This section deals with wind roses which are compilations of wind information collected from various ARC-ISCW weather stations (WS) situated on various farms within the province. The information gathered come from the following WS, they being at Voorstekop (near Heidelberg), Zandvliet (near Ashton), Langgewens (near Malmesbury), Oudtshoorn and Outeniqua (near George).
The approach is to compare this month’s wind rose with last year’s and the long term mean, accordingly three wind roses are presented for each WS.
During December 2010 winds with a southerly to south easterly component dominated as can be expected in the middle of summer. There was a stronger southerly to easterly component during December 2010 than during December 2009 and the long-term average for December. This is an indication of more frequent and stronger ridging of the Atlantic Ocean Anticyclone to the south of the country that favoured above-average rainfall over most of the interior as well as along the eastern coastal areas of the Western Cape.Voorstekop
Zandvliet
Langgewens
Oudtshoorn