1008 1004 1000 996 



7a.m. (e.s.t.) 20 FEBRUARY 1972 



■ INDICATES TIME AND LOCATION 

 OF LOW PRESSURE CENTERS 



\ WINDSPEED AND DIRECTION 



1000 ATMOSPHERIC PRESSURE IN MILLIBARS 



Figure 74. Surface weather map, 20 February 1972 (National Oceanic 

 and Atmospheric Administration, 1972). 



90 



