Daily and hourly element changes like barometric pressure, wind, temperature and sky conditions have a drastic effect on the movement and activity of fish! As a rule . . . good fishing weather will hold a high steady barometer with mild winds of a southerly direction. Excellent fishing weather conditions usually occur prior to, and as a frontal system in moving into an area after a period of stable weather. It usually brings with it rain, a sharply falling barometer and westerly winds! A low & steady barometer means fish will become more active. A rising barometer means fish will become more active.
On the other hand, there is a system called a "cold front" & this virtually kills good fishing! When the wind changes to a northerly direction & the air & water temperatures drop sharply, the fishing is going to be real tough for 24-48 hours. A cold front typically follows a storm and is often recognized by mile high blue skies & strong, gusting northerly winds! After a cold front passes through, fishing will continue to improve until the next one hits. A cold front makes fish spooky & drives them into deep water and heavy weed cover where they become inactive & very hard to catch!