review the material found here - JoCo Serve

Characteristic
Ranking
Definition
2 12-24 Hours
1 24+ Hours
Duration
4 More Than 1 Week
3 Less Than 1 Week
2 Less Than 1 Day
1 Less Than 6 Hours
* Based on history, using the definitions given, the likelihood of future events is quantified.
** According to the severity associated with past events or the probable worst case scenario possible in the state.
Using the rankings described in Table 3.1, the following formula is used to determine each
hazard’s CPRI.
(Probability x .45) + (Magnitude/Severity x .30) + (Warning Time x .15) + (Duration x .10)=CPRI
Based on their CPRI, the hazards were separated into three categories of planning significance:
High (3.0-4.0), Moderate (2.0-2.95) and Low (1.1-1.95). These categories determin the level of
analysis given to a hazard in subsequent the risk assessment process; they do not suggest that
a hazard would have only a limited impact. In order to focus on the most critical hazards, those
assigned a level of high or moderate significance were given more extensive attention in the
remainder of this analysis (e.g., quantitative analysis or loss estimation), while those with a low
planning significance were addressed in more general or qualitative ways.
Hazards, and their corresponding CPRI ranking were reviewed and verified by all members of
the planning committee during the plan update. The hazard ranking was based on the CPRI for
the Region as a whole, followed by the county. Table 3.2 indicates the ranking established by
the Region using the method described above.
Table 3.2 Region L Hazard Rankings
Hazard Type Probability Magnitude Warning Time Duration CPRI
Planning
Significance
Regional CPRI
Tornado 4 4 4 1 3.70 High
Flood 4 3 3 4 3.55 High
Winter Storm 4 3 2 3 3.30 High
Windstorm 4 2 3 2 3.05 High
Utility/Infrastructure Failure 4 1 4 3 3.00 High
Drought 4 2 3 4 2.95 Moderate
Hazardous Materials 4 1 4 2 2.90 Moderate
Lightning 4 2 2 1 2.80 Moderate
3.4