Since 1967, North American winter snow extent has been increasing, with many recent years being in the top twenty. The only reasonable explanation for this is that cold Arctic air is pushing further south into the United States during winter, causing snow to fall and remain on the ground further south than it did 50 years ago. During warm winters, the snow line moves further north. During cold winters, the snow line moves further south – i.e. greater extent. Canada is always covered with snow during winter.
Adjusted NCDC US winter temperatures show that the US is getting warmer during winter since 1967, which is at odds with the snow data
NCDC adjusts recent US winter temperatures upwards by 1.6ºF relative to the early 1970s. As always, they cool the past and warm the present to create the appearance of non-existent warming.
This leaves only two realistic possibilities.
- The freezing point of water has changed since 1967
- US winters are getting colder, and the NCDC adjustments are complete garbage.