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Post by Doña Jimena on Jun 21, 2021 2:48:23 GMT -5
23.3C is the minimal temperature last night in Riga. Lows in Latvia:  |
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Post by Babu on Jun 21, 2021 3:49:06 GMT -5
A very warm night in Finland with a dozen stations recording >20'C lows. Warmest of the bunch was the Tampere UHI station (which I'm very curious to tp the exact location of), with 21.9'C. The very reasonable Tampere Harmala station (comparable to Bromma airport for Stockholm) still managed a 20.6'C low.
Sweden topped out at a meekly 19.6'C at Fårösund (Gotland island) and Gotska Sandön (islet close to Gotland), 19.5'C at Karlskrona, and 19.3'C at Stockholm UHI (18.6'C at Bromma).
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Post by dunnowhattoputhere on Jun 21, 2021 5:34:50 GMT -5
It always amazes me how (comparatively) easily Scandinavia and the Baltic states record 20C lows. In my almost 34 years of existence I've probably experienced >20C lows just two or three times here. Even on days where the high temp has been say 33C or 34C, the low the following morning will still only be 17C or 18C, and that's with a significant UHI. The temperature just tumbles away rapidly after about 11pm regardless of how hot it was during the day.
For reference, the last >20C low here was on 26 July 2019 after a high of 35C. That's what it takes to get a tropical night in this part of the world. By contrast on 31 July 2020, it reached 34C and fell to 15C the following morning - if that was in Stockholm or Helsinki I bet the low would be around 21C, if not higher.
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Post by Babu on Jun 21, 2021 5:56:09 GMT -5
It always amazes me how (comparatively) easily Scandinavia and the Baltic states record 20C lows. In my almost 34 years of existence I've probably experienced >20C lows just two or three times here. Even on days where the high temp has been say 33C or 34C, the low the following morning will still only be 17C or 18C, and that's with a significant UHI. The temperature just tumbles away rapidly after about 11pm regardless of how hot it was during the day. For reference, the last >20C low here was on 26 July 2019 after a high of 35C. That's what it takes to get a tropical night in this part of the world. By contrast on 31 July 2020, it reached 34C and fell to 15C the following morning - an almost 10C drop. Hard to point out any single reason, or know for sure which possible reasons there are. The baltic sea tends to get significantly warmer SST's in summer compared to the Atlantic and English Channel, that's surely one factor. This, along with the density of lakes as well as the summer peak in rainfall, could contribute to higher dew points during heatwaves. Sweden, for example, has been seeing widespread 20'C dew points recently, even away from the coast. What we saw last night in Finland was moderate wind speeds even in the middle of the night. This was obviously the reason their temps didn't drop as much despite the clear skies (lows were 5'C above the dew point even at non-UHI stations). No idea if this is more typical in Finland than in England though. Longer daylight also helps a bit obviously, although this doesn't seem to play that much of a roll, at least in Sweden, until you actually approach the arctic. Edit: Some actual SST stats "Knoll's Shallows", a buoy right in the middle of the sea between Gotland Island (the largest island) and the mainland, which opened in Nov 2011, has an average SST of 13.6, 17.4, 18.7 and 16.0 for June, July, August and September. The average maximum temp for each month is 18.2, 21.5, 21.7 and 18.7. In Aug 2018, the buoy recorded a SST of 26.8, and this is a buoy about 50km from the coast. I'm sure those SST's are possible on English beaches, but I doubt the English channel ever gets much warmer than 20'C SST's 50km away from the coast. Also worth noting that pretty much all of Fennoscandia is warmer than Leeds in the peak of summer on average, on top of having more variability, which makes sense since GB is a large oceanic island. |
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Post by Babu on Jun 21, 2021 6:58:39 GMT -5
We've had very fortunate weather lately here in Umeå...  A bunch of other Nordic stations for reference: Stockholm:  Norrköping:  Fårösund on Gotland island  Öland's northern edge, a little further south.  Porvoo in Finland, a bit east of Helsinki:  Vöru in Estonia:  Riga (21st not included)  Nida, on the west coast of Lithuania. Very impressive lows! (21st not included)  Cucklo, the Norwegian capital:  Cuckheim, I think Nidaros may have passed away.  |
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Post by Doña Jimena on Jun 21, 2021 7:11:58 GMT -5
It always amazes me how (comparatively) easily Scandinavia and the Baltic states record 20C lows. In my almost 34 years of existence I've probably experienced >20C lows just two or three times here. Even on days where the high temp has been say 33C or 34C, the low the following morning will still only be 17C or 18C, and that's with a significant UHI. The temperature just tumbles away rapidly after about 11pm regardless of how hot it was during the day. Those tropical nights are recorded primarily in coastal locations. Leeds is located on hills, far from the sea, so it does not surprise me. Liverpool must have much higher lows than Leeds, I am pretty sure. |
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Post by Babu on Jun 21, 2021 7:27:13 GMT -5
