Teddington hit 32.4C. So a little way off the date record, and 0.3C cooler than today was in 1976.

I was there on Sunday, Frinton on Sea, you could pretty much go straight in without having to get used to it lol. 

Incredibly warm for so early in Summer. 

Temp was supposed to be 21, but felt about 16

I’m thinking of doing a heatwave index to measure this one up against others. The system would be:

- heatwave starts when somewhere in UK hits 30.0C and ends when it it fails to do so anywhere

- 1 point for every degree day above 30C, plus 1 (ie 1 point for 30.0, 1.5 for 30.5C and so on.)

- then add a point per day of duration.

So a classic working week heatwave of 30,31,33,33,30 would score 17, while a 3 day wonder record attempt of 34,40,33 then bust would get 23.

Incidentally on that model the to-date (from Sunday) and GFS modelled maxes from the 12z give us a 14 day event.

30.3 (Heathrow)

34.0 (Teddington)

32.4 (Teddington)

34

35

35

34

33

34

34

36

32

31

31

Which would score 59.7 + 14 = 73.7 points.

Roost Weather has daily max and min for every date since 1900 and before. https://www.roostweather.com/ukobs/ukgraphs.php?type=yeardailyextreme&field=temp 

It maybe misses some manual data eg the Lingwood 37.7 from June is not there. 

This is the key bit for me. We are on heatwave number 3. All of them remarkable, and we are only a third of the way into summer. Incredible 

In 1995 was 22C to 24C sea temps over SE coasts from viewing daily sea temps data from satellite German teletext ARD19 channel had brilliant weather data for sea and snow reports like highest I seen was St Anton 650cm top 550cm lower.  They are updated until May it gone and return in October. After seeing high sea temps in 1995 it fell fast in the short autumn we had as colder winter set in early so ended at 4C to 6C in Feb 1996.  This year should break the record high sea temps and if so will a repeat to drop back fast?

Excellent. Will get compiling some scores tomorrow. 

Was it also full of human excrement?

I think its one of the cleanest areas of coast. Quite a few jellyfish though.

The Met Office extremes page says Frittenden was the max, which was also 32.4 but a few hundredths lower than Teddington. Maybe they have doubts about Teddington at the moment too?

I think it’s more to do with alphabetical order. And only using one decimal place. 

GFS doesn't quite make it to 30 on Monday. The GEFS have definitely picked up a dip around the 12th-14th but quite a few runs pick it up to properly hot territory again after that. At the moment there is fairly good agreement on cooler (but still warm) conditions by about the 21st but that is a very long way out, and you wouldn't bet against round 4 coming into view soon!

Long range ECM suggests a new Azores ridge pushing in again once the current heatwave gives way.  Though our window to achieve 40c is probably shrinking as the days become shorter. 

Plenty of time yet I would have thought - the 38.5 record in 2003 was in the second week of August, and the peak of the date records chart is around late July to mid August. I think the temperature lag more than outweighs the shorter days for a few weeks yet.

Yes, another 5 weeks or so where super-high temperatures are possible, I'd say - it's mid-August when things start to finally cool off, and by then we've lost another hour and three-quarters of daylight, the sun is noticably weaker and so forth. Mind you, considering it got to 35C on the 1st  and 2nd September 1906, it's presumably possible to get into the high 30s at least even that late in the year!

1976: 18 days of 30C+ from 22 June to 9 July. Score 79.1

2003: 10 days from 3-12 August. Score 48.4

2006: 14 days from 16 to 29 July. Score 47.3

1976 remains the pinnacle. An absurdly extreme event, especially given the global climate at the time. But 2006 and 2003 should be in our sights this month.

Score so far in this event: 4.7

Looking at the Synoptics I reckon you could add a couple of degrees to most days. So probably 37-38C at peak. Not a record because it didn’t have a deep Southerly fetch like 2022.

Edit: now 31.2C at Charlwood so we are hotter than July 8 1976, although this was the penultimate day of that record-breaking run back then.

On your scale, we have already had a heatwave in May scoring 16.5 and another in June scoring 32.2 before this one...