Although not set in stone here are some basic guidelines.

•  Rising Barometer:  Fishing is Best

•  Rapidly Fluctuating:  Indication of good fishing (regardless of fluctuating up or down).

•  Static Barometer:  Fishing is poor

•  Falling Barometer:  First part of fall is good fishing. After the fall continues for several hours, the more the it goes down the poorer fishing will be.

•  Unusually Low Barometer:  Don't bother as there is no fishing.