsius in the sheltered west. Down to about 6° Celsius overnight.
TUESDAY 22nd: A dry bright day with sunny spells across Orkney. Patchy low cloud over Shetland during the morning will clear to leave sunny spells by the afternoon. At the same time cloud will spread in across Orkney, this then extending into Shetland by the evening. F5-6 E to NE’ly winds. Some rain spreading in from the southeast later in the evening, this probably turning heavy for a while. Turning misty overnight with hill fog and some coastal fog in the east. F5-6 E’ly winds veering SE’ly and increasing F5-7 overnight.
Sea State: Mainly moderate, with a 2 metre E to NE’ly wind-swell.
WEDNESDAY 23rd: Cloudy with some patchy mostly light rain, this possibly mainly across Fair Isle and the south of Shetland. Misty with extensive low cloud. F6-7 SE’ly winds.
Sea State: Moderate to rough, with a 2 to 3 metre SE to E’ly wind-swell.
THURSDAY 24th: Mostly cloudy with some early drizzle, mist and hill fog but soon becoming mainly dry. SE’ly winds easing F5. Rain into Orkney during the evening and Shetland overnight.
Sea State: Moderate to rough, with a 2 to 3 metre SE’ly wind-swell.
Confidence level: Weather type – medium/low. Timing – low.
Temperatures 10° to 12° Celsius by day down to around 6° Celsius overnight.
FRIDAY 25th: Cloudy with patchy rain becoming more persistent for a time. Fresh SE to E’ly winds easing moderate or light.
Sea State: Perhaps mainly moderate, with a 2 metre SE to E’ly wind-swell.
SATURDAY 26th: Dry and bright start but rain soon arriving, this perhaps locally heavy for a time. Light SE to E’ly winds.
Sea State: Perhaps slight to moderate, with a 1 to 2 metre SE to E’ly wind-swell.
SUNDAY 27th – FRIDAY 2nd: Rain clearing on Sunday. Light to moderate SE to E’ly winds. Monday and Tuesday are expected to be manly dry and bright with light E’ly winds. The middle part of next week perhaps bright with showers and cooler as strengthening NE’ly winds back N’ly. The end of the week and following weekend possibly mainly dry and bright with light N’ly winds and risk of overnight frosts.
Sea State Sunday: Possibly slight to moderate, with a 1 to 2 metre SE to E’ly wind-swell.