COL Map Ver 3.0

2025-07-0200-000248

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
12Z 06 Jul	51.5	133.5	19.15	700	31.44	-1.28	1.64	0
18Z 06 Jul	52.5	139.0	23.24	700	24.56	-1.1	1.06	1
00Z 07 Jul	52.5	140.5	25.45	700	22.73	-1.24	0.89	1
06Z 07 Jul	53.0	141.0	24.28	800	19.11	-1.36	0.79	1
12Z 07 Jul	53.0	142.0	23.05	800	17.31	-1.58	0.75	1
18Z 07 Jul	52.0	143.5	23.05	900	20.41	-1.76	0.89	1
00Z 08 Jul	52.0	144.5	21.61	900	20.59	-1.98	0.95	1
06Z 08 Jul	51.5	144.5	22.17	800	25.29	-2.14	1.14	1
12Z 08 Jul	50.5	148.5	22.54	800	26.49	-2.06	1.18	1
18Z 08 Jul	50.0	152.0	21.05	900	22.65	-2.0	1.08	1
00Z 09 Jul	49.5	155.5	19.11	900	19.99	-1.83	1.05	1
06Z 09 Jul	49.0	157.0	18.88	900	18.36	-1.76	0.97	1
12Z 09 Jul	49.5	148.0	14.16	1000	20.83	-2.39	1.47	0
18Z 09 Jul	48.0	145.0	14.95	900	22.8	-2.47	1.52	0
00Z 10 Jul	47.0	145.5	16.42	800	21.02	-2.46	1.28	0
06Z 10 Jul	45.5	145.5	17.2	800	18.66	-2.42	1.09	0
12Z 10 Jul	45.0	145.5	18.62	900	16.88	-2.61	0.91	1
18Z 10 Jul	43.0	144.0	20.2	800	14.33	-2.63	0.71	1
00Z 11 Jul	42.0	144.0	24.4	800	10.9	-2.54	0.45	1
06Z 11 Jul	41.5	144.5	25.82	700	8.37	-2.59	0.32	1
12Z 11 Jul	40.5	145.0	26.55	700	6.57	-2.35	0.25	1
18Z 11 Jul	36.5	139.0	18.25	500	18.86	-2.47	1.03	0
00Z 12 Jul	34.5	139.0	18.91	400	17.91	-2.04	0.95	0
06Z 12 Jul	33.5	140.0	19.61	300	17.81	-1.7	0.91	0
12Z 12 Jul	32.5	141.0	18.51	200	16.1	-1.62	0.87	1
18Z 12 Jul	32.0	141.5	19.44	200	8.13	-1.28	0.42	1
00Z 13 Jul	31.5	141.0	22.11	200	5.05	-0.82	0.23	1
06Z 13 Jul	30.5	140.5	25.07	200	3.73	-1.06	0.15	1
12Z 13 Jul	30.0	141.0	30.44	200	7.7	-1.29	0.25	1
18Z 13 Jul	30.5	142.0	31.9	200	6.95	-0.2	0.22	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.