To put this year’s winter cold into perspective, there is an informative article by Jon Erdman at weather.com America’s Coldest Outbreaks January 17 2018 Excerpts with my bolds and references to CO2 concentrations at the referenced dates. Note that temperatures are in degrees Fahrenheit.
The Clear Number 1 February 1899: Atmospheric CO2 295 ppm.
The cold wave during the first two weeks of February 1899 is by far and away the gold standard for cold outbreaks in U.S. history.
What made this outbreak worthy of its lofty status was the magnitude, areal coverage and longevity of the cold.
For the first and only time on record, every state in the Union (recall, there were only 45 states at the time) dipped below zero. Subzero cold invaded parts of south-central Texas, the Gulf Coast beaches and northwest Florida.
Tallahassee, Florida, dipped to -2 degrees on Feb. 13, 1899, the only subzero…
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