Weather Outlook for Orkney

Wednesday, July 23, at 11.27am

 

HEADLINES

TODAY: Warm sunshine developing in the west. Mist and fog persisting in the cooler east. Light winds.

TONIGHT: Dry with light winds. Fog and low cloud extensive.

TOMORROW: Very warm and sunny in west. East cooler with extensive haar. Light winds.

DAYS 3-5: Initially warm and dry. Mist and fog in the east. Light winds. Cooler with some rain later.

DAYS 6-10: Mostly dry. Risk of mist and fog. Fresher winds midweek with chance of rain.

SUMMARY

Extensive low cloud mist and fog today will persist across much of the area today. However parts of the west of Orkney and also western Shetland should see breaks and here it will be very warm as sunny spells develop. Light to moderate SE’ly winds keeping the misty east cooler. The low cloud and haar in the east spreading to the west overnight. Southern parts of Orkney perhaps clearer towards morning.

On Thursday becoming very warm towards western coasts as sunny spells develop. Cooler elsewhere as mist, low cloud and fog persists. A light SE’ly breeze.

Friday and Saturday dry with occasional bright and sunny spells, particularly on the west-side where it will be very warm. Low cloud, mist and fog elsewhere. Light SE’ly winds tending W’ly later. Sunday rather cloudy with outbreaks of rain and light W’ly winds.

The first half of next week perhaps less settled and more changeable with some rain or showers and fresher SW to W’ly winds. The latter part and following weekend possibly mostly dry and settled again with light winds and the risk of haar.

GENERAL SITUATION AND SYNOPSIS 06:00 UTC

With high pressure centred northeast of Shetland a warm, moist and light SE’ly airflow covers northeast Scotland.

Little change is expected during the course of this week. During the coming weekend a ridge of high pressure is forecast to strengthen from the southwest, introducing a cooler W’ly airflow as a weak front trails eastwards over the Northern Isles.

High pressure is predicted to persist across the area through much of next week. However, for a time midweek falling pressure between Scotland and Iceland could introduce a fresher and less settled W’ly airflow over the Northern Isles.

 

 

FORECAST FOR NEXT THREE DAYS

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

Daytime temperatures rising to 15° or 16° Celsius in the mist, 17° to 19° Celsius in the sunshine and in a few favoured spots in the west perhaps 20° Celsius to possibly 23° Celsius. Overnight lows falling to 12° or 13° Celsius. 

WEDNESDAY 23rd: Extensive low cloud mist and fog will persist for much of the time in Orkney and over the east of Shetland. However, parts of the west Orkney mainland and Hoy and also western Shetland are likely to see breaks and here it will be very warm as sunny spells develop. F2-4 SE’ly winds. Some sunshine at first towards western coasts before the low cloud and haar spreads in from the east overnight. Towards morning this may clear from southern parts of Orkney.

Sea State: Smooth or slight, with a 1 metre or less SE to E’ly wind-swell. 

THURSDAY 24th: The mist, low cloud and fog should gradually burn back towards southern and eastern coasts, leaving the west very warm as sunny spells develop. Cooler where the haar persists. F2-3 SE’ly breeze.

Sea State: Smooth to slight, with a 1 metre or less SE to E’ly wind-swell.

FRIDAY 25tht:  Low cloud, mist and fog at times. Occasional bright and sunny spells, particularly on the west-side where it will be very warm. F2-3 SE’ly winds

Sea State: Smooth or slight, with a 1 metre or less SE’ly wind-swell.

 

 

10-DAY OUTLOOK

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

Daytime temperatures rising to 17° to 19° Celsius but perhaps a degree or so cooler on Sunday and again midweek. Overnight lows falling to around 12° Celsius.

SATURDAY 26th: Mainly dry with low cloud, mist and fog at times. Occasional bright and sunny spells, particularly on the west-side at first where it will be very warm. Light SE’ly winds tending W’ly later. Perhaps some rain during the evening and overnight.

Sea State: Smooth or slight, with a 1 metre or less SE’ly wind-swell turning W’ly later. 

SUNDAY 27th: A cooler and rather cloudy day with outbreaks of rain and light W’ly winds.

Sea State: Perhaps smooth or slight, with a 1 metre or less W’ly wind-swell.

MONDAY 28th – SATURDAY 2nd: Monday perhaps cloudy with some rain and light to moderate S to SW’ly winds. Tuesday drier and brighter with moderate SW’ly winds. The midweek period perhaps changeable with some rain or showers and fresher SW to W’ly winds. The latter part and into the weekend possibly mostly dry and settled again with light winds and the risk of haar.

Sea State on Monday: Possibly slight to moderate, with a 1 to 2 metre SW’ly wind-swell. Highest in the west.

 
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