| By :
Roger Brown
If you're in the market for watches with altimeters, you probably know that all of them have some mild weather predicting capability. Even if your watch itself does not have the explicit ability to do trend analysis, you can use the barometric pressure function and your understanding of the parameters that reflect changing weather to do some weather predicting of your own. To do this you need to understand the way barometer works. Barometric pressure is simply the reflection of the weight of the outside air in your vicinity. Simply put, if pressure is high then you're weather is likely to be good. However if your pressure is low you weather will likely not be good. If your weather is trending in the negative direction, it is likely that the barometric pressure will correlate nicely with that and will be on a downward trend. Conversely, if pressure is rising, that means that you're in for a term of good weather in the near future. Knowing the simple things about how barometer works can allow you to make a fairly precise forecast of impending weather conditions in your area. If you learn these simple rules it is quite possible for you, with the aid of watches with altimeters, to become a de facto weatherman: Again, if your barometric pressure is on the increase, that is normally a signal that your weather is going to be peaceful and not contain a lot of moisture in the near future.The rapidity of change is a big indicator of how quickly weather will beset you. If barometric pressure is dropping slowly the weather might not be so bad. However, if you're seeing a rapid change in barometric pressure than that means the weather sky get nasty very serve probably in the form of some sort of precipitation, like rain or snow. This is really interesting - if you get a sustained period of barometric pressure increase and then a sharp upward spike in pressure, you are in for some really stark changes in your weather. If everything is going along fine in your weather is perfect, and then you see some sort of change in pressure trending, that probably means you're going to have a quick fall in your barometric pressure reading on your altimeter watch and lousy weather is in the offing. If you're in the middle of a storm and all of a sudden the pressure spikes afterwards, then you're probably coming out of it - at least for short length of time. It's amazing that all this information can be obtained from watches with altimeters. Certainly, there are a number of other functions these watches have that will be of benefit to you but weather prediction can be of enormous help when you're out in the wilderness without having access to the Internet or local news.
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