Northern and Southern Cooks Weather Bulletin issued from NWFC Nadi Aug 211528 UTC. Situation: A weak frontal system remains slow moving to the south of Southern Cooks. Meanwhile, a southeasterly windflow continues to prevail over the group. A weak trough remains slow moving over Northern Cooks. Meanwhile, a moist easterly windflow continues to prevail over the group. Forecast to midnight tonight for the Southern Cooks: Cloudy with occasional showers and chances of a few thunderstorms. Moderate southeasterly winds. Moderate seas. Further outlook: Brief showers. For Rarotonga: Cloudy with occasional showers and chances of a few thunderstorms. Further outlook: Brief showers. For the Northern Cooks: Fine apart from few cloudy periods. Moderate east to southeasterly winds, fresh at times. Moderate to rough seas. Further outlook: Few showers.