Uploaded February 2025 | Updated September 2026, 2 weeks ago
NOAA's Global Forecast System is predicting another deep dip of the jet stream into the United States over the January 18 weekend. The dip, known as a "trough" in weather terms, is downstream of a "ridge" of high pressure over Alaska. In our latest Polar Vortex blog, our experts talk about whether this pattern could be related to the behavior of the stratospheric polar vortex. NOAA Climate.gov animation based on a screen recording of the Earth Null School website.
NOAA's Global Forecast System is predicting another deep dip of the jet stream into the United States over the January 18 weekend. The dip, known as a "trough" in weather terms, is downstream of a "ridge" of high pressure over Alaska. In our latest Polar Vortex blog, our experts talk about whether this pattern could be related to the behavior of the stratospheric polar vortex. NOAA Climate.gov animation based on a screen recording of the Earth Null School website.
