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It seems that the day after a heavy snow is usually slow. Is it the snow or just that a big front has passed?
Astute observation Asch! Fish activity level under river ice drops after a passing front which is usually accompanied with a rising barometer. This becomes more and more pronounced as the winter session wears on too.
Barometric pressure in the winter session correlates well to water level in the spring session. Rising water in the spring just as rising barometric pressure in mid winter usually spells a tough river bite for many species. Fish can be caught in both situations but it takes more effort. “Spot on spot” timely presentations are essential to bury hooks.
Like many….I peak at the forecast before going out fishing. In the open water period my primary concerns are radar and wind speed/direction. In December (first/early ice) I’m looking at wind speed/direction. In Jan & Feb, I’m looking at the barometric pressure trend and wind speed/direction. In March (last ice) wind speed/direction.
My best luck in the mid winter session has been fishing against a stable or slowly falling barometric pressure.