| 
 | 
| Probability Scale |  
| Chance of Happening | Value | 
 | Chance of Happening | Value |  
| Extremely Low | 10% |  | 
Medium-High | 60% |  
| Very Low | 20% |  | High | 
70% |  
| Low | 30% |  | Very High | 
80% |  
| Medium-Low | 40% |  | 
Extremely High | 90% | 
 
| Medium | 50% |  | Certain | 
100% |  
 
Note that all probabilities refer to the occurrence of 1-min sustained wind speeds.
 | 
*Note that the windspeed scale used here is the Saffir-Simpson hurricane wind scale. This differs from wind scales used by regional agencies other than the National Hurricane Center. The category applied to a storm on this site may differ from the category applied by an official regional meteorological agency.