Weak surface to low-level instability across the islands will continue to generate occasional light to moderate showers during today. However, by nightfall, model guidance suggests a deterioration in weather conditions due to a more favorable mid to upper atmosphere. As a result, shower activity is expected to increase in frequency and intensity into Tuesday. Cloudy skies with pockets of heavy showers and isolated thunderstorms are likely. Residents and motorist in areas prone to flash-flooding or near rivers and streams should remain alert.