Low-Level Jet

A core of relatively high wind speeds, typically centered at altitudes ranging between 300 and 3000 feet above the ground, on occasion as high as 7000 feet.

• Frequently associated with strong wind events that can produce moderate to severe wind shear and mechanical turbulence.
• Produces head and tail winds at different heights that can affect aircraft spacing on arrival.
• Produces cross winds which affect runway selection and airport arrival rates.
• Can play a role in sustaining convection.
• May enhance the possibility of freezing precipitation due to the transport of warm air into the mid levels.
• Reduction in visibilities (due to heavy rain, snow, and blowing snow) can be more severe in the presence of a low-level jet.