If low pressure systems bring WARM air and bad weather, why does it always feel colder when it is stormy out? Why do low pressure system supposedly bring warm air?
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A low pressure system is a cyclone, meaning it rotates counter-clockwise in the Northern Hemisphere. So, the front side of the low brings up warm, air from the south. The back side of the low brings cold, usually dry air from the North. See picture here:
http://images.usatoday.com/weather/photo…
In-between these two different air masses is what's called a front. It is literally the front side of air-mass. So a cold front is the front side of a cold air mass (blue line with blue arrows on my image above). These fronts are what bring precipitation (rain, snow, thunderstorms. When a low pressure system moves over you, first you feel warm air being drawn up from the south, then the cold front passes bringing precipitation, and then cold air comes in behind it.
Also, since evaporation is a cooling process, whenever there is a thunderstorm with lots of rain, the rain begins evaporating near the surface and the temperatures drop.
http://images.usatoday.com/weather/photo…
In-between these two different air masses is what's called a front. It is literally the front side of air-mass. So a cold front is the front side of a cold air mass (blue line with blue arrows on my image above). These fronts are what bring precipitation (rain, snow, thunderstorms. When a low pressure system moves over you, first you feel warm air being drawn up from the south, then the cold front passes bringing precipitation, and then cold air comes in behind it.
Also, since evaporation is a cooling process, whenever there is a thunderstorm with lots of rain, the rain begins evaporating near the surface and the temperatures drop.
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the bad weather is at the front of the warm air. The water is probably cooler than the air it is bringing, so the precipitation probably temporarily lowers the temperature in a stormy area before the warm air raises the temp