Rensselaer Republican, Volume 18, Number 29, Rensselaer, Jasper County, 25 March 1886 — Extent and Velocity of Storms. [ARTICLE]

Extent and Velocity of Storms.

Prof. E. Loomis finds that in the United States a low pressure area, with Only one system of cyclonic winds, frequently has a diameter of 1,600 miles, and thatcyclones over the Atlantic frequently have diameters of 2,000 miles. Widespread areas of low’ barometer, haring several centers of cyclonic action, may have a diameter of 6,000 miles or may even form a belt extending nearly, if. not quite, round the globe between the parallels of 40 and 50 degrees north latitude. On the other hand, tropical cyclones are often only 500 miles, or even less, in diameter. In the United States, the signal service records, for thirteen yeans show that the average -rate of progress of storms for the year is 28.4 miles per hour, rising’to the maximum. 34.2 miles, in February, and falling to the minimum, 22.6 miles, in August. In Europe storins travel much more slowly, the mean rate of progress during the five years ending 1880 being 16.7 miles,.peaching the maximum of 19 miles in October, and falling to the minimum of 14 miles in August.