February NAO and Monthly Snowfall in NYC/DCA

[donsutherland1]

The data is taken from February 1950 through February 2004:

New York City:

Code: Select all

NAO   10" or More   Pct.   < 2"   Pct.   Avg.
+    4/21           19%   13/21   62%    4.5"
-   12/34           35%    6/34   18%    9.6"


Notes:
• In the 7 years when the NAO averaged +1 or above in February, none saw 10" or more in NYC
• The average monthly snowfall when the NAO averaged between -0.999 and -0.001 came to 11.5"

Washington, DC:

Code: Select all

NAO   6" or More   Pct.   < 1"   Pct.   Avg.
+    3/21           14%   11/21   52%   3.4"
-   11/34           32%   10/34   29%   6.5"


Notes:
• In the 7 years when the NAO averaged +1 or above in February, none saw 6" or more in Washington, DC
• In the 10 years when the NAO averaged -2 or below, none saw less than 1" snowfall in Washington, DC
• The average monthly snowfall when the NAO averaged between -0.999 and -0.001 came to 7.0"