Below, I have posted about the United 777′s encounter with severe turbulence in the anvil of a thunderstorm over Missouri earlier this week.
I have been asked, “what do you mean, ‘anvil’?” Good question.
Here is a drawing of a blacksmith’s anvil. Note it is flat and wide at the top.
Here is a photo of a thunderstorm (technically, a cumulonimbus cloud) with the anvil shape. We refer to the large flat cirrus top of the storm as the “anvil.”