That is most unusual if I recall correctly. Not talked about an 'upjustment 'before!

For the record, wasn't 25th July 2019 also a 25.2 CET day?

 

Sorry yes it was. Not updated the record column in my spreadsheet. 

I wouldn't be surprised if 12 Aug this year ends up at 25.2C as well. I can only estimate the maximums at Stonyhurst and Pershore College so I would not be surprised if my 25.1C estimate is upgraded. I estimated 25.0C for 25th Jul last year.

 

Will 7th-13th Aug knock 2003 down a peg? Putting 2020 in third position, behind only the two greatest heatwaves; and when we consider, earlier on, not all CET stations were feeling the heat!

No. 13th August was slightly cooler than 6 August.

Accepting that my table will not be totally accurate, we have had 5 of the 30 hottest days on record in the last 2 weeks.

Table

So far this year we have set 8 date records for maximum UK temperatures (and in addition equalled the record on one other date and missed another record by 0.1C)

7 January Achfary 15.5C (prev. record 15.0C 1934 & 1989)

5 April Oxford 22.8C (equalled existing record in 1892)

10 April Treknow 26.0C (23.3 1909,2011)

24 June Heathrow 32.6C (32.4C 1976)

31 July Heathrow 37.8C (33.9C 1943)

7 Aug Heathrow 36.4C (34.0C 1975)

8 Aug Herstmonceux 34.5C (34.2C 1975)

11 Aug Heathrow 35.7C (34.7C 2003)

12 Aug Heathrow 35.4C (33.9C 1911,1953)

Total number of 30C+ days so far in 2020 - 11

Here are the stats for Heathrow for all the heatwaves since 1976. The last 7 days are comfortably the hottest on record at Heathrow over a 7 day period. 

Highest 7 day heatwave mean maximum temperature at Heathrow 

2020 6-12 Aug       34.3C
2003 5-11 Aug       33.5C
1976 23-29 Jun      32.9C
1976 1-7 Jul           32.5C
2006 16-22 Jul       32.1C
1995 29 Jul-4 Aug   31.6C

Highest 7 day heatwave mean temperature at Heathrow

2020 7-13 Aug        26.8C
2003 5-11 Aug        26.3C
1976 23-29 Jun       25.6C
2006 16-22 Jul        25.3C
1976 1-7 Jul            25.1C
1995 29 Jul-4 Aug    24.9C

Thanks for the stats GW!  I do love to watch these records fall and it kind of makes me feel good to witness them!  I’ve been around for a few record summers but it still feels special!  

So far this year we have set 8 date records for maximum UK temperatures (and in addition equalled the record on one other date and missed another record by 0.1C)

7 January Achfary 15.5C (prev. record 15.0C 1934 & 1989)

5 April Oxford 22.8C (equalled existing record in 1892)

10 April Treknow 26.0C (23.3 1909,2011)

24 June Heathrow 32.6C (32.4C 1976)

31 July Heathrow 37.8C (33.9C 1943)

7 Aug Heathrow 36.4C (34.0C 1975)

8 Aug Herstmonceux 34.5C (34.2C 1975)

11 Aug Heathrow 35.7C (34.7C 2003)

12 Aug Heathrow 35.4C (33.9C 1911,1953)

 

Total number of 30C+ days so far in 2020 - 11

These are amazing stats and are quite concerning, even for heat lovers. 

So far this year we have set 8 date records for maximum UK temperatures (and in addition equalled the record on one other date and missed another record by 0.1C)

7 January Achfary 15.5C (prev. record 15.0C 1934 & 1989)

5 April Oxford 22.8C (equalled existing record in 1892)

10 April Treknow 26.0C (23.3 1909,2011)

24 June Heathrow 32.6C (32.4C 1976)

31 July Heathrow 37.8C (33.9C 1943)

7 Aug Heathrow 36.4C (34.0C 1975)

8 Aug Herstmonceux 34.5C (34.2C 1975)

11 Aug Heathrow 35.7C (34.7C 2003)

12 Aug Heathrow 35.4C (33.9C 1911,1953)

 

Total number of 30C+ days so far in 2020 - 11

Remarkable and concerning. I wonder what the climate change deniers have to say about this?

