Categories
August Weather Summer Weather

August 2021 – Disappointing end to summer

After two good months in June and July, August was the party pooper. Also, our party wasn’t spoilt as badly as those in some Southern areas, but it was easily the worst of the three summer months of 2021.

Mean Temp : 15.7C

At one point, the mean was running at about 16.2C, but dropped towards the end of the month due to a cooler spell. It got to 20.0C on 18 days, but only one day went as high as 25.0C (3rd).

The mean maximum actually turned out to be exactly 20.0C and the mean minimum was not too bad at 12.7C. These would have been ok in most summers of the 1980s maybe, but in these post-warming times they were disappointing.

The real reason the party was pooped wasn’t the temperature, but the lack of sunshine. We seemed to get stuck under cloudy anticyclones, pulling winds from unfavourable directions. The last few days of August 2021 featured a nice north easterly, treating us to cold wind, low cloud and drizzle as winds blew from our old friend The North Sea.

The month was only 0.1C cooler than August 2020.

Rainfall : 45.4mm

Rainfall was well spread out over the full month and there were no real dry spells as such. The wettest day was the 21st, which contributed 13.9mm to the total.

Rainfall radar on 21st August 2021

It also rained on 22 days, which is poor for a summer month, but August seems to be getting a reputation recently in being poor. Is that perception justified?

Even though it was so damp, August 2021 was much drier than the previous one, which had 3x as much rain.


Average Pressure : 1019.3mb

Summer months should really be ‘anticyclonic’ and even though it was poor, August 2021 was anticyclonic. The only Low Pressure influence came in the period 5th-9th, giving a disturbed spell of weather.

 

Categories
August Weather Summer Weather

The last 5 Augusts in the UK according to Trevor Harley

2016 A warm month – at 17.0C, the warmest since 2004 in the CET series. It was particularly warm in the east. The highest temperature of the month (and year) was 34.1C at Faversham in Kent on the 24th; the 10th was a cold night, with -1.5C at Kindrogan (Perthshire). The month was changeable in the first half, and warmer and more settled in the second. Rainfalls was very close to the long-term average, although it was wet in parts of the north. It was quite a sunny month, with 110% of average.

2017 Unsettled. The CET temperature was 15.6 (-0.6C), the coolest since 2011. Temperatures were generally slightly beneath average in the south. The month saw a new record high for the late August Bank Holiday Monday, which fell on the 28th this year: 28.2C at Holbeach (Lincs.) – the previous record was set in 1984. The same day it reached 28.9 at Jersey. There was a notable cold front passing through on the 30th; it reached 27C in locations in Kent on the 29th but only 13C on the 30th. Rainfall was about average across mainland Britain, although Northern Ireland was very wet (130% of the average), with severe flooding in places – some areas saw 200%. The 9th was a wet day in the south, with some places seeing 40 mm, and South Uist received 72 mm in thunderstorms overnight on the 22nd. Sunshine was close to average in England and Wales (187 hours, 105%), although it was duller further north and west.

2018 A disappointing month to end a great summer. Overall slightly warmer than average, particularly in the southeast. The highest temperature of the month was 33.2C at Kew on the 3rd, the lowest -1.3C at Braemar on the 7th. Rainfall was 95% of average although there were wide regional variations, some places having half the the average and parts of the SE over 150%. Sunshine was 90% of average, but Shetland had 150% of average. The first week continued the fine, settled weather, but it turned more unsettled from the 8th on.

2019 Mostly unsettled but with a hot sunny in spell in the south 21 – 27th giving a very hot late August Bank Holiday: it was 30.7C at Heathrow on Saturday 24th. The record late Bank Holiday temperature then occurred on Sunday 25th, with 33.3C recorded at London (Heathrow). It was the hottest late Bank Holiday Monday on record by some way, beating 2017, with 33.2C at London Heathrow (on the 26th). It was then 33.4C at Heathrow on Tuesday 27th, the highest temperature of the month – an extraordinary late spell. A thundery breakdown was followed by a cool end to the month. It was slightly warmer than average, but very wet, with 153% of average, and more than twice the average in the north and northwest. It was very slightly sunnier than average across the country. 69.8 mm of rain fell in 24 hours on the 30-31st at Tyndrum (Perthshire).

