Category Archives: Meteorology
As we head into the second half of August a subtle transition in our weather begins to occur — one that is probably hard to detect at first but that eventually becomes very obvious and then lasts for approximately eight … Continue reading
In a recent interview on the Glenn Klein Show on WRJN radio, U.S. Sen. Ron Johnson, R-Oshkosh, asserted that “the climate hasn’t warmed in quite a few years … that is proven scientifically.”
This statement is entirely untrue but echoes a line of argument that many climate change and global warming skeptics have introduced into the discussion for a number of years. The so-called “global warming hiatus” argument suggests that since the beginning of the present century there has been a slower rate of increase in the global average surface temperature than climate models suggested would be the case. Continue reading
A heat wave is a period of abnormally and uncomfortably hot and usually humid weather. The World Meteorological Organization is specific in its definition by stating that a heat wave is when the daily maximum temperature for more than five consecutive days exceeds the average maximum temperature by 9 degrees.
Heat waves are caused by very hot, stagnant air masses. Regions that suffer under intense hot spells are usually dominated by a surface high-pressure system with a mid-tropospheric ridge aloft. Dew points are also high, and to compound matters, wind speeds are often low. Continue reading
Wind is air moving from areas of high atmospheric pressure to low pressure. Violent destructive winds, as well as gentle summer breezes, result from a complex interplay of different forces.
One of these forces results from a pressure gradient, or how fast pressure changes over distance. Continue reading