COL Map Ver 3.0

2025-07-0500-000421

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	53.0	79.0	15.99	500	6.55	-2.29	0.41	1
18Z 06 Jul	53.0	80.5	14.26	600	4.32	-1.69	0.3	1
00Z 07 Jul	52.5	82.5	12.87	700	4.09	-1.09	0.32	1
06Z 07 Jul	53.0	83.5	9.49	600	3.19	-0.79	0.34	1
12Z 07 Jul	51.5	88.0	6.48	800	1.59	-1.34	0.24	1
18Z 07 Jul	52.0	91.5	7.1	200	5.39	0.97	0.76	1
00Z 08 Jul	51.5	91.5	7.26	1000	0.36	-0.59	0.05	1
06Z 08 Jul	49.0	93.0	6.98	1300	3.47	-1.23	0.5	1
12Z 08 Jul	50.0	96.0	6.5	1100	3.5	-0.84	0.54	1
18Z 08 Jul	40.5	104.0	5.27	400	7.36	-1.12	1.4	1
00Z 09 Jul	42.0	106.0	6.03	200	9.36	-0.96	1.55	0
06Z 09 Jul	43.5	108.0	7.21	200	10.52	-0.85	1.46	0
12Z 09 Jul	45.5	110.0	6.6	200	11.95	-0.83	1.81	0
18Z 09 Jul	49.0	111.5	7.05	400	11.4	-0.57	1.62	0
00Z 10 Jul	51.0	112.5	8.44	400	11.15	-0.62	1.32	1
06Z 10 Jul	52.5	113.5	10.81	500	9.14	-0.66	0.85	1
12Z 10 Jul	53.5	114.0	12.11	300	5.02	-1.52	0.41	1
18Z 10 Jul	53.0	115.5	13.03	200	12.08	-1.95	0.93	1
00Z 11 Jul	53.5	118.5	10.82	300	11.45	-1.47	1.06	1
06Z 11 Jul	53.5	121.0	8.13	400	11.93	-1.41	1.47	0
12Z 11 Jul	53.0	121.0	8.63	300	6.77	-1.76	0.78	1
18Z 11 Jul	52.5	123.5	6.58	400	10.09	-1.6	1.53	0
00Z 12 Jul	48.0	121.0	7.82	600	11.71	-1.59	1.5	0
06Z 12 Jul	48.5	123.0	7.62	500	11.07	-1.79	1.45	0
12Z 12 Jul	47.5	122.0	7.28	900	9.38	-2.1	1.29	0
18Z 12 Jul	46.5	123.5	7.58	900	8.78	-2.18	1.16	0
00Z 13 Jul	45.5	125.5	7.62	800	7.85	-2.05	1.03	0
06Z 13 Jul	44.0	125.5	7.3	800	6.4	-2.22	0.88	0
12Z 13 Jul	38.0	124.5	7.35	800	5.58	-2.23	0.76	1
18Z 13 Jul	37.0	126.0	8.55	800	5.5	-2.0	0.64	1
00Z 14 Jul	37.0	127.5	11.29	700	5.4	-1.75	0.48	1
06Z 14 Jul	35.5	128.0	15.48	400	4.74	-2.02	0.31	1
12Z 14 Jul	35.0	128.5	18.86	400	4.2	-1.79	0.22	1
18Z 14 Jul	35.0	129.0	19.54	400	3.21	-1.3	0.16	1
00Z 15 Jul	36.0	129.5	20.47	400	2.43	0.26	0.12	1
06Z 15 Jul	36.5	130.0	19.86	400	3.38	-0.13	0.17	1
12Z 15 Jul	37.0	130.5	16.64	500	6.27	-0.83	0.38	1
18Z 15 Jul	38.0	132.0	13.46	400	11.08	-0.76	0.82	1
00Z 16 Jul	40.0	133.5	10.27	500	14.65	-0.59	1.43	0
06Z 16 Jul	43.0	135.5	7.7	500	15.64	-0.45	2.03	0
12Z 16 Jul	46.0	138.5	5.49	500	14.25	-0.56	2.59	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.