CURRENT

A horizontal movement of water, such as the Gulf Stream off the east coast of North America, or air, such as the jet stream. CUT-OFF HIGH A warm high which has become displaced and is on the polarward side of the jet stream. It occurs mostly during the spring and is most frequent over northeastern Siberia, Alaska, and Greenland. It is an example of a blocking high. CUT-OFF LOW A cold low which has become displaced and is on the equatorward side of the jet stream. It frequently occurs during the spring and is often located over the southwestern United States and along the northwestern coast of Africa.