thereʹs been a lot of news recently about nacreous clouds, also called “mother-of-pearl” clouds for their pearlescent look. another name for them is pscs, for polar stratospheric clouds.weʹve been seeing them at palmer for the past month. theyʹre here almost every winter, but i donʹt know that theyʹve ever been seen this early (last year the first sighting was sept 19th). 
a bigger version of the same image is here: http://iceboard.org/pictures/nacreous2.jpg