What is Aleutian low pressure?

A semi-permanent, subpolar area of low pressure located in the Gulf of Alaska near the Aleutian Islands. It is a generating area for storms and migratory lows often reach maximum instensity in this area. It is most active during the late fall to late spring.

What causes the Aleutian Low?

The circulation pattern shifts during the Northern Hemisphere summer when the North Pacific High takes over and breaks apart the Aleutian Low. This high-pressure circulation pattern strongly influences tropical cyclone paths.

What are the characteristics of low pressure?

A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.

What are semi-permanent highs and lows?

Semi-permanent highs and lows are persistent pressure systems that appear over an area throughout the year. The winds around these pressure systems can steer weather patterns and affect how storms and weather systems enter the United States.

When does high pressure take over the Aleutian Low?

The circulation pattern shifts during the Northern Hemisphere summer when the North Pacific High takes over and breaks apart the Aleutian Low. This high-pressure circulation pattern strongly influences tropical cyclone paths.

What is the meaning of the Aleutian Low?

1. Introduction The Aleutian Low is a climatic feature centered near the Aleutian Islands on charts of mean sea- level pressure (SLP). It represents one of the main ‘‘centers of action’’ in the atmospheric circulation of the Northern Hemisphere.

Where is the Aleutian Low in the Bering Sea?

A large Aleutian Low in the Gulf of Alaska on October 24, 2011. The Aleutian Low is a semi-permanent low-pressure system located near the Aleutian Islands in the Bering Sea during the Northern Hemisphere winter.

When does the Aleutian Low change its circulation pattern?

However, there is significant variability in these measurements. The circulation pattern shifts during the Northern Hemisphere summer when the North Pacific High takes over and breaks apart the Aleutian Low. This high-pressure circulation pattern strongly influences tropical cyclone paths.