Another cool night in many places considering the temps yesterday and those forecast today. Pershore got down to 11C, quite incredible since the maximum there today will likely be in the upper 30s. A true continental climate at work in the UK!

Been fascinating to see the models trend toward a hotter Monday at expense of Tuesday only to reverse trend during the final 24 hours or so. The very hot airmass has arrived a little more slowly, allowing cooler min temps this morning.

The slower pace may also keep tonight from being quite as hot as it could or been, though still probably record-breaking in many spots.

In the meantime, temps should really shoot up today as surface heating initiates vertical convection which both warms and mixes out the surface inversion while bringing down air from above that has higher potential temperature.

I’m experiencing this event in northern Norfolk having managed to end up on a UK holiday during it all. A bit sad at missing the local hottest day on record back home while having to face even hotter conditions here (I’m not great with heat), but glad not to be having to try and work in my south-facing, zero air con office!

Hello everyone 

I’m new here.  Quite an interesting time to pop up!  (Having lurked for some time, Brian kindly created an id for me a while ago.)

One thing I’m wondering: is there any prospect of a new UK diurnal temperature variation record today?  I understand it’s currently 29.3°C, set at Altnaharra in December 1995 (I was in Ballater that night, certainly quite chilly).

It was down to 12.8° here (Herefordshire) last night, so not really low enough.  But if any of the possible 40° hot spots got down to around 10° last night, there must be a good chance.

Andrew

The lowest minima last night were 9.5C at Exeter airport at 10.2C at Topcliffe. Most potential hotspots got down to around 12-13C so I'd say it's fairly unlikely - but not far off!

Oh and welcome to TWO - you'll never leave 

Currently 22c

I just need to decide when to shut the west facing windows.

I've just shut all the windows and it seems to have instantly heated the house up rather than trapping the cool air. Unfortunately my "office" is a west-facing bedroom so it is going to get pretty hot later. Luckily I only have one Zoom meeting today and that is this morning.

I've still got all windows open but have started drawing the curtains in rooms which are facing the sun.

All windows now shut, curtains closed, and towels over the veluxes as makeshift blackouts. Fully immersed my shirt in cold water before putting it on! PWS up at 28C - it's a bit exposed; the true temp is about 1.5-2 degrees lower.

Thank you! 

If I may ask a quick question (the first of many, no doubt): how do you generate the synoptic data for a particular station (e.g. Heathrow), as you just posted in another thread?  Apologies for being slightly off-topic.

I took that from the Ogimet website which has tons of data stretching back years. 

You can generate the summaries on this page - you need the WMO code for the station but there is a link on that page to look them up.

Already 28c here!  Doncaster airport is showing that as well. 

Same here.

Incredible that Topcliffe was 10c last night, go out of the Vale of York up to 200m e,g Leeds/Bradford, here/Emley Moor and the minimum was 20c!  Warm air aloft to the extreme. 

"It's another excuse just like Covid, people just want to stay at home... we're opening the floodgates for all the snowflakes"

Charlie Mullins says he would sack anyone who asked to work from home during a heatwave.@CharlieM_OBE | @ClaudiaLizaTV | #JeremyVine pic.twitter.com/QFLpqDY2TB

— Jeremy Vine On 5 (@JeremyVineOn5) July 18, 2022

I'm currently on the bus to Hawick and just leaving Edinburgh where it's already 25°C according my phone app.

It's clearly going to be a hot one today and that same app is even forecasting 30°C for here today which would already give us our hottest day of this year so far by quite a considerable amount.

"It's for two days, it's called Summer... the whole country has become snowflakes"

Andy from West Sussex believes the UK should embrace the heat and doesn't need to be told how much water to drink or how to stay safe.@Kevin_Maguire | @MelanieBlakeUK | @AliMirajUK | #JeremyVine pic.twitter.com/BKSP8XLFKr

— Jeremy Vine On 5 (@JeremyVineOn5) July 18, 2022

Lineker weighs in on the debate

Being reminded of that local heatwave in 1976. It’s gone global in 2022. pic.twitter.com/HsDe9Z2kZT

— Gary Lineker 💙💛 (@GaryLineker) July 18, 2022

38.5C today and 40.7C tomorrow look like reasonable guesses.