246 MONTHLY WATHER REVIEW DECEMBEB 1952 THE WEATHER AND CIRCULATION OF DECEMBER 1952'

• Main Author: Harry F. Hawkins
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Gulf of Alaska; Canada; North Atlantic; Alaska
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.7724; http://docs.lib.noaa.gov/rescue/mwr/080/mwr-080-12-0246.pdf

heights over the United States were not far from normal, The monthly mean contours at 700 mb ' for December adjacent areas, especially the Gulf of Alaska, Canada, and 1952 (fig * '1 indicate that the important North American southern Greedand, had departures. A features included: a low latitude trough off the Californias, vigorous Gulf of Low was accompanied by heights ridge conditions from Utah northward through Alberta, FIGURE 1.-Mesn 7OO.mb. height contours and departures from normal (both labeled in tens of feet) for Novemher %December 28, 1952. Note unusual intensity of Gulf of Alaska Low and continued (from November) blocking over North Atlantic. DECEMBEB 1952 MONTHLY WEATHER REVIEW 247 420 ft. below normal at 700 mb. and pressure 16 mb. below normal at sea level (chart XI inset). Fronts and cyclones emanating from this center of action repeatedly traversed Canada and the northern United States (chart X). The sea level mean map for the month (chart HI) shows the effects of this activity of maritime origin in the presence of a zonal trough across central Canada and in the lack of the more customary extension of polar high