The measurement of the amount of internal energy a substance contains. Temperature is the most measured quantity in the atmosphere.
In general, the relationships between heat and other properties such as temperature, pressure, density, etc. In forecast discussions, thermodynamics usually refers to the distribution of temperature and moisture (both vertical and horizontal) as related to the diagnosis of atmospheric instability.
The sound that follows a flash of lightning and is caused by sudden expansion of the air in the path of the electrical discharge.
A local storm produced by a cumulonimbus cloud and accompanied by lightning and thunder. Types include the Single Cell Thunderstorm, the Multicell Thunderstorm, the Supercell Thunderstorm and the Squall Line.
A violently rotating column of air, usually below a cumulonimbus, with circulation reaching the ground. A tornado may be accompanied by a visible funnel extending part or all of the way to the ground.
According to the National Weather Service, a tornado emergency is an exceedingly rare tornado warning issued when there is a severe threat to human life and catastrophic damage from an imminent or ongoing tornado.
A tornado vortex signature (TVS) is a NEXRAD weather radar detected rotation algorithm that indicates the likely presence of a strong mesocyclone that is in some stage of tornadogenesis.
A tornado warning is issued by a local National Weather Service Office when a tornado has been sighted or is indicated by radar. The warning will include the time and location of the tornado and a description of the area affected including any towns or cities in the area. A tornado warning means that people [...]
A tornado watch is issued by the Storm Prediction Center in Norman, Oklahoma when conditions for the formation of tornadoes are expected in and close to the specific area outlined in the watch. A tornado watch normally issued for a period of 4-8 hours. A tornado watch means people in or near to the affected [...]