_4_ COLD FRONT 

 _^ WARM FRONT 

 -^-4. OCCLUDED FRONT 



ISOBARS 



i WIND DIRECTION AND 

 VELOCITY 



-(ST LOHCITUDC 



Fig. 3.— Weather conditions prevailing at 6:30 A.M., C.S.T., October 31, 1955; shown are pressure areas, isobars, fronts, 

 and wind directions and velocities as reported by the United States Weather Bureau. 



14 



