APPENDIX A

Table 1: Summary verifications of the authors prior three seasonal forecasts of Atlantic TC activity (1999-2001).

		Update	Update	Update
1999	5 Dec 1998	7 April	4 June	6 August	Obs.
No. of Hurricanes	9	9	9	9	8
No. of Named Storms	14	14	14	14	12
No. of Hurricane Days	40	40	40	40	43
No. of Named Storm Days	65	65	75	75	77
Hurr. Destruction Potential(HDP)	130	130	130	130	140
Major Hurricanes (Cat. 3-4-5)	4	4	4	4	5
Major Hurr. Days	10	10	10	10	15
Net Trop. Cyclone Activity	160	160	160	160	193
		Update	Update	Update
2000	8 Dec 1999	7 April	7 June	4 August	Obs.
No. of Hurricanes	7	7	8	7	8
No. of Named Storms	11	11	12	11	14
No. of Hurricane Days	25	25	35	30	32
No. of Named Storm Days	55	55	65	55	66
Hurr. Destruction Potential(HDP)	85	85	100	90	85
Major Hurricanes (Cat. 3-4-5)	3	3	4	3	3
Major Hurr. Days	6	6	8	6	5.25
Net Trop. Cyclone Activity	125	125	160	130	134
		Update	Update	Update
2001	7 Dec 2000	6 April	7 June	7 August	Obs.
No. of Hurricanes	5	6	7	7	9
No. of Named Storms	9	10	12	12	15
No. of Hurricane Days	20	25	30	30	27
No. of Named Storm Days	45	50	60	60	62
Hurr. Destruction Potential(HDP)	65	65	75	75	71
Major Hurricanes (Cat. 3-4-5)	2	2	3	3	4
Major Hurr. Days	4	4	5	5	5
Net Trop. Cyclone Activity	90	100	120	120	142

Table 2: Alteration of Atlantic basin tropical cyclone climatology when the base period is changed from 1950-1990 to 1950-2000.

	1950-1990	1950-2000	Difference
No. of Hurricanes	5.8	5.9	0.1
No. of Named Storms	9.3	9.6	0.3
No. of Hurricane Days	23.7	24.5	0.8
No. of Named Storm Days	46.9	49.1	2.2
Hurr. Destruction Potential(HDP)	71.7	72.7	11.0
Major Hurricanes (Cat. 3-4-5)	2.2	2.3	0.1
Major Hurr. Days	4.7	5.0	0.3
Net Trop. Cyclone Activity	100	100	0