![]() What cloud indicates an approaching bad weather?Ĭumulonimbus clouds – thunder clouds that have built up from cumulus clouds. They often stretch for miles across the sky and may have finger (non rotating) like clouds reaching toward the ground. (KEYC) – A shelf cloud is a long wedge shape cloud that forms on the leading edge of a squall line or multi-cluster storm system. This particular storm system was fed by a heat dome over the eastern United States. What’s a derecho storm?Ī derecho, pronounced deh-REY-cho, is a long-lived, fast-moving thunderstorm that causes widespread wind damage. Hail, high winds and tornadoes could accompany any severe thunderstorms that develop. Meaning: Strong thunderstorms are likely and severe storms are possible. These are sometimes called anvil clouds because of the way the upper-level winds shear the tops of the clouds and push them to one side. While they are not themselves dangerous, like a wall cloud, tail clouds are often indicative of severe weather and potential tornadic activity. They are often bent on an axis that is not quite horizontal and not quite vertical. ![]() Tail clouds look like a funnel or tornado in many ways. What do clouds look like before a tornado?
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