2020 After an unsettled start, it became very hot, particularly in the southeast. There was a notable heatwave midmonth, peaking with 36.4C recorded at Heathrow on Friday 7th, the highest August reading since 2003. It was 30.1C at Kew on the 6th, then 34.5C at Herstmonceux on the 8th,  34.0C there on the 9th, 35.5C at Heathrow on the 10th, 35.7 at Heathrow on the 11th, and 35.4 at Heathrow on the 12th, giving seven consecutive days above 30C, and six above 34C. St James Park in London recorded six consecutive days over 34C. The very hot spell, mostly localised to the SE, saw five “tropical nights”, with minima above 20C, making six for the year, the highest being a minimum of 22.3 on the 8th at Langdon Bay (Kent). Before recent years these were very rare – yet beween 2008 and  2017 there were only 12 tropical nights in total. It became more unsettled mid-month, and often wet and windy. Overall it was mostly much warmer than average, and slightly duller, with 88% of the expected sunshine. It was a wet month, with 135% of average rainfall. 103.8 mm of rain fell in the meteorological day ending on the 13th at Hollies (Staffs.), and a provisional massive 239.9 mm at East Wretham (Norfolk) on the 16th, which when confirmed will beat the 1924 record.

Source : https://www.trevorharley.com/weather-august.html

Categories
July Weather Monthly Summary Summer Weather

July 2021 Monthly Report – Warm with a good dry spell

July 2021 turned out well. The first week proved to be very wet, with the bulk of the month’s final rainfall falling this week. There was 48.5mm recorded altogether in what was a very short unseasonal spell.

High pressure built in to give us a sustained spell of warm, dry and sunny weather for the next three weeks.

The temperature reached 20 degC on 24 days, and eight of those went as high as 25 degC (including 6 days consecutively from 16th-21st). The maximum was a very hot 29.3 degC on the 17th. This was a very warm spell, causing big problems sleeping as minimum temps were around 16-17 degC overnight.

The mean temperature of 17.5 degC was warm for July, with an average high of a very respectable 22.1 degC and mean min a very high 14.1 degC. The coolest temperature was on the opening day, but even that was just a shade under 10 degC.

The final rainfall total for the month was close to 70mm, which was still on the wet side for a month that was completely dry from the 14th to the 26th!

Overall, a very good summer month, although Durham was fortunate to miss the severe thunderstorms that created havoc and extreme flash flooding problems in the South in the last week.

Categories
July Weather Summer Weather

The end of the July heatwave – Phew!

It’s July 24th and today is the first day i’ve felt remotely comfortable in my own house for weeks. The heat has been slowly building this month, with incredibly stuffy nights keeping me awake and making me feel progressively tired.

Normally our living room is a cool haven, facing North and receiving no direct sunshine, but even this hasn’t been a comfortable place.

The first 23 days of July averaged 17.7 degC. That isn’t record breaking, but it’s very warm for Durham.

The spell of 16th-23rd has been the hottest, averaging 20.3 degC. This has been the spell that’s caused all the sleepless nights. This period  also featured 6 consecutive days over 25 degC, reaching a peak of 29.3 degC on 17th.

The average minimum of 14.3 degC for the first 23 days is also very high. More than 3 degrees above the long term mean of 11.1 degC. From 16th-23rd the mean minimum was 16.1 degC.

It seems that the rest of the month will be cooler and more comfortable. A big ‘Phew’ from me. How has the hot weather affected your life?

Comment below.

Meanwhile, in the South of England, it all went crash, bang, wallop.

Lightning destroys roofs as storms end heatwave in southern England and Wales https://www.bbc.co.uk/news/uk-57952825

Categories
Clouds July Weather

Tornado (Funnel Cloud) over Darlington 10th July 2021

There was a lot of hot but turbulent weather early in July which spawned some thunderstorms and funnel clouds in places. This shot was taken over Darlington on 10th July. Technically this was not a tornado, as it didn’t touch down on the ground, but it was spectacular and probably quite scary for those under it! We would encourage anyone who sees a funnel cloud (especially if it touches the ground to become a tornado) to report it to Torro.  

