At what altitude is the polar jet stream typically located near latitude 45-55?

• A. 20,000 ft
• B. 25,000 ft
• C. 30,000 ft
• D. 35,000 ft

Answer: (C)

The polar jet stream is typically found at altitudes ranging from about 25,000 to 35,000 feet, with an average altitude near 30,000 feet at latitudes of 45-55 degrees. This high-altitude, fast-moving air current plays a significant role in weather patterns and influences the development of systems such as low and high-pressure areas.

At these latitudes, where the polar and temperate air masses meet, the jet stream can be particularly pronounced due to the steep temperature gradients associated with this boundary. The specific height of the jet stream can vary based on factors like the season and atmospheric conditions, but the commonly accepted average places it around 30,000 feet in these latitudes. Understanding the altitude of the polar jet stream is crucial for predicting weather and for aviation planning, as it can significantly impact flight paths and atmospheric stability.