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Yosemite Sam
Yosemite Sam, Jack of All trades
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I have heard of heat lighting, but is there heat thunder

Customer Question

I have a bet with my wife that heat thunder does happen. Please show/tell me that it does
Submitted: 11 years ago.
Category: General
Expert:  Yosemite Sam replied 11 years ago.




Sorry to say their is no such thing as Heat Thunder



WHAT IS HEAT LIGHTNING?





by METEOROLOGIST JEFF HABY





If a lightning strike is a sufficient distance from the observer, sound from the strike will not be heard. These
silent bolts are called heat lightning. Lightning bolts produce thunder, but the thunder sound does not travel
all the way to the observer if the observer is too far away.



The movement of sound in the atmosphere depends on the atmospheric properties of the air such as temperature
and density. Because temperature and density change with height, the sound of thunder is refracted through
the troposphere. This refraction results in spaces of volume in which the
thunder does not propagate through.



The sound of thunder often reflects off the earth's surface. The rumbling sound from thunder is partly due
to reflections off the earth's surface. This reflection and refraction leaves voids where
thunder can not be heard.



The earth's curvature also contributes to people far from the strike from not hearing it. Thunder is more
likely to be bounced off the earth's surface before it reaches an observer far from the strike. With
this said, the right refraction and reflection can result in people on the earth's surface being able
to hear thunder at very far distances from the storm. The reflection and refraction in the troposphere
determines who hears the strike and who doesn't.



The term "heat" in heat lighting has little to do with temperature. Since heat lightning is most likely to be
seen in association with air mass thunderstorms in the warm season, the term "heat" may have been used because
these flashes are often seen when surface temperatures are warm.




















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