From Don S.
It is typically a signal of a warmer winter.
Since 1980, the following has occurred in New York City when both October and November were warmer than normal:
Succeeding winter:
Colder than normal: 3/13 (23%) cases
Near normal: 1/13 (8%) cases
Warmer than normal: 9/13 (69%) cases
Breakdown of months:
December:
Colder than normal: 4/13 (31%) months
Warmer than normal: 9/13 (69%) months
January:
Colder than normal: 2/13 (15%) months
Warmer than normal: 11/13 (85%) months
February:
Colder than normal: 2/13 (15%) months
Warmer than normal: 11/13 (85%) months
December-February:
Colder than normal months: 8/39 (21%) months
Warmer than normal months: 31/39 (79%) months
The snowfall signal was mixed.
Mean: 24.2"
Median: 24.9"
Lowest: 3.5", 2001-02
Highest: 61.9", 2010-11
Who cares about NYC? lol