What is Clear?
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility. Clear sky. In meteorology, this term is also used when the cloud cover is less than 1/8 during the day or at the observation hour.
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A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...
Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...
A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...
A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...
The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...
The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....
The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...