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Category Archives: Phenomena
What is mud rain?
Mud rain is rain that contains a noticeable concentration of particles of sand or dust. The soil can be of local origin or it can originate from very distant regions. As rain falls through the dust layer, the raindrops collect … Continue reading
What is the longest lightning bolt?
The World Meteorological Organization, or WMO, investigates and certifies meteorological records.
On Friday, a WMO committee of experts confirmed a new world record for the longest single lightning flash. The single flash occurred on Oct. 31, 2018 and covered a horizontal distance of 440.6 miles, plus or minus 5 miles, across parts of southern Brazil. Continue reading
Category: Meteorology, Phenomena, Severe Weather
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What was that stuff that fell on Thursday?
On Thursday, many locations in southern Wisconsin experience snow squalls in which the falling precipitation was momentarily quite intense.
This event was an example of shallow convection – as opposed to the deep convection of summertime thunderstorms. Thursday’s shallow convection was spawned by a conspiracy of circumstances occurring at different levels in the atmosphere. Continue reading
Is the reduction in air traffic affecting the weather?
The COVID-19 pandemic has caused a reduction in air traffic. This reduction has had at least two impacts so far, one relating to the exhaust from aircraft engines and the other to weather forecasts.
Exhaust from aircraft engines can be seen sometimes as condensation trails, or contrails. The exhaust of an aircraft contains both gas and tiny particles called aerosols. Both of these are important in the formation of contrails. Contrails form when water vapor condenses and freezes around the small particles that exist in aircraft exhaust. Continue reading
Will spring temperatures affect the COVID-19 outbreak?
The COVID-19 outbreak continues to expand across the U.S. and globally. What happens when spring and warmer weather arrives?
Some viral respiratory diseases, such as influenza, are seasonal, and cases decrease in the spring and summer. However, we do not know what to expect from the new coronavirus that causes COVID-19. Continue reading
Category: Meteorology, Phenomena, Weather Dangers
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