This summer just rolls on and on

[xmetman]

At 1200 UTC the temperature at Exeter airport was 19.0°C making it the joint warmest place in the British Isles.

That's also +2.2°C warmer than the same time yesterday, and also +0.3°C warmer than last Saturday!

I realise this is a different airmass, but it has not affected daytime temperatures here in the SW - the summer just rolls on - and all David Braine's warning of "how noticeably kooler" it will be doesn't count for much.

We are seven miles to the north of the airport and it's now 21.7°C at 1320 UTC and a lovely late summers afternoon.

Having said all that tonight could be very cool if the wind drops out, with a minimum as low as (((20-10)/2)-10 =) 5°C around here.

[Paul Kendall]

No for all. Max temp 14.4C here in High Wycombe. Cloudy all day with a good breeze.
Paul Kendall

[Paul Kendall]

I was at Cranfield Unversity for their 70th anniversary celebration. There was a planned flying display in the afternoon. A biter wind and cloudy base below 1000ft. Flying display much curtailed.
Paul Kendall

[xmetman]

Sorry Paul, just having a dig!

Apart from a cloudy Monday and some thundery rain on Tuesday its been OK this week in mid -Devon.

It never got overly hot so the cooler weather was less than a shock to the system as it must have been in your part of the world.

[John Hall]

It's remarkable that, less than 48 hours after Thursday's heat here in Surrey, I had to put the heating on for a short time first thing this morning. (Well I suppose I didn't have to, but it felt unpleasantly chilly when I got out of bed.)

[Paul Kendall]

I know how you feel John. I have been out all day today with bedroom windows opened. It felt very cold in the house when I got home.

When I left this morning my car thermometer registered 11C. Two days ago it registered 31C!

Paul Kendall

[Paul Garvey]

It's the SW where the summer is rolling on and on, boys! You can get your own back when you get the real UK heat!. Another sparkling morning, with a surprising 14C in Teignmouth. No wind makes it feel very pleasant, but it's one light fleece now to walk the dog! 

PS 'They' do, of course, say 'SW is Best'!😀😀😀

[Nick Gardner]

Yesterday (Saturday) was a lovely one 'ere with a maximum of 21.9°C and nearly 11 hours of sunshine.

And today is another bostin start with unbroken sunshine from dawn and warming up nicely now after a cool(ish) minimum of 9.6°C.

This month's sunshine levels are starting to clock up after what was a rather cloudy first week. Still has a long way to go to beat last year's September sunshine of 225 hours.

Every day so far this month has exceeded 20°C, today looks like continuing that.

--
Nick Gardner
Otter Valley, Devon
20 m amsl
http://www.ottervalleyweather.me.uk

[xmetman]

Nick

The same here in Bradninch a maximum of 21.9°C.

Rather disappointedly Exeter airport only reached 19.9°C (why is that place so cool in a NW'ly?) and Aboyne pipped them in the SYNOP observations.

Bruce.

