A little rain and warmer, for a time!

The wind having backed into the southwest predominantly on Thursday meant a warm day with a maximum of 11.7C. However, this was still 2.6C below the 37-year April average but with much lighter winds and 3 hours of sunken it felt much warmer.

A very light shower fell at 20.15 that amounted to just 0.4mm, the first measurable precipitation since 27th March.

The minimum overnight was also below average with a low of 3.7C at 06.33 on Friday, which was 0.4C below average. In fact there has only been one night this month that was above average, namely 1st with 7.6C (+3.5C).

There was some brightness and limited sunshine on Friday morning through broken cloud. However, with a cold front on our doorstep, cloud will increase as the morning progresses and it will get colder again.

Cooler again

There was minimal sunshine of Wednesday, just under an hour, that combined with the brisk wind from the north west, limited the thermometer to a peak of 6.1C. This was a significant 8.2C below the 37-year average and the coldest day since 6th March.

The low humidity continues, partly due to the drier air recently from the north and that we have had 11 consecutive days without rainfall.

There was a brief air frost overnight as the temperature dropped away to -0.3C at 01.35 before recovering to 4.2C at 08.00 on Thursday.

Sadly no sunshine on Thursday morning as there was complete cloud cover. However, the wind is much lighter and significantly has backed into the southwest or west-southwest. As a result of this change in wind direction today should be less cold. The ground has lost a lot of warmth recently with the soil thermometer at a depth of 5cm reading 3.8C at 08.00 today after dropping to 0.7C yesterday at that time.

Snow grains and snow flakes but its April!

The Arctic air produced several showers during daylight hours on Tuesday. Initially there were very light snow grains but later in the afternoon there were two heavier showers of small snowflakes that were light in nature and not measurable for equivalent rainfall quantity thus logged as a trace.

The thermometer struggled to reach a peak of 7.9C, again below average (-6.4C). During showers the temperature dropped 3C. Wind chill produced by the strong north westerly wind, gusting to 28mph, was in evidence all day making it feel at least 2C colder outside than indicated on the thermometer. The thermometer at 14.07 dropped to 4.2C in one shower with wind chill making it feel more like 2.5C on exposed skin outside.

A hard frost set in overnight with the thermometer dropping below zero at 22.52 and falling steadily until reaching a minimum of -3.3C at 06.16 on Wednesday.

Wednesday after dawn saw glorious sunshine but short lived as just before 07.30 broken cloud began to drift across the sky blocking out most of the sun but it was bright. The thermometer at 08.00 was still below freezing reading -0.1C. The air is still very dry with humidity at 08.00 just 79%.

Arctic blast produced ice pellets & wind chill

The very cold air streaming down from the Arctic on Monday meant a cold day with the temperature not getting above 8.2C, which was 6.1C below the April average. However, that was only part of the story as the strong wind, gusting to 24mph, meant there was significant wind chill that for most of the day it felt at least 2C colder outside than indicated on the thermometer.

A band of light precipitation crossed the area at 11.40 and ice pellets were observed. It was not fluffy snowflakes as what fell from the sky was very much smaller than hail and much more irregular and bounced as it hit the ground. Being small and light it was blown around in the wind and could have been mistaken for small snowflakes. Ice pellets form when snowflakes start to melt as they drop from the cloud, then fall through sub-freezing air, whereby they refreeze into grain-like particles.

The thermometer dropped below zero at 22.41 Monday evening and continued downwards unit 07.20 on Tuesday. This produced another hard frost with a minimum of -2.8C at 05.00 on Tuesday. This low was 4.9C below the 37-year average.

Much blue sky and sunshine was in evidence after dawn on Tuesday but shortly after 08.00 cloud began to drift across obscuring much of the sun. By that time the thermometer had recovered to 1.6C. The anticyclone has drifted a little further south so the wind has backed a few degrees and currently coming from the north-northwest. The very dry air continues with humidity at 08.00 as low as 73%.

Cold front arrives with ‘Arctic Blast’ and exceptionally dry air.

Sunday was a gorgeous day with 9.8 hours of glorious sunshine and in the afternoon the thermometer rose to 15.9C being 1.6C above the 37-year average.

Overnight and during the early hours two cold fronts traversed the area with the wind veering from the west and then northwest into the north. The second cold front passed over southern England at dawn with thick cloud and very light drizzle that was not measurable but recorded as a ‘Trace’.

Monday morning after 08.00 saw the cloud thinning and rising as the weather front continued southward. By this time the thermometer had fallen away to its lowest point with a minimum of 5.2C. The humidity on the northerly wind is exceptionally dry with a reading of 67% at 08.00. The last time the humidity at this time of day was so low was on the 9th July 2019 with 69%.