Source Weekly

Buying winter gear can be intimidating. Winter hardware, like skis and snowboards, has seen some dramatic changes in the last two decades. Winter apparel, on the other hand, tells a different story. Industry insiders like Doug Hoscheck, one of the creators of Polar Fleece, say apparel has basically been the same for the last 30 years. The only real differences are in style and color. While the technological changes in hardware are fairly complex, the science behind how apparel keeps you warm is actually pretty simple. It comes down to two main things: layering and breathability (how your clothing manages moisture and perspiration).

The Jet Stream:
What the hell is it?
* A corridor of fast-moving air that separates the cold air in the north from the warm air in the south that determines where storms form and where they move.
*Composed of wind currents high in the atmosphere (20,000 feet)
*During cold fronts, the jet stream bends south, but stays above the warm-cold boundary. In summer, the jet stream moves north toward Canada.
*Jet streaks are faster winds surrounding the jet stream that have a major effect on the location of storms and precipitation.