Interagency Strategic Research Plan for Tropical Cyclones: The Way Ahead

Appendix F Track Guidance Model Errors for 2005

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Appendix F
Track Guidance Model Errors for 2005

The number of cases (“# Cases” at bottom of each table) indicates the number of JTWC forecasts represented in the error computation.

Table F-1. Homogeneous Comparison of Selected Subset of Atlantic Basin Early Track Guidance Model Errors (n mi) for 2005

Model ID	Forecast Period (h)
	12	24	36	48	72	96	120
OFCL	31.0	54.2	77.3	100.2	146.1	195.6	248.4
CLP5	46.9	100.3	162.3	211.9	271.4	341.9	457.9
GFSI	35.6	60.2	85.3	116.3	198.3	275.7	359.6
GFDI	33.9	57.7	78.9	103.9	163.3	253.6	337.4
GFNI	37.1	66.1	96.8	129.6	207.9	299.4	405.4
UKMI	38.1	65.9	93.9	118.5	169.5	216.2	263.1
NGPI	34.7	61.6	90.3	118.8	178.0	236.3	324.5
GUNA	29.1	50.1	72.5	96.1	148.0	194.7	249.9
CONU	29.4	50.6	74.0	97.7	150.2	197.3	257.1
FSSE	29.3	49.5	72.1	96.1	156.6	219.8	261.9
AEMI	35.7	60.7	85.9	113.4	181.8	240.6	264.0
# Cases	398	358	319	268	183	110	71

Table F-2. Homogeneous Comparison of Selected Subset of Eastern Pacific Ocean Basin Early Track Guidance Model Errors (n mi) for 2005

Model ID	Forecast Period (h)
	12	24	36	48	72	96	120
OFCL	28.0	48.0	65.9	79.4	103.6	119.0	132.8
CLP5	34.6	71.0	109.8	146.9	215.0	262.4	319.9
GFSI	34.2	60.4	87.4	113.6	176.0	238.2	256.8
GFDI	32.0	57.1	78.4	97.6	153.1	218.0	288.9
GFNI	41.5	74.9	104.5	125.5	161.2	206.4	244.0
UKMI	36.9	63.3	89.8	113.0	173.2	221.6	297.6
NGPI	38.4	71.2	97.9	123.3	174.6	220.6	267.1
GUNA	27.5	45.9	63.6	77.6	108.3	128.1	147.5
CONU	28.7	48.9	67.3	80.6	108.9	131.7	152.1
AEMI	34.0	61.2	88.8	117.8	176.8	236.0	265.8
BAMS	35.6	63.5	94.9	125.7	182.4	235.8	293.4
BAMM	34.4	58.0	82.2	107.5	148.8	181.5	227.7
BAMD	36.9	65.3	94.1	120.8	169.0	225.2	256.0
LBAR	32.6	69.3	116.2	164.4	255.7	337.9	437.1
P91E	34.6	66.6	100.1	136.3	227.5	318.8	456.4
# Cases	172	149	135	119	93	73	53

Table F-3. Heterogeneous Comparison of Selected Subset of Northwest Pacific Ocean Basin Early Track Guidance Model Errors (n mi) against Official (JTWC) Forecast for 2005

Model ID	Forecast Period (h)
	12	24	36	48	72	96	120
JTWC	40	61	81	102	156	231	284
CONW	36	55	73	94	142	207	272
AFWI	45	78	115	156	279	--	--
AVNI	37	61	85	115	191	296	393
COWI	44	78	118	161	255	--	--
EGRI	46	76	108	139	211	252	306
GFNI	44	74	103	130	204	287	381
JGSI	38	61	80	99	141	234	--
JTYI	38	61	84	113	171	--	--
NGPI	43	70	96	119	182	278	360
TCLI	45	78	117	158	246	253	275
WBAI	49	83	117	154	228	--	--
# Cases	543	503	452	403	312	176	119

Table F-4. Heterogeneous Comparison of Selected Subset of North Indian Ocean Early Track Guidance Model Errors (n mi) against Official (JTWC) Forecast for 2005

Model ID	Forecast Period (h)
	12	24	36	48	72	96	120
JTWC	42	62	84	116	118	133	134
CONW	41	65	91	116	123	154	185
AFWI	46	77	107	138	112	--	--
AVNI	44	60	77	94	91	84	69
COWI	40	57	66	83	112	--	--
EGRI	45	70	98	122	229	272	79
GFNI	51	67	88	114	166	279	405
JGSI	34	52	77	113	213	--	--
JTYI	45	76	121	187	317	--	--
NGPI	46	71	93	121	78	95	107
TCLI	57	96	141	179	203	--	--
WBAI	58	113	174	237	197	--	--
# Cases	77	67	56	49	18	10	8

Table F-5. Heterogeneous Comparison of Selected Subset of Southern Hemisphere Early Track Guidance Model Errors (n mi) against Official (JTWC) Forecast for 2005

(Comparison at 96 and 120 h are against CONW.)

Model ID	Forecast Period (h)
	12	24	36	48	72	96	120
JTWC	41	69	91	114	199	--	--
CONW	40	67	94	117	207	248	292
AFWI	58	103	136	176	274	--	--
AVNI	44	75	111	146	223	310	394
EGRI	45	74	95	137	259	325	366
GFNI	51	89	122	147	210	282	373
NGPI	45	80	118	148	242	333	409
TCLI	52	91	134	149	338	--	--
WBAI	55	108	165	211	321	--	--
# Cases	239	213	192	169	41	--	--

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