UDC 551.M)6.1:551.6M(73) WEATHER AND CIRCULATION OF SEPTEMBER 1973 Record September Precipitation in the Great Plains and Rocky

• Main Author: Robert E. Taubensee-national
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Pacific; ural mountains
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.1907; http://docs.lib.noaa.gov/rescue/mwr/101/mwr-101-12-0901.pdf

the Atlantic and Pacific Oceans. The strength of the The mean 700-mb circulation over the Northern Hemiridges, coupled with well-developed troughs to the north, sphere in September 1973 was characterized by three produced fast, zonal 700-mb flow across mid-latitude prominent amplified waves over middle and higher latitudes (figs. 1, 2). Mean troughs extended from oceanic areas (fig. 3). Wind speeds averaged 6 to 9 m/s polar Lows into the North Pacific Ocean, along the east faster than normal along the axis that stretched across coast of North America and near the Ural Mountains. the Pacific Ocean from China to near the United States. Accompenying ridges were located across western North Wind speeds were not quite as strong along the axis that America, over western Europe and in eastern Asia. originated in the central United States, but did average Subtropical ridges were stronger than normal around 3 to 6 m/s above normal. FIGURE 1.-Mean 700-mb contours in dekameters (dam) for September 1973. December1973 J 901FIGURE 2.-Departure from normal of me&n 700-mb height in