The National Weather Service reports wind as a peak gust in miles per hour. The severe-thunderstorm-warning threshold is 58 mph; damage potential rises sharply above it.
| Category | Measurement | Typical property impact |
|---|---|---|
| 40–57 mph | Below severe threshold | Loose debris, small limbs down |
| 58–74 mph | Severe threshold | Shingle loss, siding and fence damage, larger limbs down |
| 75–99 mph | High-end severe | Roof damage, downed trees, possible structural damage |
| 100 mph+ | Extreme | Significant structural damage likely |