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Post by Beercules on Oct 5, 2018 22:38:13 GMT -5
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Post by Tired on Oct 5, 2018 22:42:55 GMT -5
Yeah its feb 1985, thanks for the correction. Hottest month ever at most perth stations.
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Post by theeastfrisian on Oct 17, 2018 13:53:16 GMT -5
I think the recent heat records here at the North Sea were also quite remarkable, in some places even the actual maximum record for the whole month of October was broken. Norderney Island for example never had a October high above 22.9°C (73°F) since records began in 1947. Last saturday this record was virtually smashed with a new record high of 25.5°C (78°F), so the old record was broken by 2.6 K or 5 F.
Since the sea water temperature had already cooled down to about 13-14°C (56-58°F), i was quite surprised to see those old records (the old one was from October 12th 1979) being broken by several degrees. Lets see how long these records will stay.
Also my city (Bremerhaven) had a new October record with 26.0°C (79°F), but the old one (from 2011) was only broken by 1/10 degrees (C). Before 2010 most heat records for October were well below 25°C in most places in Northern Germany, so maybe we see a new warming trend here?
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Post by irlinit on Oct 17, 2018 14:19:29 GMT -5
Our average December low of 10C in 2015 is pretty impressive IMO
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Post by Nidaros on Oct 17, 2018 15:50:27 GMT -5
Just dig into some old data, all official, and discovered a station inside the Arctic Circle with an October month with 24-hr mean above 10°C. The mean was 10.4°C. That might not sound very impressive to you living in warm and temperate climates...but this is indeed remarkable, might very well be the one and only such Oct month in the world recorded at those latitudes.
The same station had a Mar with mean 4.7°C, April with mean 7.3°C - and a June with mean 15.3°C.
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Post by Nidaros on Oct 18, 2018 12:13:51 GMT -5
Also found an offical station inside Arctic Circle with a November with 24-hr mean 8°C
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Post by Babu on Oct 18, 2018 12:45:06 GMT -5
^That's beyond insane. I don't know about the 24h means, but the SMHI method means have only been above 8'C in the southernmost parts of Sweden in November, the northernmost being Landsort close to Nyköping.
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Post by Ariete on Oct 18, 2018 13:18:06 GMT -5
Highest November mean in Finland is 7.6C on Utö in 2000.
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Post by Ariete on Oct 18, 2018 13:25:07 GMT -5
Oh, this is quite remarkable; Inari Seitalaassa, Lake Inari (69.1N), 5 months with a mean above 10C in 2013.
@kronan made a weather box for it once:
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Post by Deleted on Oct 18, 2018 14:18:10 GMT -5
gunnarn/stensele in northern sweden reached 20.9C this month, obliterating the previous october record there with a whopping 4.6C. and this is a station that started in 1860.
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Post by Nidaros on Oct 18, 2018 16:07:35 GMT -5
Just dig into some old data, all official, and discovered a station inside the Arctic Circle with an October month with 24-hr mean above 10°C. The mean was 10.4°C. That might not sound very impressive to you living in warm and temperate climates...but this is indeed remarkable, might very well be the one and only such Oct month in the world recorded at those latitudes. The same station had a Mar with mean 4.7°C, April with mean 7.3°C - and a June with mean 15.3°C. Here it is - warmest monthly 24-hr means at Glomfjord. Some years still missing in the digital database.
This place is a small town/village in a relatively narrow and short fjord, opening to the sea to the west. To the east is the Saltfjell mt range with Svartisen glacier. This station has recording back to 1916, and is used for recording climate development in the region, so I should guess the data and placement are both of good quality. Coldest months roughly matches Reykjavik 3 degr of latitude further south, the warm period of the year is much warmer at Glomfjord.
Jan 1934 - Feb 1959 - Mar 1969 - Apr 1937 - May 2013 - Jun 1953 - Jul 2014 - Aug 1969 - Sep 1934 - Oct 1961 - Nov 2011 - Dec 1929
Doesn't get very cold either, coldest monthly mean from Feb 1966: -4.6°C, and that was an extremely cold month, as the second coldest month was Feb 1958 with mean -2.9°C
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Post by Babu on Oct 19, 2018 0:54:07 GMT -5
They've never since the beginning of the 20th century had a month colder than -4.6'C???  Even Falsterbo has had -6.6'C. What's the average minimum temperature at that place? |
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Post by Nidaros on Oct 21, 2018 16:10:50 GMT -5
They've never since the beginning of the 20th century had a month colder than -4.6'C??? Even Falsterbo has had -6.6'C. What's the average minimum temperature at that place? Yeah, strange. Finally had time to check. Data not in open sources, had to log in to database.
The 61-90 mean for January, coldest month, was -1.3°C. So winter variability isn't very big there. Glomfjord also gets 188 days/year with 1 mm precip or more.
I checked the last 22 years, 1997-2018. Three of those 22 years had Jan months slightly colder than the 61-90 mean, one year was right at the mean, and the other 18 years had warmer Jan months. 11 of the last 22 years Jan had mean > 0°C.
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Post by Nidaros on Oct 21, 2018 16:16:42 GMT -5
Also found an offical station inside Arctic Circle with a November with 24-hr mean 8°C That was Myken (66°46 N, island) in Nov 2011, mean 8°C. It also had mean 7C in Nov 2000, and several Novembers with mean 6°C or more. The 61-90 normal there for Nov is 3.4°C, so mean for 81-2010 should be ca 4.4°C.
Btw, the Jan mean there is 0.5°C in 61-90, so should be ca 1.5°C in 81-2010. Annual mean 5.5°C in 61-90.
