Hi All
Do you remember winters and particularly the WIND CHILL being reported on the news when you were kids being much much colder than now?
The numbers reported 20 years ago were substantial colder, it is not global warming. They changed the system the original system for a wind speed of 20MPH at 5 F yielded a wind-chill of -31F the new system introduced in November 2001 yields a wind chill temperature of -15F. If you take this change into affect when they report record chill have the converted the old record under the old system to the new system.
I stumbled on the change when trying to convert Fahrenheit to Celsius, here is the link to the NOAA web page that explains the difference
http://www.crh.noaa.gov/ddc/?n=windchill
Cheers Phil
PS Current Wind Chill Temperature here is -35C old system -26C new system