When isobars turn a sharp corner around a High they form what is called a ridge of high pressure, which is often shaped like a tongue extending from the High centre.

The weather in a ridge is like the weather in the high.

When isobars make a bend around a Low, this bend area is called a trough of low pressure or simply a trough.

Troughs are also often shaped like tongues and usually contain weather similar to lows and fronts.

(A col is the name for the area of light variable winds that lies between two neighbouring pressure systems. Often this area contains either fog or thunderstorms.)