If you love doing outdoor activities or taking part in extreme sports then a NOAA weather radio is an important object to carry around. That is because you will need to know at all times what the weather condition are and what the forecasts are. If you are out on a mountain in the snow and a blizzard is predicated you want to know that so you can evacuate. A weather hygrometer is also necessary but it only works for the moisture in the air and humidity. Knowing how to make your own weather hygrometer is important because you can always determine what the humidity is and how this affects your job. Another idea is to buy a digital hygrometer and always have it on hand. That means when you want to know the level of moisture in the area you simply check with your digital thermometer. But, if you do not have that type of technological advancement you may make your own decisions. For example, if you are out competing in any extreme sport you will want to have your digital hygrometer close by in order to tell what the temperature is, level of humidity, and more.