This is the 12734th most frequent German word.
wintereinbruch
Sudden onset of winter weather.
Wintereinbruch is used here to denote a sudden arrival or onset of winter conditions.
Der plötzliche Wintereinbruch überraschte viele Autofahrer.
The sudden burst of winter surprised many drivers.
Wintereinbruch refers to the event triggering necessary responses, such as snow clearing.
Nach dem Wintereinbruch mussten alle Straßen erst geräumt werden.
After the onset of winter, all roads had to be cleared first.
This usage highlights the unexpected timing of a winter phenomena.