What Do Weathermen Mean by High Pressure and Low Pressure?  

High pressure is when the weather man forgot his anniversary - low pressure is when he treated his wife to a day at the spa and quiet candle light dinner for two for no reason at all.

Isn't it the worst when high and low pressure systems meet - bad weather such as tornado here in Michigan when that happens.

hello

i am not a weather man but here is some information on both high pressure and low pressure...i hope that you enjoy it.

High Pressure - did you know?

A high, high-pressure cell, or high pressure area is a region where the atmospheric pressure is greater than the surrounding area. In some countries, these regions may be referred to as anticyclones. Highs are frequently associated with light winds and subsidence. Subsidence will generally evaporate most cloud droplets after less than 500 meters, due to adiabatic heating. Thus, high pressure typically brings clear skies. During the day, since no clouds are present to reflect sunlight or reflected infrared, there is more incoming shortwave solar radiation and temperatures are higher in the summer and lower in the winter. At night, the absence of clouds means that outgoing longwave radiation (i.e. heat energy from the surface) is not absorbed, giving cooler diurnal low temperatures in all seasons.

Low Pressure - did you know?

Low pressure areas form when an airmass warms, either from being over a warm land or ocean surface, or from being warmed by condensation of water vapor in large rain or snow systems. The warming causes the air layer to expand upward, becoming slightly thicker. This expansion then causes air in the upper troposphere to flow away, leaving less mass, and so less weight (pressure) at the surface. The lower pressure air at the surface then causes higher pressure air around it to flow toward lower pressure, but as it does, the rotation of the Earth turns the wind to the right, resulting in the counter-clockwise wind flow around low pressure (in the Northern Hemisphere...it flows in the opposite direction in the Southern Hemisphere).




related resource: water cooler