On Friday morning Lake Zumbro’s water temp was 54-55 degrees with cloudy skies and significant wind. We found crappies up near their spawn areas, primarily male fish. The males for the most part had not gotten tar black yet but were turning….more than they had shown earlier in the week. The male fish had very little tail damage from fanning beds and a couple of big hen fish we caught I brought home to check the spawn’s development, which was apparently getting real close to getting watery loose. Friday afternoon saw temps in the 70’s and Saturday was slightly cooler, near 68-69, but another banner day for temps so I think the spawn got started on the lake. Fast forward to this morning.
Since we were quite dry here, the forecast rain was welcomed. Forecast amounts of course are always a big guess, however our late weather last night said .5 to 1.5″. At 4 AM my electronic gauge was at .61″. At 8 AM the gauge showed 1.84″ and the radar is showing heavy rainfall possible in the next three or four hours. Cascade Creek behind the house has come up some but I think will rise much more when water from outlying areas gets into it. The Zumbro River is always slower to show a visible reaction to heavy rain but its already up some. All of this will heady straight to Lake Zumbro where two other branches of the Zumbro River system will merge at Oronoco then merge again with the south branch coming from Rochester. All this water is going to be much cooler and dirty from fresh field run-off and the lake will come up. How much? We’ll have to wait out the rain to see how much falls in the whole of the watershed.
If the male fish were just beginning to fan beds, I think this rise will push them back to deeper water until this passes and the cooler water will just prolong the hen’s spawn development a while. But if this water comes AFTER spawning got under way, those nests already full of eggs will likely smother with silt if the males can’t keep them cleared. On the Zumbro the larger crappies are always the first to dump eggs. The larger fish is where the strongest genetic chain lies, so I am hoping that nests hadn’t been used yet. Crappies can hold back the spawn for several weeks if conditions aren’t right.
Right now its a waiting game to see what the lake does. These high water events seem to be an annual menace at this time of the year in more recent years. AS mentioned before, we were very dry in this region so hopefully much of this excess rain can be sucked up by the ground since much of the land is opened up for planting. At the same time the extra water carries the expose dirt to the lake where its needed the least. Its definitely going to be interesting to see how all of these factors play into this year’s crappie production.