A cold front is expected to shift southward and fall across the south, resulting in showers and thunderstorms for the next two days. There is a 30-40% chance of rain in Florida, with a 50% chance in Melbourne and a 60% chance for rain in Daytona. Some storms may be stronger, capable of producing frequent lightning, gusty winds, locally heavy rainfall and small hail. An increase in wind speed will cause hazardous beach and boating conditions.