It always amazes me how (comparatively) easily Scandinavia and the Baltic states record 20C lows. In my almost 34 years of existence I've probably experienced >20C lows just two or three times here. Even on days where the high temp has been say 33C or 34C, the low the following morning will still only be 17C or 18C, and that's with a significant UHI. The temperature just tumbles away rapidly after about 11pm regardless of how hot it was during the day. Those tropical nights are recorded primarily in coastal locations. Leeds is located on hills, far from the sea, so it does not surprise me. Liverpool must have much higher lows than Leeds, I am pretty sure. In Sweden and Norway they're mostly coastal, but Finland and the Baltics regularly record 20'C lows even in the far inland. In Finland's case it's often stations surrounded by lakes, sure, but not in the Baltics. |
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Post by ilmc90 on Jun 21, 2021 8:13:25 GMT -5
Muggy morning with a temperature of 77 F/25 C and a dewpoint of 72 F/22 C at 9AM. Forecast high of 90 F/32 C but turning much cooler tomorrow with a high of only 71 F/22 C.
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Post by Doña Jimena on Jun 21, 2021 8:27:13 GMT -5
Those tropical nights are recorded primarily in coastal locations. Leeds is located on hills, far from the sea, so it does not surprise me. Liverpool must have much higher lows than Leeds, I am pretty sure. In Sweden and Norway they're mostly coastal, but Finland and the Baltics regularly record 20'C lows even in the far inland. In Finland's case it's often stations surrounded by lakes, sure, but not in the Baltics. Those lows above 20C do happen less often in inland locations here. There are lakes in eastern Latvia, but they are tiny compared to Finland. In any case, I find eastern Sweden extremely continental and I am surprised by temperatures there. |
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Post by FrozenI69 on Jun 21, 2021 10:40:40 GMT -5
23.3C is the minimal temperature last night in Riga. Lows in Latvia: Looks sticky and uncomfortable. I hate hot nights, they really annoy me. Madona's 16.4 C is quite nice, I'll take that. |
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Post by nei on Jun 21, 2021 11:03:21 GMT -5
88.5F on the coast of the Arctic Ocean, must feel nice up there
June record is 34.3°C last year!
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Post by rozenn on Jun 21, 2021 11:25:04 GMT -5
About to take off for Marseilles. Looks like I'm in for a bumpy ride.   |
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Post by dunnowhattoputhere on Jun 21, 2021 12:05:28 GMT -5
It always amazes me how (comparatively) easily Scandinavia and the Baltic states record 20C lows. In my almost 34 years of existence I've probably experienced >20C lows just two or three times here. Even on days where the high temp has been say 33C or 34C, the low the following morning will still only be 17C or 18C, and that's with a significant UHI. The temperature just tumbles away rapidly after about 11pm regardless of how hot it was during the day. For reference, the last >20C low here was on 26 July 2019 after a high of 35C. That's what it takes to get a tropical night in this part of the world. By contrast on 31 July 2020, it reached 34C and fell to 15C the following morning - an almost 10C drop. Hard to point out any single reason, or know for sure which possible reasons there are. The baltic sea tends to get significantly warmer SST's in summer compared to the Atlantic and English Channel, that's surely one factor. This, along with the density of lakes as well as the summer peak in rainfall, could contribute to higher dew points during heatwaves. Sweden, for example, has been seeing widespread 20'C dew points recently, even away from the coast. What we saw last night in Finland was moderate wind speeds even in the middle of the night. This was obviously the reason their temps didn't drop as much despite the clear skies (lows were 5'C above the dew point even at non-UHI stations). No idea if this is more typical in Finland than in England though. Longer daylight also helps a bit obviously, although this doesn't seem to play that much of a roll, at least in Sweden, until you actually approach the arctic. Edit: Some actual SST stats "Knoll's Shallows", a buoy right in the middle of the sea between Gotland Island (the largest island) and the mainland, which opened in Nov 2011, has an average SST of 13.6, 17.4, 18.7 and 16.0 for June, July, August and September. The average maximum temp for each month is 18.2, 21.5, 21.7 and 18.7. In Aug 2018, the buoy recorded a SST of 26.8, and this is a buoy about 50km from the coast. I'm sure those SST's are possible on English beaches, but I doubt the English channel ever gets much warmer than 20'C SST's 50km away from the coast. Also worth noting that pretty much all of Fennoscandia is warmer than Leeds in the peak of summer on average, on top of having more variability, which makes sense since GB is a large oceanic island. All good points. The ridiculous number of lakes in Finland and Sweden is something I never really considered. |
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Post by Ariete on Jun 21, 2021 12:11:21 GMT -5
Violent thunderstorms in Oulu this afternoon. One person has died when a tree fell on her. A shopping centre was evacuated due to flash flooding. The highest gust recorded in Oulu harbour was 31.3 m/s (112.7 km/h).
