LeedsLad123
13 August 2022 14:25:40

Originally Posted by: Ally Pally Snowman 


Ireland had its hottest ever August day yesterday 31.7c in Oak Park County Carlow.


 


 https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.bbc.co.uk/news/uk-northern-ireland-62517335.amp&ved=2ahUKEwiYqvnJmMP5AhWkoVwKHQWiDYAQFnoECAcQAQ&usg=AOvVaw33yq-MCWZY_CQqJGjIJMer


 



Sometimes I forget just how low Ireland’s record temperatures are 


Whitkirk, Leeds - 85m ASL.
JHutch
13 August 2022 15:33:00

Going overseas


New record for Ibiza airport. Apparently a new Balearics record of 44.5C st at Formentera. A little curious about the Formentera temperature but aemet seem happy.


https://twitter.com/AEMET_Baleares/status/1558471843975249927


 


New August record set at Brest (Brittany) of 36C. Would be an all-time record if it wasnt for the heatwave last month where 39.3 was recorded.


https://twitter.com/MeteoBretagne/status/1558476179891421185

Rob K
13 August 2022 20:25:59
Not sure if Charlwood hit 35.0 or 34.9. Seen conflicting reports.
Yateley, NE Hampshire, 73m asl
"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome
doctormog
13 August 2022 20:31:22

Originally Posted by: Rob K 

Not sure if Charlwood hit 35.0 or 34.9. Seen conflicting reports.


I think the SYNOPS data has it at 34.9°C.


TimS
  • TimS
  • Advanced Member Topic Starter
13 August 2022 21:32:08

Originally Posted by: picturesareme 

Wasn't worth making a thread for this but whilst it's still 23.5C outside at 2.15am I was looking into cold summer nights and oddly most have happened in the past 50 year's.

15/31 of the coldest July night's on record have happened in the last 50 year's.

20/31 of the coldest August nights have happened in the last 50 year's.


Thats very interesting. Hard to think of a reason why: the climate overall has warmed, there are if anything fewer frost pockets in the reporting network than in the early 20th century, and although urbanisation has declined (or rather urban areas have become more leafy) there have always been deep rural sites. 


When were the cold nights, a particular period or scattered across the 50 years?


Brockley, South East London 30m asl
Bolty
13 August 2022 21:59:57
Another fantastic late summer's day. 30.7°C here today:


Scott
Blackrod, Lancashire (4 miles south of Chorley) at 156m asl.
My weather station 
picturesareme
13 August 2022 23:17:03

Originally Posted by: TimS 


 


Thats very interesting. Hard to think of a reason why: the climate overall has warmed, there are if anything fewer frost pockets in the reporting network than in the early 20th century, and although urbanisation has declined (or rather urban areas have become more leafy) there have always been deep rural sites. 


When were the cold nights, a particular period or scattered across the 50 years?



They were generally scattered but more clustered around the 80/90's. 

Jerry P
14 August 2022 07:34:04

Originally Posted by: TimS 


 


Thats very interesting. Hard to think of a reason why: the climate overall has warmed, there are if anything fewer frost pockets in the reporting network than in the early 20th century, and although urbanisation has declined (or rather urban areas have become more leafy) there have always been deep rural sites. 


When were the cold nights, a particular period or scattered across the 50 years?



Just a guess but would were readings over 50 years ago based on mercury thermometers meaning less accurate absolute minimums?  Low temps in frost hollows might occur only for a few minutes leaving mercury too slow to respond and also not recording to 10ths of a degree.  Again, speculation on my part!


West Somerset, 103m asl
lanky
14 August 2022 07:37:43

Originally Posted by: picturesareme 

Wasn't worth making a thread for this but whilst it's still 23.5C outside at 2.15am I was looking into cold summer nights and oddly most have happened in the past 50 year's.

15/31 of the coldest July night's on record have happened in the last 50 year's.

20/31 of the coldest August nights have happened in the last 50 year's.


What dataset is that based on ?


When I tried it for the daily CET for July minima under 7C I got 10 out of 52 in the past 50 years (since 1972)  and 42 out of 52 pre 1972 which is what I would have expected to see


 


Martin
Richmond, Surrey
johncs2016
14 August 2022 07:40:51

Originally Posted by: Rob K 

Not sure if Charlwood hit 35.0 or 34.9. Seen conflicting reports.


It probably depends on whether these temperatures are reported to the nearest 0.1°C or to the nearest 1°C.


34.9°C as reported to the nearest whole °C is 35°C so even if the actual value is 34.9°C, it is not actually technically incorrect to see that written as 35°C if we are only reporting that to the nearest 1°C.


 


The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
doctormog
14 August 2022 07:43:46

Originally Posted by: johncs2016 


 


It probably depends on whether these temperatures are reported to the nearest 0.1°C or to the nearest 1°C.