Categories
July Weather Summer Weather

The last 5 July’s in the UK according to Trevor Harley

July 2016 Slightly warmer than average overall. Unsettled first half, then with a fine spell, and a hot spell from the 18th to 29th, before turning thundery, the month finishing unsettled. Rainfall was about average overall (104%) bit better in the NW and drier in the SE, and very dry in the south.

It was quite a dull month, with 92% of average sunshine. The highest temperature of the month was 33.5C at Brize Norton (Oxon), and 33.9C at Jersey Airport on the 19th. 97.9 mm of rain fell at Nunraw Abbey (East Lotion) on the 20th.

July 2017 An unsettled month, with a few brief fine spells. It was fairly warm in the SE in the first half of the month, then cooler and wetter. It was quite a thundery month. The CET was 16.8C, close to average. Sunshine was above or below average in the south, and above in the far NW. Unusually, July 2017 was sunnier in the Shetland Islands than in Cornwall (the 8th such occasion since 1929),

It was wetter than average, with nearly twice the long-term average in the south and southeast. The highest temperature of the month was 32.2 at Heathrow on the 6th. 78.0 mm of rain fell at Okehampton (Devon) on the 30-31st.

There was devastating flash flooding in the Cornish coastal village of Coverack, on the Lizard Peninsula, with a 1m surge of water, following heavy rain in a thunderstorm on the 18th, when 170mm may have fallen locally.

July 2018 Overall very warm: at 19.1C CET it was better than July 1976, but not as good as July 2006 or 1983. It was particularly warm in the South and East. The first half was anticyclonic and was dry, sunny, and warm everywhere.

It was more unsettled in the second half, particularly in the north. There was a notable heat wave towards the end of the month. It was 33.3C at Santon Downham (Suffolk) on the 23rd. There was a maximum of 35.3C at Faversham and 35.1C at Wisley on the 26th, a minimum of 21.0C at London St James Park overnight on the 26-27, and a maximum of 34.1C at Gravesend on the 27th; and then down to 24.0C at Weybourne on the 28th.

The passing through of the cold front came with some severe thunderstorms. 99mm of rain was recorded at Belfast on the 28th. On average rainfall was 71%, but it was very dry in East Anglia. It was a sunny month with 138% of average (the sixth sunniest July since 1929). Morecambe Bay in Cumbria recorded 111.9 hours of sunshine from 1st to 7th July, which is a new weekly sunshine record.

July 2019. Very warm overall. A cool start, followed by high pressure building, particularly giving fine weather overt he south and west. The second half of the month was more unsettled, but there was an exceptional hot spell 22 – 26 July.

A new July record was set on the 25th with 38.1 in Cambridge in an exceptional heatwave. It was later confirmed that 38.7C (101.7F) was reached at Cambridge Botanical Gardens the same day, beating 2003 and setting a new overall UK record high temperature.

Overall rainfall was 114%, but it was relatively dry in the SW and Wales. Sunshine was exactly average. There was an interesting pheneomenon on 25 July at Donna Nook (Lincs.) when during a “heat burst” at 10.20 pm the temperature briefly rose from 22°C to 32°C.

July 2020 Unsettled until mid-month, then with high pressure mid-month, especially in the south, for a while. There was a very brief heatwave right at the end, but the UK recorded its third highest temperature, with 37.8C at Heathrow on the 31st.

Overall cooler than average, wet (122%, and very wet in southern Scotland and NW England), and dull (83%). SE England tended to be warmer, drier, and sunnier. 101.8 mm of rain fell at Aberllefenni, Cymerau Farm (Gwynedd), on 3-4th.

Source : https://www.trevorharley.com/weather-july.html

Categories
June Weather Monthly Summary Summer Weather

June 2021 Weather Summary – Very Long Dry Spell

June 2021 posted a welcome recovery for the early summer period after the seemingly long cold Spring. The temperature passed the 20 degC mark on 21 days in the and the real notable thing was the great dryness.

There was no measurable rain at Durham from 25th May until 17th June, a spell of 23 consecutive days and even then it was just a trace 0.1mm. The total for the entire month was 26.9mm, but it almost all fell in the last 6 days, and more than half of it on 25th June, when 14.6mm wet us thoroughly.

