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Hazards Assessment Verification
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| Hazards Assessment Verification for Severe Storms |
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| This page updated on 10/31/2008 |
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| The Contingency Table |
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| Where A=Number of Correct Forecasts, |
| B=Number of Incorrect Forecasts, |
| C=Number of Times Event Occured when no Forecast was Made, |
| D=Number of Times Event did not Occur when no Forecast was
Made |
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| Contingency Table for Latest Forecast (Made on:20081016): |
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| Cumulative Contingency Table: |
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Hit Rate = (a+d)/(a+b+c+d)
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Threat Score = (a)/(a+b+c) |
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| Probability of Detection = (a)/(a+c) |
False Alarm Rate = (b)/(a+b) |
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| Bias = (a+b)/(a+c) |
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