Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
I've never heard the term 'tropical night' used in Britain, and as far as I am aware no records are kept of numbers of nights exceeding any particular temperature threshold. In Korea though the threshold is apparently 25C:
As for where I live, I don't think I even need to bother looking up the records to be able to say that it's never happened here, but a low of 20C (rounded, so might have been a 19.5 etc) has happened in Manchester at least once, which is no more than about 50 miles away.
I've just looked at August 1987 and apparently the low was 20.7C on the 20th in Leeds. It looks a little dodgy though. I'll keep my reservations for now.
Last edited by dunno what to put here; 05-18-2014 at 01:53 PM..
Other than the fact that your location is above 50N, I assume that most of the heat that reaches Northern Europe is not accompanied by high dew points. The higher the dew point, the higher the minimum temps...
We had some brutally hot maximum temps during the 1930's and also during the summer of 1988, but those were drought summers. Lower dew points, lower minimums
Quote:
Though temperatures recorded at Midway Airport in July 1934 featured 13 days with highs of 90 degrees or higher, including a string of six 100s topped by the sizzling 109-degree high on July 23, that month ranks only as the 16th hottest July there dating back to 1928. The summer of 1934 was during the heart of the Dust Bowl when heat and drought gripped much of the Plains and Midwest, and lower dew points allowed overnight temperatures to drop into the 60s and even the 50s on several occasions. As a result, the month's average temperature of 77.6 degrees, while still well above normal, was far below the 81.3 degree average temperature recorded in July 1955, July 1999 and August 1995, Midway's hottest months on record.
Other than the fact that your location is above 50N, I assume that most of the heat that reaches Northern Europe is not accompanied by high dew points. The higher the dew point, the higher the minimum temps...
It's hard to get high minimums here - heatwaves are usually clear with low humidity and little rain, so the temperature falls quickly after the sun goes down. On our hottest day ever, the high was 34.4C, and the low 17.8C. Average humidity on that day was 45%.
I've just looked at August 1987 and apparently the low was 20.7C on the 20th in Leeds. The low at Church Fenton on the same date was 18.6C, so it looks legit. I must have overlooked it as a mean or max temp. How unusual that we get out highest ever min temp in one of our coolest summers in the past 30 years.
How strange - I'd never heard anything about that. Bingley had a low of 16.6C on the 20th and 21st of that month, so over 4C warmer in Leeds is pushing it a bit, but plausible.
Edit - WOW! We had a low of 20.8C on 3 August 1990!, and then the high the next day was only 20C and it didn't even get that warm again for weeks...
I have to assume that is accurate, but in all the other hot months I've cherrypicked to have a look at I can't find anything else above 17s. I don't see how a station halfway up a hill with fields all around it can ever be 1.4C milder than the centre of Leeds the same night though when it was 2-3C colder during the day as you'd expect?
In Norway we use this term ("Tropenatt") when the minimum during the night is 20C or more. It does happen from time to time but is rare.
It happened last summer here, the night before 29. July 2013, when Trondheim-Værnes had a minimum of 21.8C / 71.2F, and Kvithamar (nearby) a minimum of 20.5C. The very short summer nights does help Tropenatt i Stjørdal - NRK
The warmest minimum in Norway was 25.5C / 77.9F at Halden (S of Oslo) 9. July 1933.
Second warmest was 25C at Sunndalsøra (SW of Trondheim) 29. August 1997.
Third warmest was 24.7C at Grøtøy in Steigen (E of Lofoten) 1. July 1972. This is 200 km north of the Arctic Circle
Maybe even more remarkable was the night 30.July 1960, when Makkaur lighthouse, on the Arctic Finnmark Barents sea coast at nearly 71N had a minimum of 24.2C /75.6F
How strange - I'd never heard anything about that. Bingley had a low of 16.6C on the 20th and 21st of that month, so over 4C warmer in Leeds is pushing it a bit, but plausible.
Edit - WOW! We had a low of 20.8C on 3 August 1990!, and then the high the next day was only 20C and it didn't even get that warm again for weeks...
I have to assume that is accurate, but in all the other hot months I've cherrypicked to have a look at I can't find anything else above 17s. I don't see how a station halfway up a hill with fields all around it can ever be 1.4C milder than the centre of Leeds the same night though when it was 2-3C colder during the day as you'd expect?
I guess it's possible, even if it's extremely weird. Leeds Bradford had a low of 19C on the same night. I would have expected the centre of Leeds to be a lot warmer.
Maybe even more remarkable was the night 30.July 1960, when Makkaur lighthouse, on the Arctic Finnmark Barents sea coast at nearly 71N had a minimum of 24.2C /75.6F
Already had a minimum of 20C here in Malta on May 13th...
Back in the UK in Portsmouth I used to record at least one night a year with a minimum of around 19C/20C & sometimes a little higher too, during the 2003 heatwave I recorded a low of 24C (on the same night Solent MRSC recorded a low of 21.8C).
Last summer I recorded one night with a minimum of 20C, 3 with a minimum of 19C & 6 with a minimum of 18C. The warmest minimum at Solent MRSC last summer was 18.1C...
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.
Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
It looks a little dodgy though. I'll keep my reservations for now.
, and then the high the next day was only 20C and it didn't even get that warm again for weeks...
