WHOLE VOL. 



LAT. 40 N. 



547 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 40° N. Long. 30° W. 



950 mb. + 



Lat. 40° N. Long. 20° W. 

 950 mb. + 



Mean 71.4 70.6 66.8 66.0 67.6 68.8 69.1 68.4 68.3 68.2 67.7 69.9 68.6 



