Ever wonder why we go from a warm day to chilly night?
Solar radiation heats the ground during the day.
At night, heat escapes back towards space.
Acting as a ‘blanket’, the clouds can re-emit some of that heat back to the surface. In this case, a warm day can lead to a fairly warm night.
On clear nights the radiation escapes into space, creating cooler temperatures. This is called ‘radiational cooling.’ On a cold day, losing what heating we had, can lead to a frigid night.
Very cold temperatures can lead to hypothermia. Hypothermia is caused by prolonged exposures to very cold temperatures. When exposed to cold temperatures, your body begins to lose heat faster than its produced.
Signs of hypothermia include confusion, shivering, difficulty speaking, sleepiness and stiff muscles.
Another cold weather concern, frostbite. Frostbite is an injury caused by freezing of the skin and underlying tissues.
Symptoms include tingling and stinging. Your skin turns numb and feels cold and stiff. You’ll notice blisters and discoloration.
You can get frostbite even if you’re wearing gloves and other clothing.
Really cold weather can freeze bodies of water, but you need to know ice thickness guidelines to stay safe. (Clear ice only.)
Two-inches or less of ice, stay off. Not safe.
Four-inches and you can go ice fishing.
Five-to-six, you can scoot across the lake on your snowmobile or ATV.
Eight-to-12 will support a small car or truck.
Twelve-to-15 will support a medium size truck.
But you need 25-to-52-inches to support a woolly mammoth.

Link to learn about hypothermia and frost bite. https://www.cdc.gov/disasters/winter/staysafe/hypothermia.html

Ice thickness safety. https://www.dnr.state.mn.us/safety/ice/thickness.html