Shelter Tech

Cloud "avalanche"


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Corvallis, Oregon
This raises so many questions:

It's obviously not an avalanche but rather an atmospheric density current of some sort. I get as far as cold clear air ponded over the lake valley, but what is driving the convection as the current descends? For that matter, what started the current and keeps it going until gravity takes over? And why is warm humid air racing into a cold well like that anyway, with apparently not any wind blowing in the area (apart from the current)?

Nepal is not known for its volcanoes or tropical weather, and from the blue sky above, the local weather conditions aren't humid and the barometer is high. I'm guessing the moisture originated at some distance, near or at the Himalayan front facing India, but...

...Oh, just so many questions!

But what an amazing experience for them. :cool:
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