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Originally Posted by tom77falcons
Why do you use Warsaw to compare to Chicago? Why not compare Warsaw to somewhere north of Winnipeg?
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You first claimed that you had many more severe winter months than "Europe". So I used Warsaw as it's pretty centrally located in the continent. Also I often use it for comparisons and am familiar with the location of the weather station, which is comparable to ORY and PHL (not that it's really important when comparing deviations to averages). You then talked about the Midwest, that's why I put Chicago in the graph. Why would I compare Warsaw to somewhere north of Winnipeg? Latitude? Its winters are significantly milder than Chicago's thanks to Atlantic moderation, let alone Winnipeg's.
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Another thing your data doesn't show is how back to back our winters can be brutal.
1960 -61 winter mean -6.4F
1961-62 " " -5F
1962 63 " " -7F
1963-64 " " -4.4F
1976-77 " " -7.3F
1977-78 " " -6.9F
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Which means that you have long periods lacking severe winters.
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I didn't see one period in Sofia where something like this happened. Worst winters there were 1984-85 with -5.5 below the mean and 1962-63 with -7F off the mean. Winter 85-86 there was -1.5F below the mean, and winter 86-87 was 1.6F below the mean.
1962-63 there was bad, though still not as bad as here (1977). Nothing since 1962 to 63 there is anywere near as bad as we got in the late 70's. Europe is overdue for a long cold winter. The winter of 2012 was nothing compared to what we got in the late 70's. The mean temp in winter of 2012 was 3.5F below the mean in Sofia. We got that twice in the 1980's in winter 80-81 and 81-82, and we were 4F below the mean in 2002-03.
I surely hope Western Europe gets what seems overdue. Our worst most recent winter was 1977-78 (-6.9F)and in Sofia it was 1962-63(-7F). Seems we have 15 years on Europe. 
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The 2011-2012 winter was nothing as a whole, December and January were either average or much above normal across most of Europe. When I mentioned it I had in mind the early February coldwave, which was indeed quite potent in many parts of the continent, including Romania and Bulgaria. Same as December 2010 in the UK. The rest of the 2010-2011 winter was milder than normal there.
Strangely you choose to generalize Sofia to the whole Europe. FWIW, Warsaw, another European location, was 6.8°F below normal in 1978-1979, 8.3°F below normal in 1984-1985 and 7.0°F below normal in 1995-1996.
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We've had more than our share. The core of the cold usually goes somewhere and then elsewhere it is above normal.
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Yup, but the above normal zone can well be the central Atlantic with an omega block over Greenland. The correlation for winter temps between Chicago/New York and Warsaw/Paris is positive. When the Midwest/eastern US is cold, western/central Europe is more likely to be cold than mild, and vice-versa. See how 1962-1963 was cold everywhere, all the way from Chicago to Sofia.
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