COL Map Ver 3.0

2025-12-0500-001513

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 23 Dec	65.0	60.0	26.88	400	4.89	-1.18	0.18	1
06Z 23 Dec	65.0	60.0	27.63	400	3.4	0.36	0.12	1
12Z 23 Dec	64.5	58.5	28.72	400	6.57	2.07	0.23	1
18Z 23 Dec	63.5	57.5	29.52	400	9.22	2.3	0.31	1
00Z 24 Dec	62.0	56.5	29.2	600	9.92	2.72	0.34	1
06Z 24 Dec	60.5	56.0	27.3	700	11.25	3.09	0.41	1
12Z 24 Dec	59.0	56.5	27.14	700	11.46	-2.84	0.42	1
18Z 24 Dec	57.5	58.0	27.39	800	12.98	-2.38	0.47	1
00Z 25 Dec	56.5	60.0	28.18	800	13.52	-2.16	0.48	1
06Z 25 Dec	56.0	62.5	29.07	800	14.53	-1.96	0.5	1
12Z 25 Dec	55.5	64.5	28.71	800	15.93	-1.84	0.55	1
18Z 25 Dec	55.0	67.0	28.25	700	17.92	-1.76	0.63	1
00Z 26 Dec	54.5	70.5	28.55	600	22.95	-1.57	0.8	1
06Z 26 Dec	54.5	75.0	29.14	600	28.24	-1.5	0.97	1
12Z 26 Dec	55.5	80.5	28.91	500	30.43	-1.42	1.05	1
18Z 26 Dec	56.5	86.0	26.07	600	27.3	-1.43	1.05	1
00Z 27 Dec	57.0	92.5	20.95	500	26.32	-1.33	1.26	1
06Z 27 Dec	57.5	98.0	17.37	500	20.4	-1.38	1.17	1
12Z 27 Dec	57.0	103.5	17.56	500	18.13	-1.39	1.03	1
18Z 27 Dec	55.5	106.0	15.52	500	18.74	-1.77	1.21	0
00Z 28 Dec	54.0	109.5	19.9	300	18.65	-2.18	0.94	1
06Z 28 Dec	52.0	114.5	21.4	400	18.71	-1.93	0.87	1
12Z 28 Dec	50.5	119.0	23.4	400	17.69	-1.68	0.76	1
18Z 28 Dec	50.0	122.5	26.08	500	15.29	-1.41	0.59	1
00Z 29 Dec	50.0	125.5	26.39	600	11.39	-1.06	0.43	1
06Z 29 Dec	50.5	127.5	26.09	500	7.45	-0.33	0.29	1
12Z 29 Dec	51.0	128.0	25.62	500	4.03	0.42	0.16	1
18Z 29 Dec	50.5	128.5	24.47	900	5.63	-0.75	0.23	1
00Z 30 Dec	49.5	128.5	24.63	1300	10.05	-1.36	0.41	1
06Z 30 Dec	49.0	129.0	25.17	1400	10.38	-1.55	0.41	1
12Z 30 Dec	48.0	130.0	25.63	1400	10.81	-1.69	0.42	1
18Z 30 Dec	47.5	131.5	26.5	1400	10.16	-1.81	0.38	1
00Z 31 Dec	46.5	133.0	27.09	1400	10.34	-1.96	0.38	1
06Z 31 Dec	45.5	135.5	27.61	1400	9.17	-1.87	0.33	1
12Z 31 Dec	45.0	137.5	27.48	1400	8.9	-1.66	0.32	1
18Z 31 Dec	45.5	140.5	27.05	1400	8.61	-1.29	0.32	1
00Z 01 Jan	46.0	142.5	27.32	1200	8.72	-1.49	0.32	1
06Z 01 Jan	46.0	143.5	27.47	900	7.92	-1.79	0.29	1
12Z 01 Jan	46.0	145.0	25.74	1000	9.7	-1.79	0.38	1
18Z 01 Jan	46.5	148.0	25.79	1000	10.52	-1.59	0.41	1
00Z 02 Jan	46.5	148.5	27.42	1100	10.97	-1.48	0.4	1
06Z 02 Jan	47.0	150.0	29.04	800	9.46	-1.34	0.33	1
12Z 02 Jan	48.0	151.0	27.88	800	4.98	-0.99	0.18	1
18Z 02 Jan	48.5	151.5	25.06	900	3.16	-0.84	0.13	1
00Z 03 Jan	44.0	149.5	23.76	1400	16.19	-1.23	0.68	1

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.