Operations and other mysteries
A blog by Andrew Cowie
Friday, 19 Oct 2007
And then it changed.
It was hot here the other day. And then it wasn’t.
At three in the afternoon on what was otherwise a lovely day in Sydney, it went from 34°C to 17°C in less than half an hour. Yikes.
Most places I’ve lived, this is a front coming through. But here, in the weather forecasts, they say “and then a change expected”. Change. Uh huh.
I suspect this is the result of Sydney being close to the south latitude region where the equatorial low pressure areas mix with the sub-tropical high pressure ones. Depending on which way the winds are slopping around, we’re either in a nice toasty warm tropical air mass or some nasty mess blowing in from the southern Indian Ocean. Same thing happens in Canada, only there it’s the marked difference between the temperate air masses and the arctic polar one.
AfC
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