document updated 9 years ago, on Dec 22, 2014

If you have a barometer with you, then being aware of falling pressure can be useful:

surface weather analysis — high-pressure and low-pressure maps
isobars — used to convey pressure on maps
low-pressure area — a confined area, smaller than a front; associated with cyclones or developing cyclones
- high and low pressure systems
weather front — ctrl-f for "pressure"; there's a complex relationship between pressure and fronts
pressure gradient