UPDATE (3:15pm) - The Wyoming Department of Transportation reopened Interstate 90 between Sheridan and Buffalo at approximately 1:30 pm.
Conditions are slick with limited visibility. Motorists are reminded to slow down and drive with caution.
This will be the 27th year, according to the organizers, that upwards of 100 to 125 hardy souls will brave snowy weather and icy waters in nothing but bathing suits to prove...well, only they know why they do it!
Rob Forister has been organizing the plunge for the last ten years.