SEA LEVEL ATMOSPHERIC PREaSfWE 

 (MOMTHLY MEAN) 



MAfiCH 1964 



FROM U.8.W.B. CHARTS 



Figure 58. — Mean sea level pressure, March 1964. 



SEA LEVEL ATMOSPHERIC P RCS S yC 

 (MONTHLY MEAN) 



APRIL 1964 



PROM U.S.W.B. CHARTS 



Figure 59. — Mean sea level pressure, April 1964. 



65 



