Slide (460 kb) - Met Office

Verification of CDPAll UK stations T+0 to T+36 at 6 hourly intervals in period22/1/08 to 14/4/08• Shower/no shower (from 99249 surface reports, 18% of whichobserved a shower at VT)• BIAS: CDP = 29% NAE = 141%• Percent Correct: CDP = 81% NAE = 70%• Hit Rate: CDP = 13% NAE = 38%• False Alarm Ratio: CDP = 54% NAE = 73%• ETS: CDP = 0.071 NAE = 0.068• Odds Ratio CDP = 4.2 NAE = 2.0• Low Hit Rate and Bias:• Use max(CDP, NAE) for each MOGREPS member© Crown copyright Met Office MOSAC Paper 13.9, 14 Nov 2008