I've seen mammatus clouds before, in 2011, in Brighton. I was standing in the parking lot of the Whole Foods, along with a lot of other people, just staring at the sky, and then I realized that while I didn't know what those clouds were, they probably weren't good. There were a lot of warnings up -- that was the day that the tornado hit Springfield.

Mammatus are cool but freaky

By Tim Mc. on Tue, 03/08/2022 - 6:21pm.

I've only seen them once, and not a really clear version, but it was pretty wild to see the sky look like that.

They're indeed undulatus asperatus clouds

By The Frying Pan of Reality on Tue, 03/08/2022 - 1:06pm.

Damn, that's a great picture. Look at all that turbulence up there.

Kicking myself for missing these. I looked out the window at the wrong time and saw fast moving scud instead, with a mix of other clouds. I saw these once over Harvard Square a few years ago. So amazing.

Anyway, here's some cool some stuff about them:

https://www.weather.gov/sgf/events_2010jun7
https://cloudatlas.wmo.int/en/clouds-supplementary-features-asperitas.html

That time of year!

By SwirlyGrrl on Wed, 03/09/2022 - 7:40pm.

I can remember heading out to UMass to collect my youngest for Spring Break and seeing nifty clouds like this.

From my home office, I now think of a quilt-batting sky as a feature of early spring.

In case anyone is interested, these clouds and all clouds have a really cool fan base called the Cloud Appreciation Society - https://cloudappreciationsociety.org/

Their mission is to push back against the banality of blue-sky thinking!

Good gravy, those clouds are wavy

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