Monthly Weather Review Volume 21 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...taken daily at 8 a. m. and 8 p. m. (75th meridian time), is shown on Chart II by isobars. Chart V exhibits the normal distribution of atmospheric pressure and prevailing wind-directions over the United States for July. The publication of the charts of this series is preliminary to the publication by the Weather Bureau of specially prepared data and charts showing meteorological and climatic features and conditions of the United States. In July there is usually an increase of pressure, except over extreme northeast and northwest portions of the country, the most marked increase occurring between the Mississippi River and the Rocky Mountains, where the normal pressure is.05 or more higher than for the preceding month. In July, 1893, the mean pressure was highest over the east Gulf states and the Florida Peninsula and along the immediate Pacific coast north of the 40th parallel, where it was above 30.05, and the mean readings were above 30.00 south of the Ohio River and east of Oklahoma and Texas. The mean pressure was lowest over the Gulf of Saint Lawrence and the upper Saskatchewan valley and over the west part of the southern plateau region, where it was below 29.80, and the mean values were below 29.85 over northern Maine and on the northeast slope of the Rocky Mountains. The mean pressure was also below 29.85 from the western portion of the southern plateau region over Utah and Nevada. A comparison of the pressure chart for July, 1893, with that of the preceding month shows a decrease of pressure over the middle Atlantic and New England states, the Canadian Maritime Provinces, the eastern lake region, and from the Pacific coast over the northern Rocky Mountain region. Over interior and southern districts the mean pressure was higher than for the preceding...