When it hits
Day 44 on the 
Wage Slave's run
Warned on day 42 by 
Cold Wave Warning, 2 days ahead.
Starts with Cold Wave Strikes, ends with 
Cold Wave Passes.
The same on every run: Student, Warehouse Manager
What comes
No zombies: this crisis is about the weather, sickness or pests, not a siege.
From the game files1
Crisis 112
| id | 112 |
|---|---|
| CrisisID | 112 |
| StartEvent | [40651] |
| EndEvent | [40652] |
| ForecastEvent | [40688] |
| ForecastStyle | 1 |
| Des | Crisis_Des_112 |
| Des_Local | 寒潮 |