1821 - The Hudson River was frozen solid during the midst of the coldest winter in forty-one years. Thousands of persons crossed the ice from New York City to New Jersey, and refreshment taverns were set up in the middle of the river to warm pedestrians. (David Ludlum)
1837 - At 7 PM a display of the Northern Lights danced above Burlington, VT. Its light was equal to the full moon. Snow and other objects reflecting the light were deeply tinged with a blood red hue. Blue, yellow and white streamers were also noted. (The Weather Channel)
So 1821 was the coldest winter since 1780 when NYC had its coldest month of all time in January and its coldest day at -16 !
and such a vivid description of northern lights from 1837, I wonder if it was visible down here?