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Post by Babu on Jun 21, 2021 12:21:32 GMT -5
Hard to point out any single reason, or know for sure which possible reasons there are. The baltic sea tends to get significantly warmer SST's in summer compared to the Atlantic and English Channel, that's surely one factor. This, along with the density of lakes as well as the summer peak in rainfall, could contribute to higher dew points during heatwaves. Sweden, for example, has been seeing widespread 20'C dew points recently, even away from the coast. What we saw last night in Finland was moderate wind speeds even in the middle of the night. This was obviously the reason their temps didn't drop as much despite the clear skies (lows were 5'C above the dew point even at non-UHI stations). No idea if this is more typical in Finland than in England though. Longer daylight also helps a bit obviously, although this doesn't seem to play that much of a roll, at least in Sweden, until you actually approach the arctic. Edit: Some actual SST stats "Knoll's Shallows", a buoy right in the middle of the sea between Gotland Island (the largest island) and the mainland, which opened in Nov 2011, has an average SST of 13.6, 17.4, 18.7 and 16.0 for June, July, August and September. The average maximum temp for each month is 18.2, 21.5, 21.7 and 18.7. In Aug 2018, the buoy recorded a SST of 26.8, and this is a buoy about 50km from the coast. I'm sure those SST's are possible on English beaches, but I doubt the English channel ever gets much warmer than 20'C SST's 50km away from the coast. Also worth noting that pretty much all of Fennoscandia is warmer than Leeds in the peak of summer on average, on top of having more variability, which makes sense since GB is a large oceanic island. All good points. The ridiculous number of lakes in Finland and Sweden is something I never really considered. For Sweden it's moreso the fact that most towns of significant size are either by the sea or by a lake or inlet, rather than the lakes having a noticable effect on the dew point over a large area. Finland however does have enough proportional lake area to noticably affect a large area. |
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Post by Met.Data on Jun 21, 2021 12:45:48 GMT -5
I think I'd enjoy a summer in southern Finland or Sweden these days. Much sunnier and more consistent warmer weather than the UK, and apparently proper even severe thunderstorms as well.
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Post by Doña Jimena on Jun 21, 2021 14:07:40 GMT -5
Looks sticky and uncomfortable. I hate hot nights, they really annoy me. Madona's 16.4 C is quite nice, I'll take that. Madona is situated in the Vidzeme Highland, they have one of coldest temperatures in winter as well, together with Zoseni and Aluksne. Low 23.3C, high 32.2C in Riga today. Dry, sunny all day. |
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Post by dunnowhattoputhere on Jun 21, 2021 14:10:18 GMT -5
I think I'd enjoy a summer in southern Finland or Sweden these days. Much sunnier and more consistent warmer weather than the UK, and apparently proper even severe thunderstorms as well. If our temperatures remained the same but sunshine levels were 50 hours higher every month, it would be a massive improvement. |
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Post by Met.Data on Jun 21, 2021 18:06:24 GMT -5
Annoying charts at the moment. Despite the jetstream being weak and going north, GFS keeps dropping a trough over the UK at the weekend, like a swollen haemorrhoid from the ass of the arctic succumbing to gravity's pull. And there won't even be any thunderstorms.
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Post by FrozenI69 on Jun 21, 2021 21:30:46 GMT -5
Looks sticky and uncomfortable. I hate hot nights, they really annoy me. Madona's 16.4 C is quite nice, I'll take that. Madona is situated in the Vidzeme Highland, they have one of coldest temperatures in winter as well, together with Zoseni and Aluksne. Low 23.3C, high 32.2C in Riga today. Dry, sunny all day. Wow, complete opposite for me. Today high was 23 C, low is 11 C. Partly cloudy with wind. Tomorrow is 19 C, and the morning is just 8 C, closing in on a record low for the first day of summer. Points to the NW are dipping even lower. I'm searching for a sweater to wear to start my first day of summer  . |
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