The outcome for wind patterns is not known. There are two main types of wind that could impact on our design of buildings: thunderstorm and tropical cyclone. Cyclones do not come as far south as the Central Coast. The event known as the “east coast low” is one where high winds occur in conjunction with heavy rain. These winds do not however reach the gust speeds found in strong thunderstorm events (thunderstorm “down-bursts”).

The movement of weather patterns southward is likely to bring more intensity to thunderstorm activity but the degree of this change is not yet known.

The movement of cyclone tracks southward may result in cyclone activity impacting more southward along the Queensland coast than currently occurs. The possibility of cyclones moving into NSW is not currently expected so it is not likely they will impact on the Central Coast.

The frequency of East Coast Lows such as those that occurred in June 2007 may increase. However, the wind gusts expected from these storms are not expected to increase enough to impact on the design of buildings.

Impact type                   2050                             2100                          2300

                                 Low        High                Low        High             Low        High

Wind Speed                       Not known……

[Assessed June 2010]