wall cloud


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Related to wall cloud: Shelf cloud

wall cloud

A well-defined bank of vertically developed clouds with a wall-like appearance, often dropping below the level of the general overcast.
References in periodicals archive ?
Satellites can show the clouds, their temperature and moisture content, but it takes a spotter to see the wall cloud forming beneath the anvil shape of a thunderhead that often precedes a tornado - the last one in Lane County hit Creswell in 1999.
They learn about specific types of could formations, like wall clouds, that are an imminent sign a tornado is about to form," Mr.
WORCESTER - About 75 weather enthusiasts got the lowdown on squall lines, shelf clouds, wall clouds and supercell thunderstorms last week at a National Weather Service Skywarn spotter training class at the National Guard Armory on Skyline Drive.