There are two physical differences between Low pressure systems and High pressure systems.
First, is the circulation surrounding them.
Secondly, is the atmospheric motion that they cause.
Low pressure systems circulate counter-clockwise.
High pressure systems circulate clockwise.
These "motions" (caused by these circulations) are the building blocks in our atmosphere. They give us our weather.
A Low?s counter-clockwise circulation forces air upward (ultimately resulting in condensation, cloud formation and ultimately precipitation).
A High?s clockwise circulation causes a sinking motion in the atmosphere, resulting in fair/clearer and often sunnier skies.
- - Company president stores hazardous waste, faces charges
- - PHOTOS: Truck's trailer fails to clear railroad overpass
- - Police event makes wish come true for boy battling cancer
- - Smoke detectors donated in honor of boy, 9, who died in East Coventry fire
- - Police need public's help to find alleged QNB bank robber
- - Pizza delivery driver shot at East Stroudsburg University
- - Police investigate early-morning shooting at East Stroudsburg University
- - Pennsylvania Gov. Wolf lights Capitol Christmas tree
- - State police investigating stolen hunting rifle
- - Holiday fundraiser grants 9 families the Christmas of their dreams
|Record||61°F December 11, 1979||-2°F December 11, 1958|