Noctilucent clouds, unpredictable yet spectacular apparitions perched on the edge of space. Broadcast meteorologist Jeff Forgeron, out of Portland, called the display “incredible.”TIME LAPSE: Incredible display of noctilucent clouds over Portland & Vancouver this morning. Noctilucent clouds remain illuminated after dark because of their extreme altitude — a whopping 50 miles above the Earth’s surface. Noctilucent clouds shine over Richland, Wash., on Tuesday (Scott Butner/SpaceWeather.com)Frigid temperatures are instrumental in spawning noctilucent clouds. What a glorious pre-sunrise Noctilucent Clouds display we had here just out of Seattle in Kent, WA.

Source: Washington Post June 24, 2020 18:56 UTC