Weather Forecast

Friday, January 30, 2015


 


 

HEADLINES

TODAY: Showers turning wintry as cold winds strengthen.

TONIGHT: Very windy, especially across Orkney. Wintry showers.

TOMORROW: Turning colder with frequent sleet or snow showers. Very windy.

DAYS 3-5: Feeling bitterly cold in strong to gale-force winds. Frequent snow showers giving further accumulations.

DAYS 6-10: Becoming less windy with fewer showers. Risk of frosts. Possibly milder and unsettled later.

 

SUMMARY

Bright today between showers, some heavy with hail and the chance of thunder. Showers turning wintrier as winds veer N’ly and strengthen near-gale by evening. Very windy tonight with further wintry showers and N’ly gales, these severe across Orkney.

Showers turning increasingly to snow at low levels on Saturday. Moderate or heavy accumulations possible. Feeling bitterly cold in the N’ly gales, these severe at first over Orkney. Cold on Sunday with frequent snow showers, giving falls in places, with some drifting of lying snow across higher ground in strong to gale force N’ly winds.

Bright intervals on Monday and Tuesday but remaining bitterly cold with strong to gale force N’ly winds and further sleet or snow showers, these perhaps giving moderate or heavy falls in places.

Winds then easing with rest of the week perhaps mainly cold and bright with scattered wintry showers, mostly moderate or light N’ly winds and overnight frosts. However, by the weekend possibly less cold and more unsettled with rain or showers and strong SW to W’ly winds.

 

GENERAL SITUATION AND SYNOPSIS 06:00 UTC

With a deep low remaining slow-moving off the Norwegian coast less cold air contained within it is being drawn closer to Shetland today. With the low centre perhaps extending westwards a little the airflow may slacken for a time over Shetland while remaining strong over Orkney.

By the weekend, with the depression expected to slip southeast over southern Scandinavia, an Arctic N’ly airflow will have developed down over northern Scotland and eventually most of the British Isles.

The current forecast suggests the filling low will move away into the near-Continent, leaving a N’ly airflow over the Northern Isles. This situation may last until the Arctic airflow is cut off later next week as a ridge swings east. The prognosis for the following weekend suggests a milder, unsettled period as a depression tracks east from Iceland.

 

FORECAST FOR NEXT THREE DAYS

Less cold today with a high of around 6° Celsius and a low of 4° Celsius, otherwise cold with a daytime high of 4° or 5° down to a low of around 2° Celsius overnight and in wintry showers.

FRIDAY 30th: After a relatively mild start it will turn colder. There will be some sunny spells but also showers, some of these heavy with hail and the chance of thunder. Later, as F4-5 winds veer N’ly and strengthen F6-7 locally gale F8 by evening, showers will turn wintrier and fall as snow over the higher hills. Clear intervals and frequent showers this evening, these heavy with hail or sleet at times with snow on the hills. A very windy night with N’ly gales becoming severe across Orkney.

Sea State: Rough to very rough at first, with a 3 to 5 metre N’ly wind-swell. Becoming very rough to high, with a 5 to 8 metre N’ly wind-swell. Highest in the west and north.

SATURDAY 31st: A colder day with showers turning increasingly to snow at low levels. Feeling bitterly cold in the F7 to gale F8 N’ly winds, severe gale F9 at first over Orkney. N’ly winds perhaps easing and turning NE’ly for a time over Shetland, but then strengthening F6-7 N’ly through the afternoon and touching gale F8 by evening.

Sea State: Rough to very rough, with a 4 to 7 metre N’ly wind-swell. Highest in the west and north.

SUNDAY 1st: Cold with frequent snow showers, giving moderate or heavy falls in places, with some drifting of lying snow across higher ground in F7 to gale F8 N’ly winds.

Sea State: Rough to very rough, with a 3 to 6 metre N’ly wind-swell. Highest in the west and north.

 

10-DAY OUTLOOK

Cold at first with temperatures in the daily range 5° Celsius down to near-freezing in snow showers and overnight. Milder later.

MONDAY 2nd: Remaining bitterly cold with strong to gale-force N’ly winds and further sleet or snow showers, these perhaps giving moderate or heavy falls in places.

Sea State: Rough, with a 3 to 4 metre N’ly wind-swell.

TUESDAY 3rd: Further wintry showers accompanied by strong to gale-force N’ly winds.

Sea State: Perhaps rough to very rough, with a 3 to 5 metre N’ly wind-swell.

WEDNESDAY 4th – MONDAY 9th: Wintry showers dying out on Wednesday as winds ease, with rest of week perhaps cool and bright with scattered wintry showers, mostly moderate N’ly winds and overnight frosts. However, by the weekend possibly less cold and more unsettled with rain or showers and strong SW to W’ly winds.

Sea State Wednesday: Possibly rough, with a 3 to 4 metre NW’ly wind-swell.

 
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