A storm-track, as usually shown on weather maps and on the well-known Pilot Chart of the North Atlantic Ocean, published by the U.S. Hydrographic Office, represents the path of the centre of the storm; that is, of the point of lowest barometer. This point coincides, in the great majority of cases, with the centre of the whirling winds that make up the cyclone. Anyone who has had regular or even casual access to such publications must have noticed that storm-tracks are sometimes very irregular, and that occasionally an actual loop is represented. The question is often asked whether the facts justify such a track, and undisguised incredulity is sometimes expressed as to the possibility, or at least probability, of such erratic movements. In the case of storms that occur over the land, where regular observations are taken at numerous and well-selected stations, it is very easy to locate the storm-centre at frequent intervals of time and space, and thus, by joining such points in chronologic order, plot the storm-track with unquestionable accuracy. The fact is thus brought out very clearly that the tracks of land storms do often form loops.
A Loop in the Track of an Ocean Storm
Ensign Everett Hayden