COL Map Ver 3.0

2025-11-0500-000123

The daily central positions of lows are plotted with reference to the time shown at the top of the image. For a description of each column in the table, please refer to the bottom of this page.

timestamp	lat	lon	So	ro	Sb	ang	SR	ex
00Z 24 Oct	70.0	5.0	18.2	400	18.96	-1.65	1.04	1
06Z 24 Oct	69.5	10.5	19.0	300	22.71	-1.46	1.2	0
12Z 24 Oct	70.0	19.0	19.82	200	28.16	-1.16	1.42	1
18Z 24 Oct	71.0	27.0	26.98	200	25.05	-1.14	0.93	1
00Z 25 Oct	71.5	34.0	32.88	200	27.89	-1.07	0.85	1
06Z 25 Oct	72.0	39.5	33.57	300	20.02	-1.11	0.6	1
12Z 25 Oct	71.5	46.0	37.88	300	24.45	-1.24	0.65	1
18Z 25 Oct	71.5	52.0	37.81	400	14.21	-1.29	0.38	1
00Z 26 Oct	71.5	57.0	34.23	400	4.7	-1.62	0.14	1
06Z 26 Oct	70.5	60.5	31.84	400	8.26	-2.43	0.26	1
12Z 26 Oct	69.0	64.0	29.2	600	18.96	-2.49	0.65	1
18Z 26 Oct	67.0	68.0	27.6	500	28.26	-2.6	1.02	1
00Z 27 Oct	64.5	72.5	26.14	500	34.49	-2.47	1.32	0
06Z 27 Oct	61.5	78.5	22.9	400	43.71	-2.34	1.91	0
12Z 27 Oct	59.0	89.0	21.16	500	34.32	-1.82	1.62	0
18Z 27 Oct	60.0	96.0	19.2	800	21.82	-1.78	1.14	1
00Z 28 Oct	60.0	101.0	18.35	900	17.45	-1.73	0.95	1
06Z 28 Oct	60.0	105.0	15.66	1000	14.74	-1.78	0.94	1
12Z 28 Oct	61.0	105.0	12.86	1000	13.67	-1.91	1.06	1
18Z 28 Oct	59.0	104.5	10.8	1200	16.36	-1.98	1.51	1
00Z 29 Oct	65.0	98.0	11.04	1400	11.8	-2.0	1.07	1
06Z 29 Oct	64.0	102.5	11.74	1300	11.88	-1.96	1.01	1
12Z 29 Oct	66.0	105.5	11.94	1100	9.11	-1.83	0.76	1
18Z 29 Oct	65.0	107.0	11.51	1100	11.18	-1.87	0.97	0
00Z 30 Oct	63.5	109.0	10.28	1200	13.82	-1.91	1.34	0
06Z 30 Oct	64.5	108.0	9.35	900	13.72	-2.0	1.47	0
12Z 30 Oct	63.0	110.5	9.41	900	14.5	-2.05	1.54	1
18Z 30 Oct	61.5	113.0	9.66	900	14.78	-2.11	1.53	1
00Z 31 Oct	61.0	116.0	9.32	1500	16.09	-2.04	1.73	1
06Z 31 Oct	55.5	113.5	9.05	1000	22.37	-2.37	2.47	0
12Z 31 Oct	52.5	115.0	9.63	1000	22.45	-2.33	2.33	0
18Z 31 Oct	50.5	118.5	11.24	1100	19.5	-2.22	1.74	0
00Z 01 Nov	48.5	120.5	12.78	1000	19.47	-2.18	1.52	0
06Z 01 Nov	47.0	123.0	13.54	1100	18.64	-2.13	1.38	0
12Z 01 Nov	46.0	125.0	13.89	1000	19.77	-2.18	1.42	0
18Z 01 Nov	44.5	127.0	15.15	900	21.37	-2.15	1.41	1
00Z 02 Nov	43.0	129.5	17.59	800	22.91	-2.01	1.3	1
06Z 02 Nov	41.5	132.0	19.16	700	23.38	-1.89	1.22	1
12Z 02 Nov	40.5	135.0	21.42	600	23.86	-1.75	1.11	1
18Z 02 Nov	40.0	138.5	22.15	500	23.88	-1.66	1.08	1
00Z 03 Nov	40.0	143.5	21.35	600	26.35	-1.45	1.23	0

Columns

Name	Unit	Displayed	Description
timestamp		✓	datetime
detected_id			Vortex ID that matches the detection rule.
ID			Vortex ID at the corresponding time. If a split occurs, the detected_id may not match the detected_id.
lat	deg	✓	Latitude
lon	deg	✓	Longitude
val	m		Geopotential height at the center of the vortex
So	m (100 km)^-1	✓	Optimal slope
ro	km	✓	Optimal radius
Do	m		Optimal depth
Sb	m (100 km)^-1	✓	Intensity of background slope (S_BG)
ang	rad	✓	Direction of S_BG
m	m (100 km)^-1		Eastward component of S_BG
n	m (100 km)^-1		Northward component of S_BG
SR		✓	Ratio of intensity of background slope (S_BG) to optimal slope (S_o) (S_BG/S_o)
ex		✓	COL flag 0: trough 1: COL
Merge			Merge Log 0: None -1: Vortex dissipated -2: Merged from another -3: Present at the end of analysis Vortex ID: Merged into the corresponding vortex and dissipated
Split			Split Log 0: None -1: Vortex generated -2: Split into another -3: Present at the start of analysis Vortex ID: Formed by splitting from the corresponding vortex
generation			Generation Number Set to 1 at the initial analysis time (FT = 0) and incremented when a different vortex ID is encountered as time is traced backward.