Lytton, BC: Northernmost Csb? ( I'll not start flame-war with "Mediterranean"... ) (hot, average)
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Stuie is certainly very far north for a Csb climate in North America, and is one of those isolated pockets that crop up from time to time. It isn't very Mediterranean, but it's borderline so that's no surprise. It still seems to bear similarities to Pacific Northwest characteristics, though.
On one world climate map I saw a small pocket of Csb in the Alaska Panhandle, but in my extensive search I've found no records of such a place. I've found several Dsc climates, but no Csb. It may not even exist but with the summer drying trend of some parts of the Panhandle and the milder winters there's a small chance of a Csb (maybe even a Csc) being somewhere in there.
Intriguing - where were the Dsc spots?
It seems to be there needs to be enough of a rain shadow or far enough inland that the summer minimum is low enough to qualify for an s-marker, but not so far inland that the precipitation regime switches to the late-spring; summer max typical of the interior.
Fifty degrees north, and meets all of Koppen's criteria for a Csb climate:
Coldest month averaging warmer than -3C.
Driest month less than 30mm of precipitation.
Driest month less than less than one-third wettest winter months precipitation.
It's just shy of Dsb by about 0.6C in the coldest month, and just shy of Csa in the hottest two months, again by 0.6C. Though little rain falls, it's too cool and wet to qualify as semi-arid given the winter max.
Unlike many stations elsewhere in the interior, it shows a strong winter max stations even as nearby as Spences Bridge and Lytton don't recieve. My best guess is that come coastal weather is funneled up the Fraser canyon. ( I'd love reliable climate data for Boston Bar or any one of the little towns north of Hope, south of Lytton, as it seems like it would have a very intriguing transitional climate. )
Boston Bar is only 40 km away from Lytton, but has almost twice the precipitation (855 mm/year). Yale, is another 40 km past that, and has almost double again the precipitation (more than 1500 mm/year). Hope is another 20 km past Yale, and gets an additional 500 mm/year. The climate starts drying out after that as you move towards Vancouver.
How can you say that, JetsNHL? Koppen clearly defines the criteria for Csb as:
Coldest month averaging warmer than -3C.
Driest month less than 30mm of precipitation.
Driest month less than one-third wettest winter month's precipitation.
Now, the OP is using archaic 12 year old data, and still getting a place warm enough to meet the criteria. Lytton now only averages -0.8 degrees for January, not the -2.4 used by the OP. December is the coldest month though, and that is now colder than it was 10 years ago (down to -1.8C). This is also clearly warmer than -3C, is it not?
Lytton is at 50.233N, but there are others that fit further north than that.
Pemberton (50.303N) for one. Though there isn't enough recent data to generate a recent normal, but we know from historical data the place is very dry in summer, and very wet in winter. Temperaturewise, it averages about -2.3C in December (the coldest month).
It's just shy of Dsb by about 0.6C in the coldest month, and just shy of Csa in the hottest two months, again by 0.6C.
Given the fact that the 2000-2009 was the hottest decade on record for summer months by a long shot, Lytton now averages 22.0C, so I guess that makes it Csa? Perhaps furthest north Csa?
According to Koppen you guys may be right, but in reality none of these climates are cfb or csa
That makes no sense. Cfb and Csa are defined by the Koppen system.
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