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Mick McGuire Christina Henderson Kelly Ranae Giedd-James.

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Presentation on theme: "Mick McGuire Christina Henderson Kelly Ranae Giedd-James."— Presentation transcript:

1 Mick McGuire Christina Henderson Kelly Ranae Giedd-James

2 Event Forecast Event ObservedMarginal Total YesHits (a) False Alarms (b)a+b NoMisses (c) Correct Neg. (d) c+d Marginal Totala+cb+d a+b+c+d =n Total

3 Event Forecast Event ObservedMarginal Total YesHits (a) False Alarms (b)a+b NoMisses (c) Correct Neg. (d)c+d Marginal Totala+cb+d a+b+c+d =n Total http://www.bom.gov.au/bmrc/wefor/staff/eee/verif/Finley/Finley_Tornados.html

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6 http://www.nws.noaa.gov/mirs/public/prods/reports/pdf/office_facility/10-507_cwfa_counties(cr).pdf

7 Past storm reports http://www.spc.noaa.gov/climo/online/http://www.spc.noaa.gov/climo/online/

8 Past storm reports http://www.spc.noaa.gov/climo/online/http://www.spc.noaa.gov/climo/online/ % DAYS SWX MJJA 2004-2008

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10 % PCPN SWX MJJA 2004-2008

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15 POD = Hits / (Hits + Misses) 30% 25% 20% 15% 10% 5% % % % %

16 POD = Hits / (Hits + Misses) ____ of the events that occurred were predicted to occur % % % % % % % % % % %

17 FAR = False Alarms / (Hits + False Alarms)

18 ____ of the forecasts for swx turned out to be false alarms

19 There was a ___% improvement in forecast accuracy when compared to random chance

20 POD = Hits / (Hits + Misses) ____ of the events that occurred were predicted to occur % % % % % % % % % % % % %

21 POD = Hits / (Hits + Misses) % % % % % % % % % %

22 FAR = False Alarms / (Hits + False Alarms) ____ of the forecasts for swx turned out to be false alarms

23 FAR = False Alarms / (Hits + False Alarms) ____ of the forecasts for swx turned out to be false alarms

24 POD = Hits / (Hits + Misses) ____ of the events that occurred were predicted to occur % % % % % % % % % %

25 POD = Hits / (Hits + Misses) ____ of the events that occurred were predicted to occur % % % % % % % % % % % %

26 POD = Hits / (Hits + Misses) ____ of the events that occurred were predicted to occur % % % % % % % %

27 FAR = False Alarms / (Hits + False Alarms) ____ of the forecasts for swx turned out to be false alarms

28 FAR = False Alarms / (Hits + False Alarms) ____ of the forecasts for swx turned out to be false alarms

29 There was a ___% improvement in forecast accuracy when compared to random chance

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