Friday was a repeat of previous days with total, low cloud cover all day trapped under the high pressure. The misty conditions worsened as the morning progressed that saw visibility slowly descend to 200m by 11.00. The mist descended in the evening again but not as thick as previous days. Drizzle was often felt outside and amounted to just 0.6mm. The was once again very little variation between the maximum of 5.9C, being 2.2C below average, and the minimum of 4.2C, which was 1.7C above average, recorded at 06.56 early Saturday.
The maximum over the last four days has slowly fallen away with 11.2C, 9.7C, 6.4C and 5.9C respectively. The same pattern is seen in the minimum values over the last four days with 8.4C, 6.2C, 4.9C and 4.2C respectively.
I cannot see a pattern in the records over the past 40 years where the humidity at 08.00 was 100% for five consecutive days and persisted throughout each twenty-four period.
The other significant feature over recent days has been the lack of air movement due to the minimal gradient variation with maximum air movement of just 13mph, 10mph, 7mph and 6mph respectively being almost under the centre of the anticyclone.
Saturday began as previous days but it was mist masking the Marlborough Downs and Savernake Forest rather than fog.The temperature at 08.00 registered 4.4C, the coolest morning since the 23rd.
The high pressure that has trapped the stagnant air below it is very slow declining and easing eayswtads over France. Three low pressure systems are Deve,oping in the eastern Atlantic that will slow begin to influence our weather from later on Sunday into next week. The barometric pressure at 08.00 was logged at 1029.8mb, down from the peak of 1036.1mb on Thursday.
