29K views · 901 reactions | A sped up timelapse video of clouds rising out of Great Gulf and over Mt. Clay while the summit was experiencing an unusually long period of easterly winds. This was captured near sunset looking northward from the summit. Early in the video, you can see on the left side a small lenticular cloud forming on the lee side of Mt. Clay, while a mid-level cloud deck originating from an offshore low spreads in from right to left. | Mount Washington Observatory | Facebook