A Moon Ring can be seen tonight above Upper Peninsula skies.
A 22° halo is an optical phenomenon that occasionally forms around the moon. It’s also known as a moon ring or winter halo. It forms when light is refracted in millions of randomly oriented hexagonal ice crystals suspended in the atmosphere.
As no light is refracted at angles smaller than 22° the sky is darker inside the halo. A 22° halo may be visible on as many as 100 days per year.
In folklore, moon rings are said to warn of approaching storms. Like other ice halos, 22° halos appear when the sky is covered by thin cirrus clouds that often come a few days before a large storm front.
The similar phenomenon called coronas are produced by water droplets and they are much smaller and more colorful than 22° halos.