The thermometer on Saturday struggled to reach 0.8C by 14.53 and stayed there until early evening before the snow arrived. The first sleet and snow was observed at 18.30, shortly afterwards the thermometer dropped to 0.6C. The snow was observed turning to drizzle at 22.20 and heavier rain at 23.00. It was not until 01.30 early Sunday that the influence of the warm front was seen when the thermometer very slowly began to rise, a little more rapidly after 05.00, reaching 2.9C at 08.00.
The precipitation, rainfall and melted snow and sleet, amounted to 27.4mm by 08.00, the wettest day since 24th November.
A significant event occurred after 08.00 at which time the thermometer read 2.9C. By 08.15 the temperature had rapidly increased to 7.8C, the mist lifted but moisture was deposited on the outside of cold window surfaces. At 08.30 the thermometer had risen to 9.6C and continued to rise.
Sunday after dawn revealed fog with visibility down to 300m with light rain falling, heavier after 08.10.
The moist air from the warm front that arrived last night was much lighter than the previous Artic cold air and rose above it, the moisture in it condensed and cooled hence the sleet and snow that then followed.
The wintry weather is associated with a low pressure system just off the southwest coast of Ireland that is continuing to deepen and travel eastwards over the UK, this has seen the wind direction change from east-southeast yesterday to southwest today. The barometric pressure at 08.00 read 987.9mb, the lowest pressure since 26th September 2024.
Update at 09.00: the temperature has reached 10.4C resulting in a rapid thaw this last hour.
At 10.00: temperature risen to 11.4C
I hope that the 2025 Data sheet will be online this coming week when my webmaster returns to work.