Jet Stream and Weather

ITEM BANK:

warm north to south jet stream cold west to east wind current

In the US our weather is governed by the . The high-altitude, fast flowing that moves from . The jet stream separates cold Arctic air to the north from warmer air to the south. Usually, if you’re north of the jet stream, the weather will be ; and if you’re to the south, it will be . If the jet stream is passing above your location, it’s probably raining or snowing. The jet stream isn’t straight; it’s wavy in the direction, with peaks and troughs. The farther north and south these peaks and troughs extend, the more extreme the temperatures vary.