Monthly Archives: November 2013

Are tornadoes typical in the Midwest during this time of year?

No, although in the U.S. tornadoes have occurred in nearly every state and in every month of the year. Wisconsin has reported a tornado in every month except February. There have been nine confirmed tornadoes in Wisconsin during November between the years 1844 to 2012. Continue reading

Category: Severe Weather

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Why does the wind diminish after sunset?

A reader wrote us last week with two questions prompted by careful observation: 1. Why does the wind speed tend to decrease after sunset? 2. Why does this effect seem less pronounced in late autumn and winter? Continue reading

Category: Meteorology

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Does a cold end to October signal an early winter?

October ended up to be about normal in terms of temperature despite the chilly last couple of weeks. In fact, 14 of the last 17 days of the month were at or below normal. A natural question arises in the face of this cool spell — namely, does this portend a cold start to the winter? Continue reading

Category: Seasons

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What was that dashed line in the sky on Nov. 3?

If you watch jets fly high above, you may notice that sometimes white clouds trail them. These condensation trails are called contrails. Most clouds form as air rises. Contrails form by a mixing process that is similar to the cloud you see when you exhale and “see your breath”. Continue reading

Category: Phenomena

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