SIOUX FALLS, S.D. (KELO) — It’s good to see the ice out there on our local ponds and lakes, especially considering how tough last winter was for outdoor activities that involved snow and ice. Though it’s been pretty cold at times in KELOLAND, winter sports enthusiasts may want to pump the brakes on getting out on the ice.
The general rule of thumb is that ice needs to be at least four inches thick to support an average human’s weight. In general, a pond needs to have four days of below freezing temperatures to achieve this thickness…assuming a freeze rate of one inch per day. This is also assuming ideal water conditions where the water is still, there’s little to no wind, and undercurrents don’t disturb the circulation of colder temperatures.
Since no two ponds or lakes are exactly alike, you’ll want to take more time to let the ice thicken…to the tune of two or so weeks with below-freezing temperatures if possible. From there, visual checks can be made. If you can see air pockets within the ice, trapped snow, or cracks, then the ice is not ready. Blue-colored ice is structurally stronger than white ice, with the latter being formed by those air pockets and other imperfections.
Be sure to take several samples of the ice’s thickness when it’s safe to do so. Currents and wind patterns can cause ice to form unevenly…so it’s best to look at multiple areas along the ice to ensure that it’s safe. We have some cold weather on the way through the rest of the week, so that will certainly help.