34.9°C as reported to the nearest whole °C is 35°C so even if the actual value is 34.9°C, it is not actually technically incorrect to see that written as 35°C if we are only reporting that to the nearest 1°C.


 



Yes, however that is not what Rob was asking. He asked if it was 34.9 or 35.0 and not 34.9 or 35°C.


johncs2016
14 August 2022 07:48:02

Originally Posted by: doctormog 


 


Yes, however that is not what Rob was asking. He asked if it was 34.9 or 35.0 and not 34.9 or 35°C.



In that case, it might be possible to check that at somewhere like ogimet.com or weatherobs.com if that is a major station (even if that is one with a prefix which starts with 99 rather than 03, that might still show up at weatherobs.com).


That would then help to remove any confusion and clarify the situation.


EDIT:


I've just did that check myself and according to Meteomanz, Charlwood is a major station with a WMO code of 03769, so it should send out detailed SYNOP/BUFR codes similar to what goes out from Gogarbank here in Edinburgh.


Yesterday's maximum temperature was sent as part of the raw SYNOP code that station for 18z, and went out again as part of the 21z raw SYNOP code.


That raw SYNOP code shows that yesterday's maximum temperature at Charlwood was actually 35.0°C even to the nearest 0.1°C, and not 34.9°C.


 


 


The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
Chidog
14 August 2022 07:51:58
Temperatures rising quickly this morning. Definitely looks the best chance for a 35C if it stays clear all day
doctormog
14 August 2022 07:53:35

Originally Posted by: johncs2016 


 


In that case, it might be possible to check that at somewhere like ogimet.com or weatherobs.com if that is a major station (even if that is one with a prefix which starts with 99 rather than 03, that might still show up at weatherobs.com).


That would then help to remove any confusion and clarify the situation.


 



I had done before posting, although somewhat ironically it has been update to 35.0°C since then.  The SYNOP report below is for Charlwood.


202208132100 AAXX 13214 03769 05984 00301 10214 20090 30040 40118 55000 60002 80/// 333 10350 20214 55300 20000 60005 91002 90710 91114=

Ally Pally Snowman
14 August 2022 08:02:28

Originally Posted by: Chidog 

Temperatures rising quickly this morning. Definitely looks the best chance for a 35C if it stays clear all day


Indeed 26c already at my nearest WS Stansted. 


Bishop's Stortford 85m ASL.
johncs2016
14 August 2022 08:03:59

Originally Posted by: doctormog 


 


I had done before posting, although somewhat ironically it has been update to 35.0°C since then.  The SYNOP report below is for Charlwood.


202208132100 AAXX 13214 03769 05984 00301 10214 20090 30040 40118 55000 60002 80/// 333 10350 20214 55300 20000 60005 91002 90710 91114=


That's weird since I've never known of any raw SYNOP data to be altered at such short notice, or even at all.


I guess that it that can happen at Charlwood, it can also happen at somewhere like Edinburgh Gogarbank as well, so that is something else to look out for when I'm compiling my own monthly or seasonal statistics for there, as these changes can add up to quite a significant difference in those actual statistics if this was to happen on a regular enough basis.


 


The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
doctormog
14 August 2022 08:07:26
It was the difference between the max reported on the 6pm report and the 9pm rather than an actually change of the original report. I doubt if the max occurred that late but the data may not have been available by 6pm.
johncs2016
14 August 2022 08:23:37

Originally Posted by: doctormog 

It was the difference between the max reported on the 6pm report and the 9pm rather than an actually change of the original report. I doubt if the max occurred that late but the data may not have been available by 6pm.


It's good that we have those 21z (and 09z) reports though.


That is something which was only fairly recently added to the available data from ogimet/Meteomanz whereas previously, you only got the minimum temperatures at 06z and the maximum temperatures at 18z from that data, whereas the official observation day as defined by the UK Met Office is usually from 09:00 UTC (which is either 9am GMT or 10am BST depending on the time of year) on one day to 09:00 UTC on the next day.


Because of that, I would probably say that the minimum temperature as obtained from the 09z report along with the maximum temperature as obtained from the 21z report are probably more likely to be in line with the values for that, which are then officially recorded and reported by the Met Office (although I could well be wrong there of course).


 


The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
The Beast from the East
14 August 2022 08:27:03

Originally Posted by: Chidog 

Temperatures rising quickly this morning. Definitely looks the best chance for a 35C if it stays clear all day


Last night was perhaps the most uncomfortable of the summer, felt worse that last month, perhaps because the humidity is rising. Will be a welcome relief when this ends now


 


"We have some alternative facts for you"
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Caz
  • Caz
  • Advanced Member
14 August 2022 08:38:15

Originally Posted by: Chidog 

Temperatures rising quickly this morning. Definitely looks the best chance for a 35C if it stays clear all day

Overnight temps were higher here last night, so we have a warmer start. 


Market Warsop, North Nottinghamshire.
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