THE WEATHER AND CIRCULATION OF APRIL 1968 Cool in the West and Warm in the East

• Main Author: James F. Andrews
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1968
• Subjects: Baffin Bay; Pacific; Tilting; Baffin
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.3071; http://docs.lib.noaa.gov/rescue/mwr/096/mwr-096-07-0472.pdf

considerably in April and became a lower latitude feature. Marked changes in 700-mb. anomalous height from Retrogression also occurred over North America, pri-March to April 1968 (fig. 1) accompanied retrogression marily in response to strong ridging in the eastern Pacific. of several long wave features at middle and high latitudes As the ridge over the Canadian Rockies moved to the over the Pacific and North America. The greatest change occurred in the eastern Pacific where heights increased coast a deep trough developed over mid-North America, by as much as 180 m. As the westerlies here moved north- tilting strongly to the southwest (fig. 1 and 2). Middle ward in April the deep trough which had been over the and high latitude portions of this trough had been along eastern Pacific in March (fig. 1 of [l]) retrograded to the the East Coast and mean Low in Baffin Bay in March. mid-Pacific and was replaced by a strong middle latitude A ridge prevailed over the eastern United States in April, ridge (fig. 2 and 3). At the same time the full latitude replacing cyclonic flow of the previous month. FIGURE 1.-Mean 700-mb. height anomaly change (decameters) from March to April 1968. ~ ~