How can a series of synoptic weather maps be used to predict the future location of a low pressure center?

A series of synoptic weather maps help us to predict the future location of low-pressure systems by tracking the direction of the wind, the front locations, and the centers of high pressure, and also the location of the jet stream and how strong it is. The synoptic weather maps are used to acquire a complete photo of the place under surveillance. Along with computers, the maps are used to define a forecast. 

6 cos 34, 6 sin 34 trig

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more