Warning: Extreme Population Impacted > 5,000,000Wnter Storm Severity Index Day 1 population and area (km2) information
| Severity | Population | Area (km2) |
| Limited | 62,049,800 | 352,646 |
| Minor | 37,546,400 | 70,184 |
| Moderate | 25,182,200 | 35,895 |
| Major | 9,756,850 | 17,614 |
| Extreme | 5,109,230 | 4,379 |
Warning: Extreme Population Impacted > 5,000,000