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On the evening of July 23rd, Alan Birdsell spotted noctilucent clouds over western Spokane.
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These clouds are located much higher (about 50 miles) than the typical clouds (0-12 miles). They are most frequently visible at higher latitudes (50-70N) during the summer. They are composed entirely of ice and typically are invisble during the day. The best time for viewing them is after sunset during the twilight hours.
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