Black ice is hard to spot and hazardous for drivers.
SEATTLE — Black ice, which can also be called gray ice, is hard-to-see ice on the roadway and causes slick conditions for drivers.
The road may look normal or even a little wet when there are patches of black ice on top.
It forms when temperatures fall below 32 degrees Fahrenheit and there is already rain, snow, or slush on the roadway, causing the liquid to refreeze. It’s especially prevalent in the early morning hours when snowmelt has refrozen on surfaces overnight.
The phenomenon can also form when there’s freezing rain, which
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