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Authorities identify man who died in fiery crash on Interstate 29 south of Grand Forks

Weather Talk: Above and below average are not balanced

It seems the weather gets cold for a while and then warms up again, or it snows a lot and there is a flood before the weather goes dry. Back, forth, up, down; weather is always changing from one side of average to the other.

This can happen on a timescale of a few days, but it can also happen on a timescale of weeks, months, years or even longer.

There is a general misconception that these ups and downs balance out over time, but they do not. Long-term weather records show that weather is distinctly nonlinear. Over short and long periods of time, such as days and weeks or decades and centuries, the warm spells do not completely balance out the cool spells. Likewise, wet weather is not balanced by drought.

This means that our concept of "average" is of limited usefulness.

John Wheeler

John was born in Baton Rouge, LA, and grew up near Birmingham, Alabama. As a teenager, his family moved to Madison, Wisconsin, and later to a small town in northeast Iowa. John traces his early interest in weather to the difference in climate between Alabama and Wisconsin. He is a graduate of Iowa State University with a degree in meteorology. Like any meteorologist, John is intrigued by extremes of weather, especially arctic air outbreaks and winter storms.  John has been known to say he prefers his summers to be hot but in winter, he prefers the cold.  When away from work, John enjoys long-distance running and reading.  John has been a meteorologist at WDAY since May of 1985.

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