Update: Upper-trough and frontal-low SW-Cape 25 August 20

More custom GFS charts are available this morning (00Z on Thurs 23rd), which show that the strong winds on Sat 25th will be produced by a combination of the offshore low and the ridging High Pressure moving in behind.

This custom GFS chart shows the likely gale force winds (> 35kts) and pressure gradients at 09Z on Sat 25th. It is unusual to see such strong winds over the interior of the Western Cape, and parts of the Eastern Cape.

Compiled by Gordon Richardson - Stormchasing SA