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Monthly Archives: September 2014
What is the meteorological origin of these beautiful fall days?
The beautiful, crystal clear early fall days that we have recently enjoyed are characteristic of September in southern Wisconsin.
Such days are often quite cool to start, with morning temperatures in the 40s, but often warm by late afternoon when temperatures can soar to the mid- to high 70s. Continue reading
Category: Meteorology, Seasons
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Do September temperatures foretell the nature of the winter?
After the recent abnormally cold period, which has left us 3.2 degrees colder than normal thus far in September, a lot of people have been wondering if September temperatures can be a harbinger of what is to come in the winter.
Everyone recalls last winter as a persistently cold season during which we experienced a four-month period (December 1 – March 31) with an average temperature that was 7.44 degrees below normal. Interestingly, last September was 2.7 degrees above normal and last October was 1.0 degrees above normal. Continue reading
Category: Climate, Meteorology, Seasons
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What is an equinox?
The equinoxes (from “equi,” meaning “equal,” and “nox,” or “night”) occur when the sun’s rays strike the equator at noon at an angle of 90 degrees.
In the Northern Hemisphere, the vernal or spring equinox occurs around March 20, and the autumnal or fall equinox occurs on September 22 or 23. Continue reading
How does the Farmer’s Almanac make its forecasts?
The Farmer’s Almanac makes seasonal forecasts and recently came out with its winter forecast.
The Farmer’s Almanac does not share how it makes its forecasts so it cannot be judged scientifically. There is no proven skill of its forecast accuracy. Continue reading
How does the wind make waves on water?
Waves form as the wind’s energy is transferred to the surface of water.
A weak gusty wind can make ripples appear on smooth water. These ripples will dissipate quickly once the wind stops. Continue reading
