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Upper Air and Development

In general, the development of weather systems over Kent will be driven by the upper winds which circulate around the earth.  The mathematics and dynamics of these processes is complicated but after much work development areas can be related to the pressure pattern at 30 000ft or so. 

The study of the mathematics is very rewarding and brings together the conservation of momentum (and angular momentum), Newton's Laws and the rotation of the Earth.

For the moment, the following images show the relationship of the 300mb contour chart with convergence and divergence.  The fact that air cannot be created or destroyed in the flow means that:


Apply the rules in these images to the lates 300mb chart at the bottom of the page will give you an insight into current atmospheric dynamics, you can then check your understanding by comparing with the latest forecast sequence from the UK Meteorological Office

The Convergence / Divergence Rules




The Latest 300 mb Contour Chart




The Latest Forecast Sequence From the UK Meteorological Office