Wind chill on Monday morning!

The wind did increase in strength Sunday afternoon and overnight, as forecast, with a peak gust of 33mph at 05.20 Monday morning. The temperature at 08.00 on Monday was 4.2C but due to the strength and direction of the wind, a cool northerly, a wind chill meant it felt more like -0.1C at that time outside.

The maximum of 6.8C on Sunday made it the coolest day since the 7th (5.5C) being 1.3C below my 40-year average. Irrespective of the strong north northeasterly overnight the cloud cover meant a low of 4.1C at 07.30 Monday was 2.4C above my 40-year average. Not only the cloud limited the loss of warmth into the atmosphere, acting as a blanket, but the wind kept the air constantly on the move. The rainfall for the past twenty four hours measured 7.7mm that took the monthly total to 139.3mm, which is 212% of my 40-year average.

The low pressure system that caused the rain and wind over the past twenty-four hours has now moved across to the near Continent. As it continues to move further away the barometric pressure will continue to rise rapidly. This will also be due to an intense high-pressure system mid-Atlantic that is producing a temporary ridge of high pressure over the UK on Monday helping to funnel the strong wind down from the north between the clockwise rotating air mass of the high pressure and anticlockwise low pressure systems. The air is much drier this morning reading 88% at 08.00, the driest air flow this month.

Stormy period ahead late on Sunday

A peak of 8.6C on Saturday was a degree up on the cool Friday also just creeping above my 40-year average (+0.5C). However, the opposite occurred overnight as the thermometer dropped below freezing (-0.1C) at 22.26 and slowly descended until it reached a minimum of -2.1C at 04.11 early on Sunday producing a modest air frost. This was the coldest night since 20th January being 3.8C below my 40-year average minimum for February.

Sunday after dawn revealed broken cloud that had slowly drifted in allowing the thermometer to recover to -0.4C at 08.00, also brief glimmers of weak sunshine.

A deep low-pressure system was centred just off the coast of southwest Ireland at midnight and is forecast to slowly move southeastwards during the day. This will mean a likely dry morning but with increasing cloud and rain arriving around mid-afternoon. As the depression passes at its closest to the Southwest the wind will pick up considerably, probably above 40mph at its strongest. The wind at 08.00 was light and from the east and will continue from an easterly quadrant all day.

The soil temperature at a depth of 5cm read 1.5C at 08.00, the lowest since 27th January due to the colder days and recent cold nights.

Coldest night for over a month

The maximum of 7.6C on Friday made it the coolest day since the beginning of the month and the first below my 40-year average since the 2nd. Clear skies overnight meant a low of -1.4C at 05.56 Saturday producing an air frost. This minimum was 3.1C below my 40-year average and the coldest night since 20th January.

The early risers on Saturday saw brief, weak sunshine but by 07.30 a sheet of cloud had moved eastwards blocking out all possible brightness. This was due to a weather system running along the English Channel throwing cloud over southern England with the possibility of rain and depressed temperatures. The wind direction is going to change considerably today from southeast to north west and then back again to southwest as the centre of the low pressure moves eastwards.

Cool, very cool!

The thermometer dropped abruptly 3.4C on Thursday morning at 08.40 as the squall went through then dropped a further 0.6C in the next half hour. The rain was almost continuous on Thursday adding another 14.7mm taking the monthly total to 130.6mm, some 65mm above my 40-year average.

The sky began to clear late afternoon that led to a much cooler night with the thermometer sinking to 2.2C at 23.15 late Thursday, rising to 3.9C at 08.00 on Friday. This minimum was the lowest since 2nd February.

Friday initially began with weak sunshine but cloud soon drifted in from the west limiting its strength.

There are four areas of low pressure to the north of the UK that are influencing our current weather producing a light northwesterly of a showery nature. The cool air that arrived behind the cold fronts yesterday will continue for much of the day.

Cooler days ahead!

The cooling of the exceptionally warm days started on Wednesday with the coolest day for almost for a week when the thermometer rose to 11.8C, however, this was still 3.7C above my 40-year average. Overnight was also mild with the thermometer not sinking below 7.7C being 6.0C above the average.

Rain was logged starting at 15.30 on Wednesday and after a mainly dry night began again at 05.45 in advance of the main rain band on Thursday. Another 8.2mmm took the monthly total to 115.9mm, which is 176% of my 40-year average.

With a week to go in February the rainfall for the winter season is currently 139% of my 40-year average or + 90mm.

Thursday will be the last of the warm days that began with a temperature of 9.8C at 08.00. Late morning will see a drop in temperature as two cold fronts pass over southern England that will then drag in colder air behind them. There will be a significant lowering of temperatures by day and night for several days as the wind veers from southwest and west into the northwest.

The depression over Iceland is now exerting its influence more strongly over the UK as the high pressure system over the Continent slips away producing a barometric pressure of 983.7mb at 08.00, the lowest for almost a fortnight.

Update: Within an hour of my readings at 08.00, at which time the thermometer read 9.8C, the temperature had dropped 3C to read 6.8C after the cold front had passed through. By 09.30 there was a further fall to 6.3C with the wind already having veered into the northwest.

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