COL Map Ver 3.0

2025-11-0500-000011

Detail of path

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
18Z 31 Oct	36.5	140.0	12.12	300	24.92	-0.78	2.06	0
00Z 01 Nov	39.5	143.0	22.95	400	23.74	-0.81	1.03	1
06Z 01 Nov	42.0	146.5	29.69	400	26.51	-0.8	0.89	1
12Z 01 Nov	45.0	150.0	30.49	500	25.41	-0.71	0.83	1
18Z 01 Nov	47.5	153.5	29.23	600	23.7	-0.8	0.81	1
00Z 02 Nov	49.0	157.5	26.19	700	25.93	-1.04	0.99	1
06Z 02 Nov	50.5	162.5	22.63	800	25.67	-1.17	1.13	1
12Z 02 Nov	52.0	168.0	20.52	500	24.43	-1.32	1.19	1
18Z 02 Nov	52.0	171.5	20.58	500	25.4	-1.52	1.23	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.