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Monthly Archives: February 2023
How much energy goes into making snow?
Since Dec. 1, Madison and Dane County have received approximately 40 inches of snow — 3 inches above normal for that span.
Snow is a form of solid water, and water is the only substance that occurs naturally in all three phases — solid, liquid and invisible gas — in the Earth’s atmosphere. Continue reading
When does the winter cold end?
It has now been more than two weeks since our last below-zero morning here in Madison — Feb. 3 was minus 8 degrees. Thus, a natural question might be this: Are we done with bitter cold for the winter?
If we use an overnight low temperature at or below zero as the metric, then 45 of the 83 winters since 1939-40 have seen a cold spell after Feb. 20 — a surprising 54.2% of the time. In fact, in 1982, the last zero degree (or colder) night was not until April 7, the latest date in the last 83 years. Continue reading
What is a stratospheric sudden warming?
The region of the atmosphere closest to Earth, where the temperature decreases as you go up, is called the troposphere. The top ranges from about 6 miles over the cold poles to 10 miles over the tropics. Above the tropopause … Continue reading
How did January measure up?
What a strange month January 2023 was in Madison.
The cloudiness was remarkably persistent and, though we don’t have a measurement of that variable for the month at hand, anecdotal assertions we have heard suggest that Madison got only about 8% of its possible January sunshine this past month. Continue reading
