<![CDATA[Unusual cloud formation over the Azores today.]]>846767e8-e973-471a-8103-4a68751978f8-image.png

Can anyone explain what this is?

]]>https://community.windy.com/topic/31590/unusual-cloud-formation-over-the-azores-todayRSS for NodeThu, 16 Jul 2026 19:30:07 GMTSat, 24 Feb 2024 20:39:01 GMT60<![CDATA[Reply to Unusual cloud formation over the Azores today. on Sun, 25 Feb 2024 07:53:27 GMT]]>@gkr1959
This cloud pattern is the phenomenon called gravity waves as explained here:
https://www.weather.gov/source/zhu/ZHU_Training_Page/Miscellaneous/gravity_wave/gravity_wave.html
with many examples:
https://svs.gsfc.nasa.gov/14445/

These atmospheric waves appear when wind aloft flow over a mountain. In your screenshot you see these waves spreading as a plume on the leeward side of the mountainous Azores islands.

]]>https://community.windy.com/post/180605https://community.windy.com/post/180605Sun, 25 Feb 2024 07:53:27 GMT