After the misty conditions cleared late morning on Thursday there were bright intervals that lifted the thermometer to 11.9C at 14.20 being 1.6C above my 40-year average and the warmest day since last Sunday. During the evening the clear skies meant much warmth ebbed away into the atmosphere with the thermometer sinking to a low of 0.9C at 03.32 early Friday producing a short lived ground frost. At that time cloud began to drift across and the temperature recovered to 3.2C by 08.00.
Friday revealed a cloudy sky and calm conditions under the prevailing high pressure that is very slowly losing pressure with a reading of 1029.9mb at 08.00, down 8mb since its peak on Monday.
The high pressure will influence our weather for another couple of days but by Sunday the first signs of a change in our weather will be seen as we come under the influence of low pressure to the north. Shorty afterwards a much colder air stream will arrive, likely from the northwest, producing possible air frosts.
It has been a mainly dry month so far with the equivalent loss of rain through evaporation exceeding the rainfall total with 4mm and 1.6mm respectively.
