Altostratus, exactly 5:47:54 pm on February 18th, Boulder CO

By Jason Brownstein for Spring 2014 Clouds First.
Read the Report

Altostratus, exactly 5:47:54 pm on February 18th, Boulder CO

Panorama of altocumulus lenticularis, mountain wave clouds, 5:35pm MST on Tuesday, February 18, 2014, Boulder CO.

Altostratus lenticularis, 2/18/14, 5:15 pm

Altocumulus standing lenticularis cloud time lapse, with images taken at 2 second intervals. Boulder, CO, 2:00 PM on February 18th 2014

Mountain wave clouds, Estes Park CO, February 18, 2014 at 12:28 P.M.

Altocumulus on February 18, 6:15 am, Boulder CO.

A contrail catches the last sun above altocumulus, 2/17/14, Boulder CO.

Mountain wave clouds, 5:11 MST on February 17, 2014, Boulder Co.

Altostratus undulatus, 3:15pm on Monday, February 17th 2014.

Mountain wave cloud, Sunday, February 16th, 3:45 pm, Centennial, CO.