Weather Outlook for Orkney

Wednesday, August 20, at 11.18am

 

HEADLINES

TODAY: Windy with sunny spells and scattered showers.

TONIGHT: Chance of some rain. Lighter winds.

TOMORROW: Sunny spells and scattered showers. Light winds.

DAYS 3-5: Showers becoming less frequent as winds ease.

DAYS 6-10: Dry start to next week then more changeable.

 SUMMARY

Bright at times today with some occasionally heavy showers. Fresh to strong N to NW’ly winds easing. Shetland mainly dry and clear tonight with light NW’ly winds. Orkney cloudier with rain edging northwards later. Winds here becoming light and variable.

Any rain across Orkney on Thursday soon clearing. Then a bright day with a few showers, perhaps more frequent over Shetland later. Light to moderate N’ly winds.

Bright with scattered showers and fresh N’ly winds on Friday. Mostly dry and bright on Saturday with moderate to fresh N to NW’ly winds. Sunday dry and bright with sunny spells and light winds.

The first part of next week mainly dry and bright with light winds. Then becoming more changeable with some rain and freshening SE’ly winds. Possibly drier and brighter later with some showers as lighter winds turn S or SW’ly.

 GENERAL SITUATION AND SYNOPSIS 06:00 UTC

With low pressure over southern Scandinavia a strong and showery NW to N’ly airflow continues across the Northern Isles. This is expected to ease overnight as a shallow low moves east across the mainland of northern Scotland tonight. As it does so a front will be pushed north towards Orkney before being pulled away as the low continues east.

As pressure builds to the north a fresh N’ly airflow will return later on Thursday and persist through Friday.

A forecast ridge is expected to bring a settled weekend and first part of the following week. Low pressure predicted to develop to the west of the British Isles is likely to bring a changeable SE to S’ly airflow later. 

 

FORECAST FOR NEXT THREE DAYS

Confidence level: Weather type – medium/high. Timing – medium.

Daytime temperatures rising to between 12° and 14° Celsius. Overnight lows falling to around 8° Celsius.

WEDNESDAY 20th: Rather cloudy with some occasionally heavy showers but also sunny spells between. F5, locally F6, N to NW’ly winds easing through the day. A few showers this evening then Shetland mainly dry and clear overnight with F2-3 NW’ly winds. Across Orkney cloud will increase with rain edging northwards later. Winds here becoming variable F2-3.

Sea State: Mostly moderate, with a 2 metre NW or N’ly wind-swell.

THURSDAY 21st: Any rain across Orkney soon clearing away southwards. Then a bright day with some sunny spells and a few showers. These perhaps more frequent over Shetland later. F3-4 N’ly winds.

Sea State: Moderate to slight, with a 1 to 2 metre NW to N’ly wind-swell tending N to NE’ly later.

FRIDAY 22nd: Bright with sunny spells, scattered showers and fresh N’ly winds.

Sea State: Slight or moderate, with a 1 to 2 metre N’ly wind-swell.

 

 10-DAY OUTLOOK

Confidence level: Weather type – medium/low. Timing – low.

Daytime temperatures rising to 13° or 14° Celsius with overnight lows down to around 9° Celsius.

SATURDAY 23rd: Mostly dry and bright with moderate to fresh N to NW’ly winds.

Sea State: Slight to moderate, with a 1 to 2 metre N to NW’ly wind-swell.

SUNDAY 24th: Dry and bright with sunny spells and light NW’ly winds backing W’ly.

Sea State: Perhaps slight to moderate, with a 1 to 2 metre NW’ly wind-swell.

MONDAY 25th – SATURDAY 30th: The first part of the week mainly dry and bright with light winds. Then becoming more changeable with some rain and freshening SE’ly winds. Possibly drier and brighter later with some showers as lighter winds turn S or SW’ly.

Sea State on Monday: Possibly mostly slight, with a 1 metre or less SE’ly wind-swell.

 
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