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Why withdraw from the Paris Climate Accord?
President Trump’s decision to withdraw the U.S. from the Paris Climate Accord last Thursday is a disheartening blow to the longstanding idea that sound science should play a role in the formation of public policy in our country.
This notion, in fact, was central to the creation of the National Academy of Sciences by the first Republican president, Abraham Lincoln in 1863. Lincoln and the Congress charged the Academy with providing independent, objective advice to the nation on matters related to science and technology. Continue reading
Is the weather nicer on Memorial Day or Labor Day?
Memorial Day traditionally marks the beginning of the summer, while Labor Day marks the end.
People are bound to have their own recollections and opinions about which weekend more reliably delivers agreeable weather here in southern Wisconsin, and those opinions can be colored by many non-meteorological influences. Continue reading
Did someone predict the recent Wisconsin tornado?
We cannot yet forecast tornado occurrence with any accuracy. One problem is the small size of a tornado, which is a narrow column of strong winds that rotate around a center of low pressure.
Over the last 60 years, forecasts of the development of large-scale low-pressure systems, which often organize the ingredients needed to form a tornado, have steadily improved. Because of these advances, meteorologists are better able to predict those conditions a few days in advance, enabling forecasters to identify counties where there is a threat of severe weather sometimes as many as three days in advance. Two days in advance of the recent EF-2 tornado that hit southeastern Polk County, the National Weather Service’s Storm Prediction Center’s convective outlook issued a slight-risk for the area. Continue reading
Category: Meteorology, Severe Weather
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Is the weather in Madison more extreme than other locations in the U.S.?
Sitting nearly in the middle of the vast North American continent, Madison has what is known as a continental climate. Continental climates are characterized by large annual extremes in temperature and humidity as well as very distinct seasons.
The continental nature of Madison’s climate is what makes a year’s worth of weather in Madison usually a lot more varied than a year’s worth in, say, Seattle. Continue reading
Why is the grass wet in the morning, when it didn’t rain?
Recent spring mornings have produced wet lawns. To explain this, we start with the fact that air contains water in the gas phase, called water vapor. Dew is made of liquid water that has condensed from some of the water vapor in the air.
Dew occurs when objects cool. A common example of dew formation is when drops of liquid form on the glass of an ice-cold drink. Dew forms when the object, such as the glass, cools down to the dew point temperature. Continue reading
Category: Meteorology, Phenomena
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