Any weather experts that can explain this?
If you look at the Perth metro graphs you can see a definite dip in wind speed when the sun comes up.
Anyone know why this seems to happen quite often?
to give the birds a chance to fart without it blowing back in there faces... 
sorry i dunno but now you have asked i wanna know too.
Select to expand quotebillykiter said..
Any weather experts that can explain this?
If you look at the Perth metro graphs you can see a definite dip in wind speed when the sun comes up.
Anyone know why this seems to happen quite often?
Not as often as northerly wrecks a good swell!
thermal drafts, temperature indifferences between land and sea cause this, eg seabreeze in afternoon caused by warm air off land rising and seabreeze rushing in to fill void, also have opposite in the morning.
If the interior of Australia is like the deserts of the western states, go out to the edge of the desert when the sun comes up, you'll get blown off your feet.
