Wall Cloud Vs. Shelf Cloud
Some storms contain shelf clouds, which are often mistaken for wall clouds, since an approaching shelf cloud appears to form a wall made of cloud. Generally, a shelf cloud appears on the leading edge of a storm, and a wall cloud is usually at the rear of the storm, though small, rotating wall clouds (a feature of a mesovortex) can occur within the leading edge on rare occasion. Wall clouds are inflow clouds and tend to slope inward, or toward the precipitation area of a storm. Shelf clouds, on the other hand, are outflow clouds that jut outward from the storm, often as gust fronts.
Read more about this topic: Wall Cloud, Structure
Famous quotes containing the words shelf, wall and/or cloud:
“The shelf life of the modern hardback writer is somewhere between the milk and the yoghurt.”
—John Mortimer (b. 1923)
“When all this is over, you know what I’m going to do? I’m gonna get married, gonna have about six kids. I’ll line ‘em up against the wall and tell them what it was like here in Burma. If they don’t cry, I’ll beat the hell out of ‘em.”
—Samuel Fuller, U.S. screenwriter, and Milton Sperling. Samuel Fuller. Barney, Merrill’s Marauders (1962)
“Misfortune is never mournful to the soul that accepts it; for such do always see that every cloud is an angel’s face. Every man deems that he has precisely the trials and temptations which are the hardest of all others for him to bear; but they are so, simply because they are the very ones he most needs.”
—Lydia M. Child (1802–1880)