On the evening of July 23rd, Alan Birdsell spotted noctilucent clouds over western Spokane.
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.
www.weather.gov 
