unusual weather phenomena

8/9/2019 Unusual Weather Phenomena

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Moon Bows - A rainbow is caused by the Sun shining onmoisture droplets, most commonly in a post-rain atmosphere.

A moon bow is much rarer, only seen at night when the moon

is low and full to almost full. One popular place to see moonbows is at Cumberland Falls in Kentucky.


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Mirages - Mirages occur when light is refracted to produce an

image of an object or the sky where it is not. It is most commonly

seen on hot surfaces, such as the pavement or a desert.


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Haloes - Like rainbows, haloes are formed around the Sun due to moisture (in

this case ice crystals) being refracted from the Sun rays in the upper atmosphere.

Sometimes two or more areas of the circle or arcs surrounding the Sun will be

brighter, forming what are called Sun Dogs. Haloes can also form around the

Moon, and occasionally around the brighter stars and planets like Venus.


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Belt of Venus - The belt of Venus is a phenomenon that occurs during dustyevenings when a band of pinkish or brownish sky will appear between the sky and

the horizon.


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Noctilucent Clouds - Noctilucent clouds are atmospherically high clouds that

refract light at dusk when the Sun has already set, illuminating the sky with no

seeming light source.


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Aurora Borealis - Also known in the southern hemisphere as the Aurora Australis,

the Aurora Borealis are charged particles from the Sun that have reached the

Earths upper atmosphere and become excited. They are more typically seen closerto the poles and during the equinoxes of the year.


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Colored Moon - Due to different atmospheric issues, the moon will occasionally

appear tinged with a color, such as blue, orange, or red. Excess smoke, dust, andeclipses can cause the moon to change color


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Mammatus Clouds - These odd-shaped clouds are often associated with a

storm front, especially one involving a thunderstorm. Its not completelyunderstood how they form


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Pyrocumulus Clouds - Another heat related phenomenon, pyrocumulus clouds

form from the fast and intense heating of an area to create convecture, which in

turn creates a cumulous cloud. Volcanoes, forest fires, and nuclear explosion (in

the form of a mushroom cloud) are all prime causes of pyrocumulus clouds.

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Fire Rainbow - A fire rainbow is an extremely rare phenomenon that occurs only

when the sun is high allowing its light to pass through high-altitude cirrus clouds

with a high content of ice crystals.


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Green Ray - Also known as the Green Flash. This occurs very briefly before total

sunset and after sunrise. It appears as a green flash above the sun that lasts very

briefly, generally only a few moments. It is caused by refraction of light in theatmosphere.


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