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A term used in Northern Europe when the overnight low is 20C or warmer.
We all know the tropics have warmer nights.
It's too low imo. Here in Chicago we count number of lows above 70 degrees which is considered a warm night during the summer. But real tropical nights are lows above 75F degrees (24C) imo. At least those are normal lows in the southern US.
It's too low imo. Here in Chicago we count number of lows above 70 degrees which is considered a warm night during the summer. But real tropical nights are lows above 75F degrees (24C) imo. At least those are normal lows in the southern US.
It's the threshold because nights with a low over 20C are extremely rare in Northern Europe except for weather situations where very humid hot air comes in which may not happen at all in some summers (and in some areas like parts of the UK it may only be a once a decade or unheard of type phenomenon).
Even the record-breaking, hot summer of 2018 for example led to hardly any tropical nights for much of Central Europe and Scandinavia. Some warmer areas may have had a handful, some notoriously warm areas toward the Southern end of the region may have had 14-15 or so, but then of course in North America this is surpassed annually by almost any region east of the Rockies.
The warm summer nights in America were one of the first things that stood out to me when coming to America. In Europe, opening the windows at night is usually a sufficient method of cooling your place down and that's one of the reasons A/C never really caught on.
It's the threshold because nights with a low over 20C are extremely rare in Northern Europe except for weather situations where very humid hot air comes in which may not happen at all in some summers (and in some areas like parts of the UK it may only be a once a decade or unheard of type phenomenon).
Even the record-breaking, hot summer of 2018 for example led to hardly any tropical nights for much of Central Europe and Scandinavia. Some warmer areas may have had a handful, some notoriously warm areas toward the Southern end of the region may have had 14-15 or so, but then of course in North America this is surpassed annually by almost any region east of the Rockies.
The warm summer nights in America were one of the first things that stood out to me when coming to America. In Europe, opening the windows at night is usually a sufficient method of cooling your place down and that's one of the reasons A/C never really caught on.
We certainly had many stations with tropical nights in Norway in 2018, including a 25.2C low at Makkaur at 70 N at the Barents sea coast. It is however true most nights are well below 20C low.
None. Highest minima in my locality was 15.7°C on 25/6.. the preceding night into the 25th did remain above 17°C IIRC but the lower minima was due to cooler air being in place before the 26th as I record my data midnight-midnight
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