This sticky clag we've gone into since the heatwave ended is awful

It's a bit like the December/January "blanket" you get in a moist SW airstream when the temperature hovers around 10-12C day and night

On the hourly readings from Kew the 24 hour temperature till 09:00 today never went above 19.7C or below 17.2C and the dewpoints were almost identical to the temperature

Must be the weekend -I's starting to sound like Richard of Aberdeen

 

Remarkable and concerning. I wonder what the climate change deniers have to say about this?

It carries on a rather worrying trend that was particularly stark last year.

In 2019 we set 13 date records across the whole year.

In 2018 we set 5 date records across the whole year.

In 2017 we set 6 date records across the whole year.

This sticky clag we've gone into since the heatwave ended is awful

It's a bit like the December/January "blanket" you get in a moist SW airstream when the temperature hovers around 10-12C day and night

On the hourly readings from Kew the 24 hour temperature till 09:00 today never went above 19.7C or below 17.2C and the dewpoints were almost identical to the temperature

Must be the weekend -I's starting to sound like Richard of Aberdeen

Yes, tropical cloud forest stuff. Half expect to spot rare lemurs in the trees or stumble across Jane Goodall on my walk to Costcutter.

 

Remarkable and concerning. I wonder what the climate change deniers have to say about this?

Greenland saw a new minimum of -66C last winter :-D

Met Office Hadley   NO UPDATE to 12:20.

Metcheck                19.48c      Anomaly     3.25c

Netweather             19.89c      Anomaly     3.7c

Peasedown St John   1.52c       Anomaly     2.14c.   

More fascinating stats from GW - cheers. The climate trend sure is alarming, it's like we've jumped onto a trampoline in the past few years.

GFS 00z supports my recent deduction that I will probably have the temperature pattern across the month about right, but be near a degree Celsius too low with my estimate, having underestimated the heatwave (hardly surprising, given how extreme the peak days ended up being).

Rough CET estimate takes until 22nd to drop below the 19s, then 27th to drop below the 18s.

There's an issue with taking much from this, though - it's one of the coolest runs I've seen for the final week of the month. Goes to show how much of a reserve Aug 2020 has now. Even more impressive when considering that four days into the month, the CET was running well below average!

Really, it's the very gradual transition of the Atlantic trough eastward this coming week that renders a finish below the mid-17s as highly unlikely. Remains to be seen just how gradual, as there will be ex-Kyle getting involved, but even if it turned out a couple of days quicker or slower, that'd only affect the final CET by less than half a degree by my reckoning.

Sigh... the summer months have a habit of giving me headaches and not just when it's hot and humid .

I went for 17.5c in July and was too high. I’ve gone for exactly the same for August and I look like being too low!  

No Update from Met Office

Metcheck        19.35c      Anomaly     3.13c

Netweather     19.5c.       Anomaly     3.56c

Peasedown St John  18.64c  Anomaly  2.26c. 

No Update From Met Office.

Metcheck                 19.22c     Anomaly      2.99c

Netweather              19.64c     Anomaly      3.45c

Peasedown St John   18.73c     Anomaly      2.35c.

Metcheck                     19.08c      Anomaly        2.87c

Netweather                  19.54c      Anomaly        2.35c

Peasedown St John       18.86c      Anomaly        2.48c.

Without Hadley, thought I'd look at my own averages. No day in August yet < 17°C; mean to 18th 20.9°C with the highest being the 12th at 25.8°C and the lowest being 4th at 17.0°C.

The 10-day run of super-17C nights has been very influential. Only the 4-day period from 2nd to 5th had sub-14 minima.

No Hadley

Metcheck                  19.05c       Anomaly       2.83c.

Netweather               19.49c       Anomaly      3.3c

Peasedown St John    17.43c       Anomaly      2.46c. Average of  9 Locals.