| When the thundercloud reaches the cumulonimbus stage and hits the tropopause, the jet stream tugs the cloud into a recognizable anvil shape. |
| Then the truth fell on him like a thundercloud, and he hurried back to the house for good. |
| The top of a cumulonimbus cloud is often capped by cirrus, which is why the anvil of a thundercloud is often brilliant white. |
| As you pointed out, it takes about 800 million volts to get lightning to jump between a thundercloud and the ground. |
| Oh, yeah, we were still in a thick thundercloud with periodic flashes of lightning surrounding us. |
| This enables the creation of an upward leader from the terminal that propagates towards the downward leader coming from the thundercloud. |
