Spring 2017 Discussion Thread (Southern Hemisphere)

LMAO www.weatherzone.com.au/news/heatwave-health-alert-issued-for-southern-tasmania-as-130yo-record-set-to-fall/527139

That is the usual standard of posting on the Vic and Tas sections of that forum. 

I reckon they ought to be sent by cargo ships to Eureka so they can find their dream climate?

Nyköping does too I'm pretty certain that July averaged something like 22.6/13.0 here in July 1981-2010!

Just imagine that: we're more accustomed to peak summer warmth than they are!

Having said that, I'd trade our climate for theirs every day of the week though, polar tundra that Nyköping is.

Even certain parts of NSW have cooler summers than Nyköping; the midsummer average here is only 7°-22° C. I have no idea how your town manages such a warm climate at such a high latitude...in this part of the world, 59° S is downright Antarctic!

As soon as you're south of 44° S, there is no chance of heat. The Roaring Forties fuck up any chance of proper heat beyond this parallel.

The Gulf Stream that is around Orkney and Shetland brings background air to higher temps in winter.

Then you have the Norwegian mountains blocking north-westerlies and parking those on the Norwegian coast most of the time.

The dominant SW wind pattern instead does travel over a bunch of land and shallow water that doesn't make that big of a difference in summer.

Nyköping is also behind an inlet, rendering all air travel over some land before reaching Nyköping in summer.

Then the short nights help with the diurnals, which renders overnight lows warmer than Southampton because of the 18°C sea water to the east and the fact that the sun angle doesn't go beneath -10° in summer at all and rises almost as early as in Shetland.

It's a perfect storm is what it is It's messed up that it's so much warmer than Thurso at the same latitude in summer in a way, but even more remarkable if you look at North Koster, an island off our west coast (!) about 450 miles I believe from the Northern Isles.



This is at high 58°N just like where I live but instead directly facing the Atlantic Ocean! Such is the difference those mountains in Norway make, that an offshore island there manages warmer lows in summer than Lerwick manages highs

Needless to say that's completely impossible in the SH. Having said that, Comodoro Rivadavia and Alexandra have 25°C summers at 45°S, with the former even being a coastal town But way offshore, then of course, you're right.

Comodoro Rivadavia and its remarkable coastal colleagues such as Rawson on 43°S (29.3°C) is because of the arid rain shadow land to the west being sheltered by the Andes. The fact that the landmass is narrow enough but with such a high mountain range really to its west creates a unique microclimate along that coast and a bit inland until elevation starts to rise. Nearer the Andes, places like Esquel and Bariloche have rather sensationally cool summer temps.

I think the sea surface temps there get heavily affected by the desert winds, bringing warm and dusty conditions to the shoreline. It's kind of similar to Eastern Spain, except an even more extreme process given that Spain only has a highland, not a real range blocking the Portuguese air, and the Gulf Stream starts even warmer, so most of the time it just travels through.

The flat plain north of Hobart gets some pretty warm summers too. 25C highs in Ouse for instance, and it's at 42-ishS. It's in the rain shadow to the mountains to the west. They get cold nights though.

Convectional thunderstorms on the last two afternoons, although they've been about 20km inland, not on the coast. I was fortunate enough to be working inland today, and it was only about an hour from the first cloud build up, to the first thunder.