Flash Flooding in Nova Scotia

There have been reports of flash flooding in several parts of Nova Scotia due to heavy rainfall and thunderstorms. Among the areas affected are New Minas, Avonport, Coldbrook, Port Williams, and Wallbrook.

The cluster of thunderstorms began in the Digby Neck area of Nova Scotia around 6 a.m. and moved towards the Annapolis Valley and Minas Basin by 10 a.m. These thunderstorms brought significant rainfall rates, with the weather station at Kentville recording 40 mm in just one hour. This rainfall rate is considered a one-in-10 year event for the Maritimes, and it is the third such instance this summer alone. Rainfall totals from these thunderstorms ranged from 50 to 80 mm.

The risk of thunderstorms and downpours is expected to continue throughout Wednesday afternoon for the Maritimes. The areas at a higher risk include coastal areas of southwest New Brunswick, the Atlantic coastline of Nova Scotia, and eastern parts of the province.

Rainfall warnings are in effect for Nova Scotia, parts of southern New Brunswick, and Kings/Queens Counties of P.E.I. These warnings forecast general rainfall totals of 50 to 80 mm, with the potential for even higher amounts during thunderstorms. Special weather statements are also in place for central New Brunswick and Prince County, P.E.I., calling for totals of 30 to 45 mm of rain.

Environment Canada is occasionally issuing severe thunderstorm warnings when specific areas experience the heaviest downpours. As the evening progresses, the risk of downpours and thunderstorms is expected to diminish in western areas of the Maritimes. For eastern areas, the risk will diminish overnight into early Thursday morning.

The heavy rain and downpours are a result of a series of weather fronts moving into the Maritimes. While not directly related to Hurricane Franklin, which is located far to the south, the hurricane has contributed to the increased moisture in the atmosphere, fueling the heavier rainfall.