COL Map Ver 3.0

2026-02-0200-000151

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 08 Feb	56.0	39.5	7.87	2200	21.62	-1.75	2.75	0
18Z 08 Feb	55.5	39.5	9.14	2500	21.04	-1.68	2.3	0
00Z 09 Feb	56.5	44.5	10.54	2600	19.18	-1.75	1.82	0
06Z 09 Feb	55.5	45.0	11.38	2600	19.9	-1.66	1.75	0
12Z 09 Feb	55.5	48.0	11.88	2600	19.84	-1.66	1.67	0
18Z 09 Feb	55.5	50.5	12.9	2600	20.72	-1.64	1.61	0
00Z 10 Feb	55.0	50.5	13.2	2600	21.63	-1.63	1.64	0
06Z 10 Feb	56.0	50.0	14.12	2600	20.34	-1.62	1.44	1
12Z 10 Feb	58.5	48.5	14.68	2600	15.99	-1.65	1.09	1
18Z 10 Feb	67.0	52.0	17.34	2200	5.05	-2.45	0.29	1
00Z 11 Feb	67.0	52.5	17.61	2300	4.57	-2.02	0.26	1
06Z 11 Feb	69.0	51.0	18.63	2300	3.46	-2.01	0.19	1
12Z 11 Feb	69.5	52.0	19.11	2100	2.92	-1.55	0.15	1
18Z 11 Feb	70.5	52.5	19.45	2000	2.72	-1.07	0.14	1
00Z 12 Feb	70.5	51.0	18.79	2000	3.57	-1.07	0.19	1
06Z 12 Feb	71.5	47.0	18.82	1900	2.59	-1.18	0.14	1
12Z 12 Feb	72.5	45.5	18.33	1900	2.7	-1.11	0.15	1
18Z 12 Feb	73.5	40.5	17.64	1900	2.43	-1.29	0.14	1
00Z 13 Feb	75.0	31.0	16.73	1900	1.1	-2.43	0.07	1
06Z 13 Feb	74.5	32.0	15.8	2100	3.35	-1.88	0.21	1
12Z 13 Feb	70.0	69.0	15.08	1400	8.92	-0.96	0.59	1
18Z 13 Feb	70.0	69.5	16.01	1400	9.35	-1.16	0.58	1
00Z 14 Feb	70.5	71.0	16.47	1300	8.96	-1.23	0.54	1
06Z 14 Feb	70.5	73.0	16.67	1300	9.83	-1.39	0.59	1
12Z 14 Feb	70.5	74.0	15.89	1300	10.57	-1.57	0.67	1
18Z 14 Feb	68.0	88.5	15.17	1400	12.35	-1.8	0.81	1
00Z 15 Feb	66.5	98.0	15.38	1400	12.98	-2.01	0.84	1
06Z 15 Feb	64.5	105.5	16.14	1500	14.35	-2.13	0.89	1
12Z 15 Feb	61.0	118.5	18.18	2600	14.25	-1.99	0.78	1
18Z 15 Feb	60.5	121.5	19.96	2600	14.1	-1.94	0.71	1
00Z 16 Feb	59.0	123.5	21.42	2600	15.43	-1.89	0.72	1
06Z 16 Feb	57.5	127.5	22.11	2600	17.03	-1.81	0.77	1
12Z 16 Feb	56.0	128.5	22.76	2600	19.76	-1.79	0.87	1
18Z 16 Feb	55.5	132.0	23.27	2600	19.98	-1.72	0.86	1
00Z 17 Feb	54.5	133.0	23.47	2600	21.8	-1.64	0.93	1
06Z 17 Feb	55.0	135.0	23.09	2600	20.9	-1.6	0.91	1
12Z 17 Feb	54.5	136.5	22.63	2600	21.87	-1.62	0.97	1
18Z 17 Feb	53.0	136.5	21.95	2600	23.77	-1.68	1.08	1
00Z 18 Feb	51.0	136.5	21.23	2400	26.15	-1.71	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.