Next anticyclone intensifies

As one anticyclone departed the country another began to influence our weather on Wednesday with a consequent rise in barometric pressure. It was the eighth consecutive dry day with light winds from the north although a little stronger than of late.

The temperature by day brought a maximum of 8.5C being 1.5C above the average and with clear skies the thermometer slowly dropped during the evening to produce an air frost with a minimum of -1.2C at 07.20 on Thursday.

Thursday dawned with clear skies and an appearance of the sun as soon as it rose above the horizon. The thermometer had recovered a little to read -0.3C at 08.00.

The new high pressure system is currently centred to the west of Ireland that will mean the breeze will veer a little to come from the north, which will mean a cool if sunny day. The pressure reading at 0800 was 1036.1mb.

Thick fog descended, most dense for a year

Tuesday started bright but evidence of fog from the Thames Valley was seen to the Northwest at 07.45. The fog rolled across the area so that by 08.15 the visibility was dawn to 200m. However, over the next hour the fog became more dense limiting visibility to 100m. Just after 10.30 there was evidence of thinning but it took almost to midday before it cleared to misty conditions. The temperature slowly rose above freezing at 10.30.

There followed 0.8 hours of sunshine, that after such a cold and foggy start, struggled to reach a maximum of 6.4C being 0.6C below average.

During the evening the thermometer slowly dropped to -0.5C at 23.10 before reversing the trend that saw the temperature rose to 3.1C at 08.00 on Wednesday.

Wednesday initially saw a little brightness to the east but the sky was predominantly cloudy under calm conditions.

Dry, cold weather continues

The thermometer eventually reached 8.1C on Monday, being 1.1C above the average, thanks to the 5.4 hours of strong sunshine, that made it the sunniest day since 2nd November.

During the early evening the thermometer fell rapidly so that by 19.32 it had reached -0.1C and -3.0C at 23.00. However, the minimum of -3.9C was recorded at 06.31 on Tuesday, being 5.2C below the 37-yea4 average.

In the early hours of Tuesday, well before dawn, the sky was covered in very thin, speckled cloud that was illuminated by the first full moon of the year and was an eerie sight when the night is usually dark.

At first light on Tuesday there was clear sky to the east but by 08.00 the cloud cover had thickened and completely covered the sky.

Fog was observed to the north of Marlborough at 07.45 and by 08.15 had drifted over the area restricting visibility to 150m. By 09.30 the fog had become more dense limiting visibility to 100m.

A warmer day on Sunday

Sunday saw the temperature rise 2.8C above the 37-year average at 13.05 with a maximum of 9.8C, even though we only had 2.2 hours of sunshine.

Inevitably clear skies overnight brought an air frost with a minimum of -1.2C in the early hours being 2.5C below the average. However, after 06.30 on Monday the thermometer began to rise a little with a reading of 1.8C at 08.00.

Monday arrived with clear skies continuing and the appearance of the sun as soon as it rose above the horizon.

The barometric pressure has been rising again for the past twenty-four hours as another anticyclone approached the UK. The centre is just off the coast of Cornwall with a reading of 1038.4mb at 08.00, the highest for five days.

Calm conditions continue

Yet again, under the influence of the anticyclone, Saturday was a calm day that saw hours when there was no moment of air to awake the anemometers and one maximum gust of 8mph.It was a cool day with the thermometer not exceeding 5.9C being 1.1C below average and the first below average maximum for over a week.

The temperature began to fall slowly late evening from 4.9C to 2.0C at 07.35 on Sunday.

Sunday after first light revealed fog with visibility down 200m. However, the fog was observed to begin thinning after 07.40 as a cloud bank eased away to the north east. By 08.30 the conditions had improved markedly leaving mist that revealed greatly improved visibility.