Page:Dictionary of aviation.djvu/238

 214 DICTIONARY OF AVIATION

storm ste:zm n. a disturbance of the normal condition of the atmosfere characterized by winds of unusual direction or force, or by rain, snow, hail, or otherwise; a tempest; spe- cifically, a wind (numberd n in Beaufort's wind^scale) having a velocity of about 30 meters per second; also, an area of low barometric pressure; a cyclone.

cyclonic storm, a storm that accompanies, or is caused by, a cyclone; a low^area storm.

electrical storm, a condition of the wether or atmosfere occurring in regions of dry air, as at hight altitudes jn the western United States, when light shocks and tingling sen- sations are felt, and brushes and sheets of light are seen en various objects; a violent disturbance of the electrical con- dition of the earth characterized by strong earth^currents, as thru telegraf^lines, occurring eftenest when auroras and sun-spots are frequent; an electric storm.

electric storm, same meaning as electrical storm.

Espy's theory of storms, the theory advanced by Espy that storms are due to the evolution of heat by the condensation of the moisture of ascending air.

eye of a storm, the calm region or part at the center of a violent cyclonic storm, tuhere the clouds clear away and blue sky appears, to be observd chiefly in the tropics.

highzarea storm, a storm associated with an area of high barometric pressure.

land storm, a storm which occurs on or over the land : distinguisht from ocean storm.

law of storms, the law that the center of a storm or hurri- cane from any given point may be roughly calculated (ac- cording to a certain formula) from the average rate at uuhich the barometric pressure is falling; the law of hurri- cane^distance.

lowiarea storm, a storm associated with an area of low barometric pressure; a cyclonic storm.

magnetic storm, an abrupt and usually widespred disturb- ance of the equilibrium of the magnetic fenomena of the earth causing the magnetic needle to oscillate and become displaced, and often accompanied by electric earth^currents and sun-spot frequency.

ocean storm, a storm which occurs n or over the ocean; a storm at sea : distinguisht from land storm.

revolving storm, a cyclone.

storm-approach 'st:zm-3,psr>ot$ n. the approach or en- coming of a storm or of storms. storm-area 'sto:zm,e:-zi-9 n. the area coverd by a storm or

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