WEATHER OUTLOOK FOR SHETLAND
Friday, 29th June 2012 at 12:26
HEADLINES
TODAY: FOG CLEARING, SHOWERS
TONIGHT: MOSTLY DRY, MISTY
TOMORROW: RAIN THEN SHOWERS
DAYS 3-5: RAIN OR SHOWERS, BECOMING BREEZY FOR A TIME
DAYS 6-10: LESS UNSETTLED
SUMMARY
Fog and low cloud across Shetland this morning clearing by the afternoon. Orkney brighter but with some occasionally heavy showers. Mainly light or moderate S to SE’ly winds. Tonight mostly dry with some clear spells, but some rain edging into Orkney later. Also becoming misty with fog patches. Light S or SW’ly winds.
Outbreaks of rain over Orkney soon spreading to Shetland on Saturday morning. The rain then turning more showery during the afternoon. Light mainly S’ly winds.
Cloudy with rain or showers on Sunday. Freshening NW’ly winds later. Mainly dry and bright on Monday with light winds. Cloudy on Tuesday with outbreaks of rain spreading from the southwest.
Perhaps cloudy with showers and a moderate SE to E’ly wind on Wednesday. The remainder of next week and the following weekend possibly becoming mainly dry and bright with moderate occasionally fresh NE’ly winds.
GENERAL SITUATION AND SYNOPSIS 06:00 UTC
A filling depression, presently to the west of the Hebrides but with a trough extending across the far north of Scotland, is expected to drift slowly northeast over the Northern Isles during the weekend. As it does so the mild and moist S to SE’ly airflow will be replaced by a short-lived strong, and cooler NW’ly airflow later on Sunday as the low moves away north along the Norwegian coast and pressure builds from the northwest.
By Monday a ridge of high pressure is forecast to have built across the Northern Isles as a European anticyclone links with a smaller one over Iceland.
This is likely to be short-lived, with the ridge soon collapsing as a depression moves slowly east towards the British Isles, bringing a freshening SE’ly airflow to northern Scotland on Tuesday. This low may continue northeast across the UK during the second part of next week, resulting in a mainly NE’ly airflow over the Northern Isles.
FORECAST FOR NEXT THREE DAYS
Confidence level: Weather type – medium/high. Timing – medium.
Daytime temperatures rising to 14° to 16° Celsius with overnight lows of about 10° Celsius.
FRIDAY 29th: Starting damp and foggy with some showers or longer periods of rain, these possibly heavy in the morning. The afternoon then brighter with a mixture of sunny spells and showers. F4 S to SE’ly winds becoming F2-3 S’ly. Showers becoming lighter and more isolated tonight, with some clear spells, but cloud and more outbreaks of rain may spread up from Orkney later. Also becoming misty with the likelihood of fog. F2-3 S or SW’ly winds.
Sea State: Moderate to rough at first, with a 2 to 3 metre E’ly wind-swell. Becoming mostly moderate, with a 2 metre S to SE’ly wind-swell.
SATURDAY 30th: Rather cloudy with outbreaks of rain extending north across Shetland. Perhaps some heavy rain overnight into Sunday. F2-3 mainly S’ly winds.
Sea State: Mostly moderate, with a 2 metre S or SW’ly wind-swell.
SUNDAY 1st: Cloudy with early rain, then becoming drier and brighter for a time with some sunshine. Heavy showers developing later as F2-4 SW’ly winds veer NW’ly and increase F5-6.
Sea State: Probably moderate, with a 2 metre NW’ly wind-swell.
10-DAY OUTLOOK
Confidence level: Weather type – medium. Timing – medium/low.
Temperatures 13° to 15° Celsius by day, with overnight lows about 9° Celsius.
MONDAY 2nd: Showers and fresh W or NW’ly winds at first, but becoming mainly dry and bright with sunny or clear spells and lighter winds.
Sea State: Perhaps slight to moderate, with a 1 to 2 metre NW’ly wind-swell.
TUESDAY 3rd: Cloudy with outbreaks of rain spreading from the south. Moderate SE to E’ly winds.
Sea State: Perhaps slight to moderate, with a 1 to 2 metre SE’ly wind-swell.
WEDNESDAY 4th – MONDAY 9th: Cloudy with showers and a moderate SE to E’ly wind at first. Perhaps becoming mainly dry and bright with moderate NE’ly winds and scattered showers. Winds possibly falling light by the weekend.
Sea State on Wednesday: Possibly slight to moderate, with a 1 to 2 metre SE to E’ly wind-swell.
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DISCLAIMER
Be aware that the weather over north-west Europe – and especially around the Northern Isles – is part of an ever-changing and dynamic system. Therefore regard the ’10-Day Outlook’ as a guide only – there are times when any outlook going beyond about 36 to 48 hours is likely to prove
unreliable.
Always check the latest forecast from the UK Met Office before undertaking any weather-dependent activity.
All forecasts are for planning purposes only.
Neither Dave Wheeler, nor any employee of Fair Isle Weather Services, accepts any liability for the accuracy of this forecast.
Dave Wheeler MBE FRMetS
Field
Fair Isle
Shetland, ZE2 9JU
Telephone: +44 (0)1595760224
Mobile: 07545822376
E-mail: dave@davewheelerphotography.com or dave.wheeler@fairisle.org.uk
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Originally posted here:
Weather Outlook for Shetland – Friday, 29th June 2012 at 12:26