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  2. Polar vortex set to freeze the U.S. as far as the Deep South

    www.aol.com/polar-vortex-set-freeze-u-013449946.html

    During the winter months and when the jet stream allows, this cold air can drop farther down into lower latitudes like in the United States. This is forecast to happen as soon as this weekend.

  3. Jet stream - Wikipedia

    en.wikipedia.org/wiki/Jet_stream

    The northern polar jet stream is the most important one for aviation and weather forecasting, as it is much stronger and at a much lower altitude than the subtropical jet streams and also covers many countries in the northern hemisphere, [38] while the southern polar jet stream mostly circles Antarctica and sometimes the southern tip of South ...

  4. Coldest January since 2011 brewing for US to lead to multiple ...

    www.aol.com/weather/much-colder-potentially...

    But then, as the jet stream dip continues to evolve, the Arctic Express will kick into high gear during the first full week of January. "The first large and long-tracking Arctic high pressure area ...

  5. Freak winds in Atlantic jet stream push commercial planes to ...

    www.aol.com/freak-winds-atlantic-jet-stream...

    The Atlantic jet stream is a fast and narrow current of air flowing from west to east and encircling the globe and is widely used by airplanes traveling east from North America to cut down on ...

  6. Effects of the El Niño–Southern Oscillation in the United ...

    en.wikipedia.org/wiki/Effects_of_the_El_Niño...

    During El Niño, the jet stream is oriented from west to east across the southern portion of the United States, making the region more susceptible to severe weather outbreaks. During La Niña, the jet stream and severe weather are likely to be farther north than normal. [17]

  7. SIGWX - Wikipedia

    en.wikipedia.org/wiki/SIGWX

    The SIGWX charts only show the forecast for the specific hour, however it is common place for parameters such as the JetStream, CAT & CB to be interpreted +/- 3 hours of the chart validity time. . Prognoses are typically prepared for two ranges of heights: SWH - High Level SIGWX (Flight level 250-630) SWM - Medium Level SIGWX (Flight level 100-450)

  8. Cold front plunges into South Florida this weekend aided by ...

    www.aol.com/cold-front-plunges-south-florida...

    Cold weather forecast for other parts of Florida. ... Contributing to the pending chill is a significant dip in the jet stream, which on Tuesday was raging over the southeastern United States from ...

  9. Pineapple Express - Wikipedia

    en.wikipedia.org/wiki/Pineapple_Express

    A Pineapple Express is driven by a strong, southern branch of the polar jet stream and is marked by the presence of a surface frontal boundary which is typically either slow or stationary, with waves of low pressure traveling along its length. Each of these low-pressure systems brings enhanced rainfall.