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Post by urania93 on Oct 25, 2018 4:12:01 GMT -5
It looks like yesterday's foehn wind broke some temperature records [1]: 31.2°C in Domodossola (it is at the bottom of a very narrow valley among very high mountains, so that place is very prone to foehn) New record for the 3rd decade of October (very close to the monthly record too, which is 31.4°C) 27.2°C in Moncalieri (this is in the plain practically, so it is indirectely affected by foehn) New record for the 3rd decade in October 31.5°C in Parma (indirect warming) New record for the whole month of October 27.4°C in Modena (indirect warming) New record for the 3rd decade of October Probably my valley broke some records too, some places went very close to 30°C, but the data have not been elaborated and surely now I don't have the time for doing it by myself. |
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Post by Lommaren on Oct 25, 2018 4:22:05 GMT -5
Parma's new record is definitely remarkable since it's on a plain and 24 October has quite a low sun angle there for an inland location. Having experienced föhn all your life would you agree with my assessment that Nuuk's stunning winter record high temperatures compared to its averages in a coastal location by a really frozen sea must be föhn-induced urania93 ? Lots of mountains for the air to go up and down over around there. Even with föhn help, to go 18-19°C above the average high for a maritime tundra several winter months (not just a one-off) is quite remarkable. |
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Post by urania93 on Oct 25, 2018 5:43:50 GMT -5
Parma's new record is definitely remarkable since it's on a plain and 24 October has quite a low sun angle there for an inland location. Having experienced föhn all your life would you agree with my assessment that Nuuk's stunning winter record high temperatures compared to its averages in a coastal location by a really frozen sea must be föhn-induced urania93 ? Lots of mountains for the air to go up and down over around there. Even with föhn help, to go 18-19°C above the average high for a maritime tundra several winter months (not just a one-off) is quite remarkable. I'm not sure that foehn effect could be involved, for having foehn during the winter in that area you would need an humid air mass approaching from somewhere in the frozen Greenland and passing over some mountain range. In order to justify a temperature like that, the starting air should be warm already, very humid and should also pass over some very tall mountain. An humid air mass approaching from the sea would just cause precipitations instead (but some place more inland could have some foehn effect). All that geography is not exactely what it comes to my mind when thinking about foehn, but maybe it would be better to compare it with foehn-prone areas in places like Norway for example. Also, to check the humidity levels and the temperatures all over the region during those record events could be useful for understanding what was going on. |
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Post by Lommaren on Oct 25, 2018 5:59:00 GMT -5
I'm not sure that foehn effect could be involved, for having foehn during the winter in that area you would need an humid air mass approaching from somewhere in the frozen Greenland and passing over some mountain range. In order to justify a temperature like that, the starting air should be warm already, very humid and should also pass over some very tall mountain. An humid air mass approaching from the sea would just cause precipitations instead (but some place more inland could have some foehn effect). All that geography is not exactely what it comes to my mind when thinking about foehn, but maybe it would be better to compare it with foehn-prone areas in places like Norway for example. Also, to check the humidity levels and the temperatures all over the region during those record events could be useful for understanding what was going on. I was thinking along the lines of maybe something like this?
Humid, mild maritime air originating from the Gulf Stream hitting the landmass to its south, then at some stage gaining enough momentum over these inland areas to become föhn over the final range near Nuuk, therefore maximizing warmth potential. That way the mild and humid air (say 7-8°C) travelled over some land as well? Since Greenland ice a frozen ice pack just a few dozens of kilometres inland it can't have come from there, since those glaciers never are above freezing except in summer months. So maybe this could be it? The path in question would be about 80 km over land, but originating from the vast sea right south of where the red line begins. I also noticed Nuuk has warmer record highs of December and January than Volgograd at 48°N with a direct unhindered south-westerly path from the Black Sea, so some kind of mountain effect should be in play here.
As for the red line being unstable, I blame Paint 
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Post by urania93 on Oct 25, 2018 10:13:21 GMT -5
[I was thinking along the lines of maybe something like this? Humid, mild maritime air originating from the Gulf Stream hitting the landmass to its south, then at some stage gaining enough momentum over these inland areas to become föhn over the final range near Nuuk, therefore maximizing warmth potential. That way the mild and humid air (say 7-8°C) travelled over some land as well? Since Greenland ice a frozen ice pack just a few dozens of kilometres inland it can't have come from there, since those glaciers never are above freezing except in summer months. So maybe this could be it? The path in question would be about 80 km over land, but originating from the vast sea right south of where the red line begins. I also noticed Nuuk has warmer record highs of December and January than Volgograd at 48°N with a direct unhindered south-westerly path from the Black Sea, so some kind of mountain effect should be in play here. As for the red line being unstable, I blame Paint  For me it is not so easy to reason about that place, nor about the movement of large air masses (I'm used to work with stuff which can be contained within a test tube), but somehow a localised air mass with a trajectory parallel to the coast line passing over a series of reliefs doesn't feel completely plausible to me. But it is just a impression, I could not explain it. We need someone who knows some atmosphere physics or something like that in here! Can anyone help us? |
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Post by Lommaren on Nov 21, 2018 6:04:12 GMT -5
Found something rather interesting from 1953!
Norrköping had two nights just above 16°C lows on May 1 and May 2 (16.0 and 16.1), and then proceeded to have a record warm 14°C avg low for June, and the 31-day values for June 8-July 8 the average low was 15.3°C. This in turn was 0.1°C warmer than the average low for July 2018!
What is more remarkable in all of that was that both June and July 1953 ended up right at 22°C highs, so in other words, really unprecendented low diurnals for the early summer.
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