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Optical Effects
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Cumulus congestus reaching its ceiling at the point of a layer of stratocumulus, spotted near Mt. Vernon, Washington, US
Undulatus at sunrise over Lake Stevens, Washington, US
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Crepuscular shadows during sunset over the Olympic Mountains, as seen from Lake Stevens, Washington, US
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Circumhorizon Arc along with virga in the distance, spotted while driving on I-90 in Montana, US
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A colorful mosaic over Lake Stevens, Washington, US
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Cirrus vertebratus homogenitus, which developed from the remnants of a contrail, spotted over Lake Stevens, Washington, US
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Lunar halo and corona over Stanwood, Washington, US
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A reflection of a mature cumulus congestus, developing towards a potential cumulonimbus, near Anacortes, Washington, US
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22-degree halo is seen as the sunlight is refracted through the ice crystals of thin layers of high clouds, such as cirrostratus in this case. Note how it 'ceases to exist' where there are no thin layers of clouds present. This example was spotted over Lake Stevens, Washington, US.
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Undulatus over Lake Stevens, Washington, US
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22-degree halo over Lake Stevens, Washington, US
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