The average temperature for the month was 15.6 degC, which is on the warm side for June. Average max was a respectable 20.9 degC, making it feel warm and summery. The mean min was also good at 11.5 degC.

The highest temperature of the month was 26.7 degC on the 16th (3 other days got to 25 degC). The coldest was 7.2 degC on 22nd.

It was another completely Anticyclonic month (air pressure >= 1013mb)

Categories
June Weather Summer Weather

The last 5 Junes in the UK according to Trevor Harley

2016 Wet, dull, and quite warm. The first half was more settled and relatively warm. The night of the 22-23 June saw severe thunderstorms with flooding in the SE, particularly in the London area. Farnborough recorded 45.0 mm overnight. The end of the month was cool and unsettled. The average temperature was brought up by some mild nights; the highest temperature of the month was only 27.8C, Porthmadog. Rainfall overall was 144% (95 mm), with a lot of it occurring towards the end of the month. It was particularly wet in the east. There was only 74% of sunshine (137 hours), although Anglesey and some of the western islands recorded above average: Shetland saw 200 hours.

2017 A June that was very different depending on where you were. In the north of Britain it was rather cool, very wet, and rather dull; in the south and east it was very warm, quite dry, and quite sunny. Overall the CET was 16.0C, making it the warmest June in the series since 1976 – but bear in mind that this average hides the regional variation. The month started and ended with unsettled spells. There was a notable heatwave in the middle of the month. The month was quite warm, with 24.3C recorded at London Heathrow on Friday 16th. There then followed a spell of five consecutive days where 30C was recorded somewhere in England, the first time this has happened since 1996: Saturday 17th 30.2C (Teddington), Sunday 18th 32.1C (Hampton), Monday 19th 32.5C (Hampton), Tuesday 20th 31.4C (Wisley), Wednesday 21st 34.5C (Heathrow). The Wednesday high of 34.5C is the highest in June since 1976 (35.6C at Southampton on the 28th). It was much cooler on Thursday 22nd, after a cold front swept south, with a national maximum of “only” 27.2C at Manston (Kent). The lowest temperature of the month was -2.3C at Altnaharra on the 2nd. It was very wet in the north and east, and particularly wet in the Edinburgh region, with 200% of the monthly rainfall there. There were thundery downpours in the SE at the end of the month, with Santon Downham in Norfolk recording 85 mm in 24 hours on the 27th. Although sunshine was close to average overall in England, Scotland only saw 74% of the expected average. So, overall, a very memorable weather month.

2018 Very warm and dry; in some areas the warmest and driest on record. It was the warmest June on record for Northern Ireland. There was a notable heatwave late on, with 30.0C recorded at St James Park in London on the 25th; 30.7 at Rostherne in Cheshere on the 26th; 31.3 at Aviemore on the 27th; 31.9 at Glasgow Bishopton on the 28th. There were some very high temperatures across the north and west on the 28th, with temperatures just above 31C recorded at Aviemore, and over 30C at Castlederg (Northern Ireland) and Trawscoed (Wales), including 30.5 deg. C. at both Thomastown and Derrylin Cornahoule, both Co. Fermanagh, on 28th June;. A provisional figure of 33.2C from near Motherwell was for a short time the new record high for Scotland, beating the August 2003 record; it was later found possibly to be affected by a car parked near by, so the 2003 record stands. It was the fourth sunniest June on record (with 142%, behind 157, 1940, and 1975, since 1929). It was very dry, particularly in the south and southeast, with 48% of average for the UK, and even drier in England and Wales. Essex had 1.7 mm of rain Dorset 2.0 mm, and Middlesex just 0.7 mm. A CET of 16.1 makes June equal with 2003 but behind 1950 (16.2), 1940 and 1970 (16.4) and well behind 1976 (17.0). East coasts were often cooler due to onshore winds and the position of the anticyclone. The highest temperature of the month was 33.0C at Porthmadog on the 29th.Thunderstorms broke out across the country in the final week.

