| Clue | Source | Date |
|---|---|---|
| Extreme-weather restriction, perhaps | LA Times Daily | 18 Feb 2019 |
| Extreme-weather restriction, perhaps | The Washington Post | 18 Feb 2019 |
| Extreme-weather restriction, perhaps | ||
| Blizzard restriction, perhaps | LA Times Daily | 16 Feb 2017 |
| Blizzard restriction, perhaps |