The cloud base (or the base of the cloud) is the lowest altitude of the visible portion of the cloud. It is traditionally expressed either in m or feet above mean sea level (or planetary surface), or as the corresponding pressure level in hectopascal (hPa, equivalent to millibar).
Read more about Cloud Base: Measurement, Weather and Climate Relevance
Famous quotes containing the words cloud and/or base:
“Let chaos storm!
Let cloud shapes swarm!
I wait for form.”
—Robert Frost (1874–1963)
“They must to keep their certainty accuse
All that are different of a base intent;
Pull down established honour; hawk for news
Whatever their loose phantasy invent
And murmur it with bated breath....”
—William Butler Yeats (1865–1939)