autumn Autumn 2016

[Nick L]

Just now, reef said:

The humidity is shocking again today. It seems to be a running theme this year, another 20C+ dewpoint (that's four times this summer) when its generally once or twice a decade.

Currently 26.9C with a dewpoint of 20.3C.

The September record max is 27.0C here too (since 1980), so that looks like it might go aswell.

I'm glad I'm not the only one who thinks this too. The relative lack of really hot days has been most welcomed, but it has seemed to have been a really humid year.

[Polar Maritime]

Yes not looking forward to sleeping tonight. I'm just glad I live out in the sticks and not in a City or built up area, It must be awful..

[Daniel*]

More of a dry heat in this part of the world not unbearable or unpleasant in the slightest but I'm rather good with heat, 31C and rising here nice to see people making the most of it.

Edited September 13, 2016 by Changing Skies.

[Nick L]

3 minutes ago, Changing Skies. said:

More of a dry heat in this part of the world to not unbearable or unpleasant in the slightest but I'm rather good with hear, 31C and rising here.

Dew points of 19-20c are hardly dry heat! Relatively humidity is a poor measure of the actual amount of moisture in the air.

50% RH at 30c is a far greater moisture content than 50% at 20c.

Edited September 13, 2016 by Nick L

[Nick L]

32.8c at Heathrow now. This is bloody madness!

[lassie23]

27 minutes ago, stainesbloke said:

For now, yes. Seem to be moving up the W half of the UK, the E mainly sunny and hot. 

Good, I'm painting lol

[March]

Making the most of this as I start a new job next week! A nice final week of sunny unemployment! Lol

[MP-R]

Meanwhile, it's 20C with scattered thunderstorms in Bristol. Get yourself over here if you don't like the heat. It's been loud and wet in the last few hours.

[Methuselah]

Taking extreme September heat-events in isolation, is there a pattern: 2016 -1961 = 55 = five Solar cycles? Does anyone know what September 1906 was like? Mr D?

[Matthew.]

32.8 Heathrow 1.35pm

[LetItSnow!]

2 minutes ago, Ed Stone said:

Taking extreme September heat-events in isolation, is there a pattern: 2016 -1961 = 55 = five Solar cycles? Does anyone know what September 1906 was like? Mr D?

September 1906 saw an exceptional heatwave with 35.6C on the 2nd.

[Nick L]

Remember that max temperatures at this time of year will probably occur earlier in the day than June/July thanks to the weaker sun. The sun is currently as high as it would at 4.30pm on the solstice.

Edited September 13, 2016 by Nick L

[Daniel*]

2 minutes ago, Nick L said:

Dew points of 19-20c are hardly dry heat! Relatively humidity is a poor measure of the actual amount of moisture in the air.

50% RH at 30c is a far greater moisture content than 50% at 20c.

Well speaking from my back yard, it is not humid I think the heats gets in folks heads. Compared to some days we've had with thick cloud those are always the worst, I suppose sleeping may be uncomfortable in London area, overnight temperatures are expected to go no lower than 18-20C which is fairly exceptional. Is there a reason why it seems to be more oppressive during the night? 

[Methuselah]

1 minute ago, LetItSnow! said:

September 1906 saw an exceptional heatwave with 35.6C on the 2nd.

Thank you. So we might have a pattern? But not if September 1851 had frost fairs!

[Nick L]

2 minutes ago, Changing Skies. said:

Well speaking from my back yard, it is not humid I think the heats gets in folks heads. Compared to some days we've had with thick cloud those are always the worst, I suppose sleeping may be uncomfortable in London area, overnight temperatures are expected to go no lower than 18-20C which is fairly exceptional. Is there a reason why it seems to be more oppressive during the night? 

At night is when relative humidity really does come into play. The dew points remain roughly the same but the temperature drops, which gives a smaller dew point depression (Temp - dew point). This means that the air is closer to saturation and sweat doesn't evaporate as readily.

[Man With Beard]

5 minutes ago, Matthew Wilson said:

32.8 Heathrow 1.35pm

Wow, wow, wow. 

So 2016 joins what must be an incredibly elite group of years where 33C has been recorded in 3 different months.

I bet there are no years at all with a 34C in three different months. Could this be the year? Perhaps another hour for Heathrow to get above 33.5C (which rounds up to 34C)

Down here... 26C atm - looked a bit thundery around midday but all cleared away now.

[cheese]

8 minutes ago, Nick L said:

Remember that max temperatures at this time of year will probably occur earlier in the day than June/July thanks to the weaker sun. The sun is currently as high as it would at 4.30pm on the solstice.

Eh, in my experience the max will still occur around 3-4pm even at this time of year.

[Nick L]

Just now, cheese said:

Eh, in my experience the max will still occur around 3-4pm even at this time of year.

I guess we'll soon find out! Looking back my logic probably was wrong come to think of it.

[No Balls Like Snow Balls]

6 minutes ago, Man With Beard said:

Wow, wow, wow. 

So 2016 joins what must be an incredibly elite group of years where 33C has been recorded in 3 different months.

I bet there are no years at all with a 34C in three different months. Could this be the year? Perhaps another hour for Heathrow to get above 33.5C (which rounds up to 34C)

Down here... 26C atm - looked a bit thundery around midday but all cleared away now.

 

The Met office don't round up or round down offical figures. 33.5c will be just that. 

[Nick L]

This is some east-west split for UK standards...

[MP-R]

3 minutes ago, Nick L said:

This is some east-west split for UK standards...

That's quite interesting, though it was still 21C here at 12pm, fell to 18.8C at 1pm following the storm, and is now beginning to rise again.

Heathrow's 32C is a world away from here at the moment!

[Nick L]

1 minute ago, MP-R said:

That's quite interesting, though it was still 21C here at 12pm, fell to 18.8C at 1pm following the storm, and is now beginning to rise again.

Heathrow's 32C is a world away from here at the moment!

Just to clarify, that time is in UTC, so 1pm BST!

[Summer Sun]

Kew gardens also at 32.8c

 

[cheese]

Was hoping to reach 30C here today given we have clear skies and almost no wind, but I doubt it will happen. Still very warm though.

[MP-R]

5 minutes ago, Nick L said:

Just to clarify, that time is in UTC, so 1pm BST!

And that explains all. Thanks for pointing that out!