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 thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...
The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...
The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...
A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....
A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...
Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...