| A cumulonimbus has drifted over the spires of downtown, where it hangs like a vast gray anvil. |
| The ITCZ corresponds to the equatorial trough and is the mechanism that helps generate the deep cumulonimbus clouds through convection. |
| Pilots usually try to avoid cumulonimbus, or thunder clouds, by flying around or above them. |
| Clouds run the gamut here, from the menacing cumulonimbus of an approaching storm to the fluffy white paradisiacal cumuli of a fair-weather day. |
| Amateur meteorologists will recognize the cumulonimbus, a thunderstorm cloud characterized by the anvil shaped top. |
| The top of a cumulonimbus cloud is often capped by cirrus, which is why the anvil of a thundercloud is often brilliant white. |
