Situation:

A southerly wind flow prevails over Southern Cooks. Meanwhile, a frontal system lies slow moving over the area.

A trough of low pressure with associated cloud and showers affects Northern Cooks.

Forecast to midnight tomorrow for the Southern Cooks:

Cloudy periods with brief showers. 

Moderate southerly winds.

Moderate seas.

Further outlook:   

Brief showers.

For Rarotonga:

Cloudy periods with brief showers.

Further outlook:   

Brief showers.

For the Northern Cooks:

Occasional showers and few thunderstorms.

Moderate to fresh east to northeast winds.

Moderate to rough seas.

Further outlook:   

Some showers and possible isolated thunderstorms

over most places.