What signs should boaters look for in anticipation of a thunderstorm?

On a sunny day, look for Cumulus clouds. These are the puffy clouds that look like balls of cotton in the atmosphere. These clouds will start to build vertically if the atmosphere is unstable.

Common sense would dictate listening to a weather report. If the dew point temperature is above 60 degrees this could mean that the potential for heavy drenching thunderstorms is higher.

If a forecast calls for thunderstorms; be observant of the wind direction out on the water. Wind direction will change if thunderstorms are in the area.

When you see black clouds rolling in get off the water if possible! At this point it could be too late and you may have to weather the storm. Remember rain can limit your horizontal visibility.