More fog on its way for Auckland
Mon, 09 Jul 2012 1:18p.m.
With flash floods last Tuesday, thick fog on Thursday and Friday and frost in the morning for the last few days, Auckland has had a spell of unusual weather lately.
The cold snap arrived earlier than usual for the city; last year the month of June was mild, followed by an initial cold snap in July but it wasn’t until August that the city had a full-blown cold snap.
According to WeatherWatch’s head weather analyst Philip Duncan, the frosts are caused more by the wind direction than especially cold air.
"We've had some cold southerly blasts this winter but really the frosty weather has been caused by an increase in south easters and southerlies - a wind direction that usually brings clear skies, mild days and very cold nights to Auckland - but the breeze is noticeably cold," says Mr Duncan.
"The difference between a south westerly wind in Auckland and a south easterly is substantial for Auckland - when it turns more south east it means clear skies and colder nights with the air coming off the land and not from over the warmer waters of the Tasman Sea".
As the centre of a high travelling across the country passes over Auckland mid-way through this week Mr Duncan says the frost will turn to fog.
"This morning we had reports of heavy fog around some parts of Waikato and Auckland as this south east wind flow finally dies out. This means we're likely to see more fog patches over the next few days with frosts fading out for many northern areas by the end of the week."
The fog is not expected to be as heavy as it was last week.
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