Summer 2015

[Sainsbo]

Definitely wasn't expecting it to be quite this hot!

 

Wonder if we'll hit 37C, or is that just being greedy?

 

 

This also makes it the joint 3rd hottest day in the UK ever

Edited July 1, 2015 by Sainsbo

[seabreeze86]

That is amazing its a whole 20c colder here at 16.4, the bloody north sea

[cheese]

Agreed. The 35C heat seems very localised in London, surely the UHI has pushed it over.

Highly doubt it - the UHI has a minimal impact on daytime temperatures - and similar temperatures were reached in Norfolk. London is just located in the hottest area of the country usually.

 

Either way, it's roasting up here too.

[Summer Sun]

Hottest day ever at Wimbo

 

Kew Gardens (nearest observation site) has recorded a temperature of 35.7°C

[Backtrack]

Will summer 2015 be remembered as having the hottest July temperature ever? Or can a plume reload go one step further and go for gold and challenge the all time record?!

[Relativistic]

It appears temperatures have dropped again:

http://www.netweather.tv/index.cgi?action=current;type=maxt

[Interitus]

Highly doubt it - the UHI has a minimal impact on daytime temperatures

That's actually not true, research shows that typically when averaged out the UHI effect is greater with insolation in summer rather than anthropogenic heat released in winter, and throughout the course of the day is lowest around midday before building up during the afternoon. Looking at the temperatures and dew points on xcweather for example shows the higher temperatures at Northolt and Heathrow are coupled with lower dew points than surrounding areas which suggests that something is causing extra heating eg insolation on roads and buildings, and possibly less evapotranspiration from soil and vegetation.

Edited July 1, 2015 by Interitus

[Methuselah]

I don't think Friday and Saturday will be hot enough, but honestly, knowing that the models completely underestimated this heat wave... I actually don't know! Possibly.

Judging from the past week, it might be a safe bet adding 2C to the MetO predictionss; so still potentially rather toasty!

[Milhouse]

I always thought that we were capable of something approaching record breaking today. Uppers around 20c dont just deliver bog standard plumes just touching 30c.

[cheese]

That's actually not true, research shows that typically when averaged out the UHI effect is greater with insolation in summer rather than anthropogenic heat released in winter, and throughout the course of the day is lowest around midday before building up during the afternoon. Looking at the temperatures and dew points on xcweather for example shows the higher temperatures at Northolt and Heathrow are coupled with lower dew points than surrounding areas which suggests that something is causing extra heating eg insolation on roads and buildings, and possibly less evapotranspiration from soil and vegetation.

Okay - but Heathrow doesn't have much of an urban heat island to begin with - it's on the edge of London. Northolt isn't central either - it's north London. Why would Heathrow be hotter than Kew Gardens or London City Airport despite the latter two being considerably more urban in nature? Ditto the old London Weather Centre which was often a couple of degrees down on Heathrow's values when it was open.

[Nick L]

Still 30c at half 7, crazy.

[The PIT]

I always thought that we were capable of something approaching record breaking today. Uppers around 20c dont just deliver bog standard plumes just touching 30c.

Imagine what it would have been like if the overnight temps hadn't fallen some 7c lower than predicted values. A 17.4c range today which is pretty impressive.

[I remember Atlantic 252]

better day forecast for me tomorrow, bbc 20C max, GFS 19C max

[The PIT]

Judging from the past week, it might be a safe bet adding 2C to the MetO predictionss; so still potentially rather toasty!

Been adding 3c to 5c on top of predicted values been pretty much bang on...

[Snowyowl9]

Will summer 2015 be remembered as having the hottest July temperature ever? Or can a plume reload go one step further and go for gold and challenge the all time record?!

It will be remembered for being the least thundery the way its going on.

[Methuselah]

It will be remembered for being the least thundery the way its going on.

It's only the 1st!

[Methuselah]

From now on, July 1st can be officially called Betty Swollocks' Day!

[Snowyowl9]

It's only the 1st!

If that was may or june 1st I`d be much more optimistic.

[damianslaw]

One day of extreme heat doesn't make a summer. Its been a cool affair so far coming on the back of a disappointing May, so there is much room for improvement. However, there is a good 2 and half months at least yet to go and in an average year the core warm period of the year in second half of July and first third of August.

 

Today will go down as an oddity given the predicted significant drop in temps forecast tomorrow, and especially go against the recent background, a jump in the maxima of 6 degrees from one day to the next is very notable. Our high maxima figures tend to have come on the back of gradual warming think July 06 and Aug 03 for example where we seen a few days of temps in the high 20'slow 30's before we hit the 36 degree mark. Its make today all the more special for it.. have to say I am surprised how high temps got today. The perfect plume for high temps.

 

Its encouraging sign to see the trough coming unstuck to our west, I wouldn't be surprised to see further plumes occur this summer but getting them to align in similar position quite tricky..

[March Blizzard]

June 1st came in at 9.5C in the CET zone, it'll be interesting to see the difference between it and July 1st.

Substantial is an understatement...

[Timmytour]

Posted this a few days ago in another thread...

 

Could this month join a select band of July days, 8 in the last 250 years, in which a daily mean CET tops 24C?

So far we have... 1808(x2) 1852, 1923, 1948, 1976(x2) and 2006.

The only other three occasions came during the first three days of August...once in 1990 and twice in 1995

 

    

It gave it a good go today  I reckon!     

Edited July 1, 2015 by Timmytour

[March Blizzard]

Just had my dream summer's day today! A 34C, mostly sunny day followed by an absolute belter of a thunderstorm, with near-constant lightning.

 

Thank you weather gods!

34C?? That seems a little high. According to Diane on BBC weather tonight the hotspot in our region was Rochdale at 31C...

[March Blizzard]

Well that's what the thermometer in my garden was showing. Not official obviously, but does show local variation.

 

https://twitter.com/ScottRichards97/status/616247765618819072

Not saying you're lying by any means, Scott! I just thought it looked a little high is all.

I suppose you aren't too far from Rochdale, so you may well have been the warmest place in the NW today.

[Daniel*]

Boo. Sustained spells like 90 and 06 are far more deserving of record breaking.

I disagree the uppers were on level to 2003 record breaking about 22C touching south coast it goes to show and provides a important lesson to many who doubted the longevity of the plume would consequently result in something anaemic. If 20C 850's persisted blanketing the SE the record would have been smashed without doubt potentially reaching 40C. I have an idea that past few months have been dry, causing the ground to harden, this then results in emphasised heat being absorbed and then radiated as water has higher specific heat capacity. It takes more energy to rise the temperature.

[reef]

Its a shame this spell wasnt more of a light southerly as opposed to a south-easterly. The uppers are right up there but the onshore breeze has meant temperatures within 20-30 miles of the coast have been lower than otherwise.

It makes you realise how exceptional 3rd August 1990 was when areas this far north recorded 34-36C. The 36C+ area was much more widespread back then aswell.