Understanding Weather – not predicting -14 June 2013

What happened?
A cold front, driven by a ridge (high pressure cell) was followed by a second, weaker cold front which penetrated far across the southern part of the continent. This brought the first real winter conditions to Namibia and is lasted the entire week.
The prominence of secondary vortex recurrence, quite frequent these days, may seem unusual within cold air in circulation behind a departing vortex core, but the cold inflow is often unstable with a lapse rate steeper than the standard 3o per thousand feet. Such instability quickly forms conflicting airflows battling each other leading to stormy winds from surface level to several thousands of feet aloft.