I've been feeding fish in shallow fresh water ponds and lakes for 28 years. Just before the passage of a front, fish feed like crazy. During the passage of a front, they feed well.
That goes along with my thinking. I think an advancing storm stimulates fish to gorge in preparation for muddy water and scant food that results from it. Catfish may gorge in preparation for a spawn, which I guess a big rain could stimulate.
