In relation to wind speed maximum, where is maximum divergence and cloud typically found for a jet streak in upper-level westerly flow?

• A. NW and SE
• B. NE and SW
• C. N and S
• D. E and W

Answer: (B)

In the context of upper-level westerly flow associated with a jet streak, maximum divergence and cloud formation are typically found in the northeast and southwest quadrants of the jet. This phenomenon occurs due to the strong wind speeds found within the jet streak and the resulting atmospheric dynamics.

When considering the jet streak, the area of maximum wind speed is located in the core of the jet. Immediately downstream in the atmosphere (to the northeast), there is a region of divergence where the air is spreading out. This divergence leads to rising air, which is conducive to the development of cloud cover and precipitation. Conversely, immediately upstream (to the southwest) of the jet streak, the flow is converging, leading to sinking air and clear skies.

The orientation of cloud formation and divergence being in the northeast and southwest quadrants is crucial for weather prediction, especially in relation to developing systems and potential turbulence associated with the jet stream dynamics. Understanding these relationships helps meteorologists forecast changes in weather patterns associated with jet streaks.