2019 Record-breakingly hot in Europe, but changeable here. Overall the mean temperature was close to average. After a warm start it turned cool and wet, very eat in Lincolnshire, particularly between the 10th and 13th, with cool NE winds, causing local flooding. 74.6 mm rain fell at Wainfleet (Lincs.) on the 10-11th. The final third of the month was warmer and more humid, with some thunder. The 29th (extremely hot in Europe with a Saharan plume) was very hot. Sunshine was 95% of average, dull in the Midlands and West, but sunnier than average in eastern Scotland and the north of England. The highest temoerature of the month was 34.0C at Heathrow and Northolt (London) on the 29th.

2020 After the fine May, June soon become unsettled. There was a late heatwave: 32.6C recorded at Heathrow on the 24th, and 33.4 there on the 25th, followed by a thundery breakdown. Overall it was slightly warmer than average, and it was much wetter than a typical June, with 144%. Sunshine was close to average, although it was quite dull in the west and central and eastern Scotland. In the 24 hours up to 9 am GMT on the 29th, 212.8 mm of rain fell at Honister Pass in Cumbria – this is a new 24 hour record for June. The temperature didn’t fall beneath 20C at Gosport and Hastings on the south coast on June 25th, a rare example of what is called a “tropical night”.

Categories
August Weather Flooding and Rainfall Summer Weather

August 2020 Monthly Weather Report : Good start, poor end

Durham Weather : August 2020

Synoptic chart showing low pressure on 25th August 2020

The weather in Durham in August 2020 was disappointing overall after starting out really well. It was typical of the summer really. There were no long settled spells as such at Durham, although some very warm weather was experienced in the south of the country, culminating with 36.4C recorded at Heathrow and Kew Gardens.

The 11th August (mean 24.0 degC) and 12th August (mean 25.1 degC) were the warmest recorded for those particular dates on the Central England Temperature series.

Thunderstorms were extensive across the country after that, but we escaped most of them in Gilesgate, although there were some near misses, with torrential rain.

It was actually pretty dry up to the 17th (12.2mm, 8 days with rain). The temperature reached 28.0 degC on the 7th, which averaged 21.3 degC. This was the high for the month.

Then from 17th it turned really wet and temps declined markedly, with 22.8mm on 17th and rain every day from the 13th to 30th.

The last week of the month was very wet, with 12.5mm on 23rd, 12.8mm on 25th, 13.8mm on 27th and 29.8mm on the 28th August. There was a cloudburst in Durham on Sunday 23rd which dropped 9mm in 10mins in the early afternoon. This was right in the middle of the wet spell.

Here is the chart for Tuesday 25th August. It was very wet and windy. The pressure was very low for August, falling to 986.4mb and the northern flank of this depression gave us the heavy rain driven in from the East.

This last week has become progressively colder and wetter, culminating in 13.8mm on 27th and 29.8mm on 28th. Total for the month is now 127.1mm .

Maximum temp on the 28th was only 13.5 degC with a keen NE wind. The 29th was cooler still at 12.7 degC.

As is frequent in August, the last few days can be quite cool, and the monthly minimum was 5.3 degC on the morning of 31st. This was a really nice late summers day.

Monthly graphic of rainfall and temperature at Durham August 2020
Monthly graphic of rainfall and temperature at Durham August 2020

 

Monthly summary of temperature at Durham in August 2020
Monthly summary of temperature at Durham in August 2020

 

Summary of rainfall in Durham August 2020
Summary of rainfall in Durham August 2020

 

Summary of atmospheric pressure at Durham August 2020
Summary of atmospheric pressure at Durham August 2020

 

View across Durham on the last day of the summer 2020
View across Durham on the last day of the summer 2020

 

Durham Castle and Cathedral from The Riverwalk
Durham Castle and Cathedral from The Riverwalk on last day of summer 2020

 

Sunset over the North Sea 31st August 2020
Sunset over the North Sea 31st August 2020
Categories
August Weather Durham Photos Flooding and Rainfall Summer Weather

An August Deluge – Nearly 1/2” of rain in 10 minutes!

23rd August 2020. Very heavy rain in Durham

Above is the scene from the Bandstand by the River Wear in Durham on Sunday 23rd August 2020. The heavy deluge dropped 9mm of rain in 10 minutes on Durham and it’s surroundings. That’s a rate of 54mm per hour, which is a proper dowpour.

In the town, the narrow streets were rapidly turned into rivers and driving visibility was virtually nil.

Thanks to Kev Allison for the photo via Facebook.