╔═════════════════════════════════════════════════════╗

║           Highest Maximum Temperature [°C]          ║

║    0600 - 1800 UTC on Saturday, 17 September 2016   ║

║                    In WMO Block 03                  ║

╠═══╤═══════╤═════════════════════════╤═══════╤═══════╣

║ # │  WMO  │         Station         │   °C  │   °F  ║

╟───┼───────┼─────────────────────────┼───────┼───────╢

║ 01│ 03080 │Aboyne                   │  20.5 │  68.9 ║

║ 02│ 03857 │Isle Of Portland         │  20.3 │  68.5 ║

║ 03│ 03522 │Hereford                 │  20.1 │  68.2 ║

║ 04│ 03853 │Yeovilton                │  19.9 │  67.8 ║

║   │ 03844 │Exeter Airport           │  19.9 │  67.8 ║

║ 05│ 03529 │Pershore                 │  19.8 │  67.6 ║

║ 06│ 03628 │Filton                   │  19.6 │  67.3 ║

║ 07│ 03520 │Shobdon                  │  19.5 │  67.1 ║

║ 08│ 03797 │RAF Manston              │  19.4 │  66.9 ║

║   │ 03716 │St Athan                 │  19.4 │  66.9 ║

║ 09│ 03158 │Charterhall              │  19.3 │  66.7 ║

║ 10│ 03044 │Altnaharra               │  19.2 │  66.6 ║

║   │ 03230 │Redesdale                │  19.2 │  66.6 ║

║   │ 03238 │Albemarle                │  19.2 │  66.6 ║

║ 11│ 03796 │Langdon Bay              │  19.1 │  66.4 ║

║ 12│ 03896 │Jersey St Helier         │  19.0 │  66.2 ║

║   │ 03171 │RAF Leuchars             │  19.0 │  66.2 ║

║   │ 03063 │Aviemore                 │  19.0 │  66.2 ║

║ 13│ 03605 │Pembry Sands             │  18.9 │  66.0 ║

║ 14│ 03266 │RAF Linton-On-Ouse       │  18.8 │  65.8 ║

║   │ 03257 │RAF Leeming              │  18.8 │  65.8 ║

║ 15│ 03827 │Plymouth                 │  18.7 │  65.7 ║

║   │ 03062 │Tain Range               │  18.7 │  65.7 ║

║   │ 03609 │Mumbles                  │  18.7 │  65.7 ║

║ 16│ 03265 │Topcliffe                │  18.6 │  65.5 ║

║ 17│ 03507 │Sennybridge              │  18.5 │  65.3 ║

║   │ 03693 │Shoeburyness             │  18.5 │  65.3 ║

║ 18│ 03862 │Hurn Airport             │  18.4 │  65.1 ║

║   │ 03068 │RAF Lossiemouth          │  18.4 │  65.1 ║

║ 19│ 03746 │Boscombe Down            │  18.3 │  64.9 ║

║   │ 03707 │RAF Chivenor             │  18.3 │  64.9 ║

║   │ 03144 │Strathallan              │  18.3 │  64.9 ║

║   │ 03344 │Bingley                  │  18.3 │  64.9 ║

║   │ 03414 │RAF Shawbury             │  18.3 │  64.9 ║

║ 20│ 03305 │Capel Curig              │  18.2 │  64.8 ║

║   │ 03066 │RAF Kinloss              │  18.2 │  64.8 ║

║   │ 03895 │St Brelade               │  18.2 │  64.8 ║

╚═══╧═══════╧═════════════════════════╧═══════╧═══════╝

                 Data courtesy of OGIMET               

[Dick Lovett]

I wouldn't have said Exeter was unusually cool Bruce, just more representative of the true airmass temperature. It did, afterall, have the same max temperature as nearby Yeovilton. Back garden sites are always going to be susceptible to 'overheat' on sunny days with light winds.

Dick Lovett

[Len Wood]

My back garden site reached only 18.6C yesterday, looks like the same today.
Lovely sunshine though.
Could n't ask for more.
Lovely clear air in NW airstream and sunshine.


Len
Wembury, SW Devon coast, 83 m asl

[xmetman]

Dick

You're probably right.

But I'm still a great believer in a mini foehn effect that I think we might get from the hills that lie to the immediate north and northwest of Bradninch!

They are only 261 metres high but until someone releases a Vaisala sonde on a day similar to yesterday to prove to me otherwise I won't give up hope.

I was only thinking the other day of a Raspberry pie equipped with GPS, temperature and humidity sensors strapped to a bike to investigate the Clyst valley to see just how much cold drainage the airport got in a katabatic. You probably could do something similar and build one with a pressure sensor, fix it to a drone and send it up vertically to get a profile of the first 400 feet or so - the first reusable sonde!

Bruce.

[Paul Kendall]

The Met Office did at one time have re-usable Sondes. The old Mk? Sonde on the 60's. There was I a return label on them and if sent back the person finding it would get a reward. Probably 2/6 or something like that.
Paul Kendall

[Paul Garvey]

I've argued Fohn for Dawlish and Teignmouth's lack of rainfall in north-westerlies in the past. 

[Nick Gardner]

On Sunday, 18 September 2016 15:27:13 UTC+1, Dick Lovett wrote:

I wouldn't have said Exeter was unusually cool Bruce, just more representative of the true airmass temperature. It did, afterall, have the same max temperature as nearby Yeovilton. Back garden sites are always going to be susceptible to 'overheat' on sunny days with light winds. Dick Lovett

Dick, I wouldn't say that my 'back garden' is your typical one. I am surrounded by countryside in a wide-open, river valley setting. Not much shelter except natural ones, i.e., hills to the far west and east but exposed to the south and south-west and a little less exposed to the north. I doubt my garden 'overheats' as all the surrounding countryside would have to overheat as well.

And yet my temperatures are nearly always higher (minimums and maximums) than Exeter Airport.

[xmetman]

Yes Dartmoor shelters the south of Devon in any N or NW'ly just as it shelters mid-Devon in any SW'ly. There must be a foehn at work but I've never seen any meteorological paper written about it.

[Dick Lovett]

So the question is Nick, why are your maxima so often about a couple of degrees higher than Exeter on most sunny summer days, if as you say, you are not sheltered in any significant way. All the temperature climatological maps of Devon that I have seen show the Exeter area as being the'hot spot of Devon, rather than the Otter valley.

Dick

[Nick Gardner]

On Sunday, 18 September 2016 20:03:56 UTC+1, Dick Lovett wrote:

So the question is Nick, why are your maxima so often about a couple of degrees higher than Exeter on most sunny summer days, if as you say, you are not sheltered in any significant way. All the temperature climatological maps of Devon that I have seen show the Exeter area as being the'hot spot of Devon, rather than the Otter valley.

Dick, not being meterological person (but a scientist by profession) means that it is something that 'they' could answer but I can assure you my readings are accurate (Met Office sheathed minimum & maximum thermometers in Stevenson Screen with open exposure to a rural landscape). I think it has been said many times before, Devon seems to be a county of many 'climates'.

The locals 'round 'ere know that the area of hinterland from Exmouth to Seaton is drier, warmer and sunnier than places further inland. The biggest difference I see quite regularly is between here and Honiton which over the last few winters has had snow lying at some point whilst we here have had no snow even falling, let alone lying on the ground. The A30 northwards into the Blackdown Hills and mid-Devon seems to be a world away from here. Cullompton, Tiverton, Okehampton, Launceston are other examples: colder, duller and wetter - I know, I go to these places regularly and it feels like a different climate.