Whats Causing Snow to Decline Locally?
* Rain & Warmth Tomorrow: Full Forecast | Snow Lover’s Crystal Ball * The long-term trend in snowfall locally is decidedly downward, as I demonstrated in our Winter Outlook. I speculated the cause might be some combination of: *the urban heat island effect — where heat from buildings/asphalt could result in less snow sticking *climate warming — which might cause a greater fraction of precipitation to fall as rain compared to snow (I’ll try to analyze this in a subsequent post) *long-term changes in certain weather patterns — which I’ll focus on in this post; specifically, the North Atlantic Oscillation (NAO) pattern. Two weeks ago, I more or less ruled out observation bias (changing measurement techniques and station locations) as a significant contributor to the trend — at least in recent decades. So let’s turn to the NAO. Keep reading to learn about the NAO pattern and how it may be influencing seasonal snowfall… The North Atlantic Oscillation (NAO) is considered to be a major
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