Frost tubes show signs of spring
March 14, 2019
ONTONAGON — The thaw has begun. Wednesday will be the first day of spring.
The partial thaw of three frost tubes located on three Ontonagon County highways was recorded by the Ontonagon County Road Commission Wednesday.
The tubes are located on U.S. 45 in Woodspur, U.S. 45 near Bruce Crossing and M-64 between White Pine and Bergland.
One week ago the tubes were frozen solid, to 58 inches in Woodspur, 56 inches near Bruce Crossing and 64 inches between White Pine and Bergland. Those readings were made by the commission on March 6 when the temperatures were 2 degrees below zero in Woodspur,...