There was minimal brightness on Tuesday morning that resulted in the temperature eventually rising to a maximum of 5.9C at 12.16, which was 1.2C below the average. Cloud built up after midday that limited any further rise in temperature.
Wednesday began with very misty conditions, humidity at 99% and a temperature of 2.6C at 08.00 as a cold weather front crossed our area, that should slowly improve in the late morning. These conditions are the result of the two depressions, to the northwest and southwest of the UK, easing in from the Atlantic. The barometric pressure has fallen to a low of 1005.3mb, down a significant 46mb since the 12th, the lowest since the 6th. As these the depressions move eastwards they have resulted in the wind backing into the north and northwest today.
The recent Arctic air over North America has been merging with tropical air from the Bay of Mexico producing a strong temperature contrast fuelling a very powerful Jet Stream, possibly as strong as 250mph. This will rush across the Atlantic likely bringing with it a very low-pressure system arriving on Friday that has been named Storm Eowyn, the fifth of the season. The forecast centre pressure is thought to be an exceptional 948mb before it reaches the UK. The most recent estimate is that the track of this storm will be to the north of the UK although the forecast is for winds to increase to around 47mph at their peak over southern England.
