Spokane WA - Idaho Circumhorizon Arc III

Last updated on September 16, 2023

Spokane WA - Idaho Circumhorizon Arc III: A Spectacular Atmospheric Phenomenon

On June 3, 2006, residents of Spokane, Washington, and nearby Post Falls, Idaho, were treated to a breathtaking display of atmospheric optics known as the "Great Spokane Display." The event showcased the mesmerizing beauty of a Circumhorizon Arc, also referred to as a Fire Rainbow. These stunning images were captured by Lisa Schorzman and continue to captivate viewers with their ethereal allure.

A Circumhorizon Arc is a type of halo that forms in the Earth's atmosphere when sunlight interacts with ice crystals suspended in the air. This particular phenomenon occurs when the sun is high in the sky, usually during the summer months, and its rays pass through thin cirrus clouds composed of hexagonal ice crystals. As light enters these ice crystals, it undergoes refraction and dispersion, resulting in a vivid spectrum of colors.

The Circumhorizon Arc appears as a vivid band of vibrant hues, resembling an upside-down rainbow. Its name is derived from its characteristic shape, as it forms a complete or partial circle parallel to the horizon. This optical phenomenon is often mistaken for a rainbow due to its striking colors and arc-like appearance, but it is important to note that they are distinct phenomena caused by different mechanisms.

The unique atmospheric conditions required for a Circumhorizon Arc to occur contribute to its rarity. These conditions involve the presence of high-altitude cirrus clouds with an optimal alignment of ice crystals. Additionally, the sun must be at a specific angle in relation to the clouds to create the necessary refraction and dispersion of light. Consequently, sightings of this phenomenon are relatively infrequent and highly dependent on specific geographical and meteorological factors.

The "Great Spokane Display" of June 3, 2006, stands out as a particularly remarkable instance of the Circumhorizon Arc. The images captured by Lisa Schorzman showcase the arc's vibrant colors and its impressive span across the sky. These photographs provide a glimpse into the awe-inspiring beauty of atmospheric optics and serve as a reminder of the wonders that can unfold above us.

The occurrence of a Circumhorizon Arc offers a valuable opportunity for scientific study and appreciation of the intricate workings of our atmosphere. By examining the properties of the ice crystals involved and the specific atmospheric conditions required, researchers can deepen their understanding of the physics behind this phenomenon. Furthermore, such events serve as a reminder of the delicate balance within our natural environment and the interplay between sunlight, clouds, and ice crystals.

In conclusion, the "Great Spokane Display" of June 3, 2006, brought the mesmerizing beauty of a Circumhorizon Arc to the forefront of public consciousness. This awe-inspiring event allowed residents of Spokane, Washington, and nearby Post Falls, Idaho, to witness firsthand the ethereal allure of this atmospheric phenomenon. The stunning images captured by Lisa Schorzman continue to captivate viewers, serving as a testament to the captivating wonders that can unfold in our skies. As we marvel at these displays, we are reminded of the intricate workings of our atmosphere and the delicate interplay between sunlight, ice crystals, and clouds that give rise to such remarkable optical phenomena.

More views of the "Great Spokane Display" of June3, 2006.

Lisa Schorzman captured these spectacular images from nearby Post Falls Idaho.

Images ©Lisa Schorzman.

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