UNDATED (KDAL) - With several days of temperatures above the freezing mark, the Minnesota DNR is reminding everyone to be cautious when traveling on frozen lakes, ponds or rivers. Above normal temperatures can make ice brittle and conditions can change in a short period of time. DNR recommendations are for a minimum of 4 inches of clear ice for walking, 5 inches for ATV or snowmobiles, 8 to 12 inches for a car and 12 to 15 inches for a medium sized truck. When temperatures rise above freezing for six hours in a 24 hour period, people should double the recommended thicknesses.
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