June 2020 – First half cool, Second half very warm

Temperature

Overall, June was warmer than average, but there was a very cool wet spell in the first half of the month. The mean max was +1.1 degC above normal and the mean min +2.0 degC above.

Between the 3rd and 12th, the maximum temperature was only 16.1 degC (9th) and fell to as low as 5.5 degC on the morning that same day. A very cold day for June. It was also wet (see below).

Temperatures recovered strongly after the 14th, peaking on the 24th at 29.7 degC. In some areas of the country it was the warmest for that date, beating the record set in 1976. From the 23rd to the 26th it averaged over 20 degC in Durham. Very sticky sleeping conditions.

The second half of the month was very warm and pleasant.




Rainfall

After a very dry spring, June returned to the type of previous years, particularly in the first half.

83.1mm fell in the cool spell between 3rd and 13th. This made up most of the monthly total of 100.9mm. That’s getting on for double the normal for June. There were 19 days with rain overall during the month.

The wettest day was the 12th with 29.2mm, but  the previous day was also wet with 17.0mm, giving a 48hr total of 46.2mm. Most of that total seemed to be absorbed by the very dry ground – the river didn’t rise much at all.

Atmospheric Pressure

The month was mainly anticyclonic again, but there were some very stormy high winds in the cool spell in the first half and at the very end of the month too.

New Videos – Aurora Borealis + Cloudscapes

I’ve recently started creating videos on YouTube centred around Weather, and here’s the very first one that I put together – an awesome compilation of Aurora shots. We’re not quite far enough North to see the Northern Lights on a regular basis, but it shows itself occasionally when conditions are favourable. Anyhow, enjoy! Please like the videos and Subscribe to my channel if you want me to make more videos.

The second one is a selection of Cloudscapes.

May 2020 Report – Warm, Dry and Sunny Again

Picture by Mark Pritchard

The Weather in Durham in May 2020.

May 2020 continued the Spring theme in that it was very dry overall, after the first few days, but they yielded some heavy hail showers on May 3rd. This picture was taken in Darlington, about 18 miles to the south of Durham. The weather soon calmed down though and the overwhelming feature was the anticyclone close to the UK, almost all the way through the month after the first couple of days.

Sunny as well – according to The Met Office. Sunshine records were broken across the country in Spring 2020. Could this be due to the drop in air pollution during Coronavirus lockdown? I don’t know, but the weather has been beautiful. Here’s a little graphic showing the stats in a nutshell.

I don’t record sunshine totals at Durham because of the restrictions around my location (buildings obstructing the site), but it seems conditions were more or less the same all over the country. However, the long term figures for Durham University indicate that 447.4hrs of sunshine is normal for Durham.

Here’s a link to the Met Office for more detailed info.

May 2020 becomes the sunniest calendar month on record

Temperature in May 2020

The temperature in May 2020 was well above normal. The long term means for Durham are Max 15.0 degC and Min 6.1 degC. Here are the daily records.  The mean maximum came in at 18.2 degC, which is 3.2 degC above average. The average minimum was also 2.0 degC above average.

The thermometer passed the 25 degC mark on 3 days (20th, 28th and 29th) and was also over 20 degC on a further 7 days. The absolute maximum was 27.2 degC on the 29th. The chilly nights of the 2nd week resulted in the minima of 1.9 degC early on the morning of the 13th.

Rainfall in May 2020

May 2020 was very dry, with only 18.8 mm recorded. This came after the very low total for April 2020. This made the total rainfall for Spring a meagre 44.6 mm. The mean rainfall for Spring in Durham is 141.5 mm, so a 68.5% deficit.

Atmospheric Pressure in May 2020

The mean pressure for the month was 1025.1 mb, which is incredibly high for a monthly average. 28 of the month’s days could be classified as Anticyclonic, with only the 1st, 2nd and 22nd dropped into cyclonic territory. This probably explained the low rainfall totals.

The high pressure wasn’t always in the right place for optimum warmth, at times dragging in a cold breeze from the North Sea, most notably in the second week.

Summary for May 2020

Another exceptional month. The extreme dryness came after a very prolonged wet spell spanning the second half of 2019 up until February 2020. Because of this, the water table was already exceptionally high at the start of the year and no difficulties should really be had over the summer months.

It remains to be seen whether the balmy conditions continue into June 2020, but the early signs don’t look too good, with northerly winds and rain forecast in the early part of the month.

April 2020 Monthly Weather Report – Very Warm and Dry

April 2020 was an extraordinary month in more senses than just Weather.

By now, you’ve probably noticed that we’re still in lockdown. The confusion of the second half of March continued into the first part of April, but I got the feeling that people were gradually getting used to it. The weather had also been tempting to those who were desperate to be outside.

See some photographs from lockdown in Durham

Although I don’t record it at Durham, the Met Office have said that April 2020 was exceptionally sunny. This was apparent to me because we’d spent a good deal of time out in the garden whilst coffee shops, pubs and restaurants were out of bounds to us.

It was also a very mild month. In fact, the mean maximum temperature was way above what I would expect for April. The normal for Durham is 11.9 degC. In April 2020, the mean maximum was 14.8 degC (+2.9). The mean minimum was also well above normal at 5.5 degC, which is +1.8 degC above average. It reached 20 degC on 3 days – the 8th, 11th and 15th. So the second week was undoubtedly the best, although the 13th was a notably cold day as the High Pressure brought cold winds off the North Sea. The maximum was only 7.3 degC. There was also an air frost the following night, the only instance in the month.

As well as the previously mentioned warmth, April was phenomenally dry. There was only 3.9mm of rain recorded for the whole month. That is probably in the top 10 of driest Aprils at Durham (I await the report from the official Durham University station as this will give the definitive narrative).

Update : Only 1938 (2.2 mm) and 1912 (2.4 mm) have seen drier Aprils since 1850. Only four years have seen fewer rain days in April: 3 in 1912 and 4 in 1938, 1974 and 2011.

The cause of the good weather? Undoubtedly High Pressure systems which seemed to be in and around the UK for most of the month. If we define the High/Low borderline for Air Pressure at 1013mb, then April had 26 Anticyclonic days, compared with just 4 cyclonic ones (all at the very end of the month). The High Pressure did tend to wander though, and subtle changes in position made big differences to the weather we experienced.

 

Incredible Red Sunset in Durham April 26th 2020

Just had this photo sent of the incredible sunset of 26th April. The sun was setting under a shallow cloud cover and it produced this red sunset and double rainbow. The cloud produced the first measurable rain for 2 weeks, in what looks destined to be one of the driest Aprils on record in Durham.

The driest April was in 1938. This month only received 2mm of rainfall.

Incredible Red Sunset in Durham April 26th 2020
Incredible Red Sunset in Durham April 26th 2020
Double Rainbow April 26th 2020
Double Rainbow April 26th 2020

Website created by D.K. O'Hara Copyright 2018. dkohara.com
arahokd