October 9,  1804 – As the Snow hurricane crossed New England, cool air became entrained in the circulation, and it became extratropical. The storm brought heavy snow across the Northeast, in some areas up to , and killed a total of 16 people; one on land and fifteen at sea.
October 9, 1804 – As the blizzard swept through New England, cold air merged with the storm's circulation, transforming it into an extratropical cyclone. The tempest dumped heavy snow across the Northeast, reaching depths of , and resulted in a total of 16 fatalities; one on land and fifteen at sea.