Clusters of thunderstorms have developed from west of Kayak Island to Montague Island and south to Middleton Island. These storms are moving northwest around 25 kt. Mariners can expect erratic and gusty winds, locally higher waves, and frequent lightning strikes if around these storms. Additionally, small hail and waterspouts are possible in some of the stronger storms. Thunderstorm activity will taper off by early Friday morning as the low pressure system responsible for these storms moves east of the area.