The final data is in for the unprecedented March heat wave that was “unmatched in recorded history” for the U.S. and Canada. New heat records swamped cold records by the stunning ratio of 35.3 to 1.
This ratio is almost off the charts, even with the brutally warm August we had, as this chart from Capital Climate shows.
For the year to date, new heat records are beating cold records by 22 to 1, which trumps the pace of the last decade by more than a factor of 10!
I like the statistical aggregation across the country, since it gets us beyond the oft-repeated point that you can’t pin any one record temperature on global warming. A 2009 analysis shows that the average ratio for the 2000s was 2.04-to-1, a sharp increase from previous decades. Lead author Dr. Gerald Meehl explained, “If temperatures were not warming, the number of record daily highs and lows being set each year would be approximately even.”
Meteorologist Jason Samenow points out just how extreme the heat wave was: “More than 7,700 daily record high temperatures were set or tied, compared to just 287 record lows, in some cases by mind blowing margins and over multiple days. In several instances in the Great Lakes and Upper Midwest region, morning lows even bested record highs and high temperatures soared above mid-summer norms.”
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