During a blocking anticyclone, how might the weather differ between the western coast and the inland basins of New Zealand?

In the context of New Zealand's weather patterns influenced by a blocking anticyclone, the correct choice highlights a key characteristic of how these systems function. During a blocking anticyclone, the stable high-pressure system often leads to different weather conditions across various geographical regions.

The western coast of New Zealand typically experiences moist, westerly winds which can interact with the geographical features such as the Southern Alps. When a blocking anticyclone is present, these winds can be obstructed, leading to clearer skies and fine weather on the western coast, especially in the absence of frontal systems. This phenomenon allows for settled conditions, with drier air masses dominating.

Conversely, the inland basins, which are often more sheltered and can be influenced by the weather patterns associated with the blocking high, may experience moist air being trapped. This can result in more variable weather, often with increased cloud cover and the potential for precipitation, as the air is lifted over the terrain, creating conditions that can lead to rain.

This contrast between the coastal areas and the inland basins illustrates how local geography and the dynamics of a blocking anticyclone can lead to significantly different weather conditions, making it vital to understand these interactions for accurate weather forecasting.