The Brunton Atmospheric Data Center Summit is a pocket-sized unit that gives you an array of weather information from wind speed to barometric pressure. Fickle weather and microclimates can wreak havoc on your backpacking skiing or climbing trip. The Brunton ADC Summit tracks the climate where you are and reports on an incredible array of conditions including temperature wind chill wind speed and barometric pressure. It even examines trends and then forecasts the coming 12-hours of weather. The ADC Summit features a storm alarm that goes off if the barometric pressure drops--a sweet feature if your view of incoming weather is blocked by the peak you're trying to summit. An altimeter alarm tells you when you've broken a set altitude as you stumble up a Colorado Fourteener and a ski run counter is a fun feature to have on the slopes. Standard features like time day and date come included along with a chronograph and race timer.