FPKU40 NFFN 152100 RNZI NORTHERN AND SOUTHERN COOKS WEATHER BULLETIN ISSUED FROM NWFC NADI APR 152110 UTC. SITUATION: A TROUGH OF LOW PRESSURE WITH ASSOCIATED CLOUD AND SHOWERS AFFECTS THE GROUP. AN EASTERLY WIND FLOW PREVAILS OVER NORTHERN COOKS. MEANWHILE, A WEAK TROUGH OF LOW PRESSURE LIES WITHIN THE VICINITY OF THE GROUP. FORECAST TO MIDNIGHT TOMORROW FOR THE SOUTHERN COOKS: CLOUDY PERIODS WITH SOME SHOWERS. SHOWERS BECOMING OCCASIONAL WITH ISOLATED THUNDERSTORMS DEVELOPING FROM LATER TODAY. MODERATE TO FRESH NORTHEAST WINDS. WINDS BECOMING NORTHERLY FROM TOMORROW. MODERATE TO ROUGH SEAS. FURTHER OUTLOOK: CLOUDY PERIODS WITH SOME SHOWERS AND ISOLATED THUNDERSTORMS. FOR RAROTONGA: CLOUDY PERIODS WITH SOME SHOWERS. SHOWERS BECOMING OCCASIONAL WITH ISOLATED THUNDERSTORMS DEVELOPING FROM LATER TODAY. FURTHER OUTLOOK: CLOUDY PERIODS WITH SOME SHOWERS AND ISOLATED THUNDERSTORMS. FOR THE NORTHERN COOKS: CLOUDY PERIODS WITH SOME SHOWERS AND ISOLATED THUNDERSTORMS. MODERATE TO FRESH EASTERLY WINDS. MODERATE TO ROUGH SEAS. FURTHER OUTLOOK: CLOUDY PERIODS WITH SOME SHOWERS AND ISOLATED THUNDERSTORMS.