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Category Archives: Meteorology
When is the autumnal equinox?
On Wednesday morning, we will officially enter fall as the autumnal equinox occurs at 3:20 a.m.
On Wednesday, in common with every location on Earth, we will enjoy exactly 12 hours of daylight and 12 hours of night.
Of course, 12 hours of daylight in Madison (latitude 43N) is substantially different from 12 hours of daylight at the North Pole (latitude 90N) where the sun will barely be visible above the horizon for the 12 hours of “daylight.” On the very next day, the sun will not appear above the horizon at the Pole and will not come back for six months. As the days march on, the same fate will gradually overtake other latitudes in the Northern Hemisphere until by Dec. 21, the sun will not rise even at 66.5N. Continue reading
Is the smoke from western forest fires affecting our weather?
This year there have been many fires on the west coast of the U.S. and Canada.
Most of these fires are in remote regions and were started by lightning strikes. This smoke has drifted over our region. It will not have much of an effect on our temperature or precipitation. However, official weather reports include observations on sky conditions and visibility. Continue reading
Category: Meteorology, Phenomena
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What caused the recent weather extremes?
The National Weather Service in Milwaukee confirms that three separate tornadoes occurred in our state on Tuesday.
EF-1 tornadoes, with winds estimated at up to 110 mph, struck Lake Geneva and a location just outside of Big Bend. An EF-0 tornado, with winds estimated at up to 80 mph, struck southwest Waukesha. Continue reading
Category: Meteorology, Seasons, Severe Weather
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What is the hydrologic cycle?
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 Seattle, for instance. Continue reading
Can we predict tornadoes?
A tornado is a powerful, narrow column of winds that rotate around a center of low pressure. The winds inside a tornado spiral inward and upward, often exceeding speeds of 300 mph.
We cannot always tell if a developing storm will produce a tornado. Advances in radar technologies have helped to identify storms that are producing a tornadoes, or about to produce a tornado. Continue reading
Category: Meteorology, Phenomena, Severe Weather, Weather Dangers
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