The National Weather Service put the entire Garden State under a flood watch Sunday night as it assesses an impending storm with three threats: soaking rains, high winds and coastal flooding. The rain will start Tuesday and last until Wednesday morning, possibly tallying 4 inches in the northern part of the state, while the southern half will get 2 to 3 inches, the weather service said. Major river flooding could occur in the northern part of the state, along with coastal flooding, due to high winds Tuesday afternoon. The winds are forecast to gust up to 40 to 50 mph inland – and 60 mph along …