So the snow came in huge, amazing quantities. Then the temperature started to increase, and the snow mostly melted. People went back to work.
The temperature increased a little further. Some rain fell. And then, the weather came back with its next little joke…
The temperature fell once again into negative territory. And all that water turned to black ice.
The is the way the ground looked after having been gritted earlier in the day. All realistic efforts were made to make the ground as safe as possible, but it was still treacherously slippery.