COL Map Ver 3.0

2025-07-0200-000046

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	53.5	82.5	13.12	600	7.67	-1.96	0.58	1
18Z 06 Jul	52.5	84.5	13.48	800	9.41	-1.94	0.7	1
00Z 07 Jul	52.0	85.5	12.52	600	8.18	-1.93	0.65	1
06Z 07 Jul	52.0	87.0	9.83	500	7.35	-1.7	0.75	1
12Z 07 Jul	51.0	88.5	9.87	700	10.48	-1.37	1.06	1
18Z 07 Jul	44.0	97.5	9.57	1900	11.1	-1.44	1.16	1
00Z 08 Jul	51.0	90.5	10.64	1000	9.8	-1.16	0.92	1
06Z 08 Jul	49.5	91.0	10.47	1300	12.85	-1.14	1.23	1
12Z 08 Jul	49.0	93.0	9.83	1300	14.04	-1.05	1.43	1
18Z 08 Jul	49.5	93.5	9.79	1200	15.11	-1.0	1.54	1
00Z 09 Jul	47.5	95.5	9.66	1000	17.29	-1.04	1.79	0
06Z 09 Jul	48.5	96.0	9.43	900	18.19	-0.95	1.93	0
12Z 09 Jul	48.5	99.5	8.71	900	20.13	-0.85	2.31	0
18Z 09 Jul	48.5	96.5	8.84	1000	19.16	-1.04	2.17	1
00Z 10 Jul	47.0	101.0	8.0	1000	19.78	-1.05	2.47	0
06Z 10 Jul	48.0	102.5	7.85	1000	19.8	-1.03	2.52	0
12Z 10 Jul	49.0	102.0	7.4	900	20.28	-1.14	2.74	0
18Z 10 Jul	49.5	105.0	7.98	900	20.95	-1.18	2.62	0
00Z 11 Jul	51.0	105.0	7.57	1000	19.73	-1.14	2.61	0
06Z 11 Jul	51.0	106.0	7.57	900	20.76	-1.28	2.74	0
12Z 11 Jul	50.5	108.0	9.39	900	21.45	-1.4	2.28	0
18Z 11 Jul	49.5	110.5	11.63	800	22.59	-1.59	1.94	0
00Z 12 Jul	48.5	114.0	12.65	700	23.21	-1.67	1.83	0
06Z 12 Jul	47.5	116.0	13.7	700	24.17	-1.84	1.76	0
12Z 12 Jul	46.0	118.5	15.21	600	25.76	-1.91	1.69	0
18Z 12 Jul	46.0	121.0	15.72	700	23.35	-1.95	1.49	0
00Z 13 Jul	43.0	122.0	17.07	600	24.24	-1.9	1.42	0
06Z 13 Jul	41.5	123.0	17.35	500	23.62	-1.87	1.36	0
12Z 13 Jul	39.5	124.0	17.17	400	21.22	-1.83	1.24	0
18Z 13 Jul	37.0	124.5	16.38	400	16.23	-1.8	0.99	0
00Z 14 Jul	35.0	125.5	18.17	400	11.95	-1.73	0.66	1
06Z 14 Jul	34.5	126.0	27.54	400	7.16	-2.37	0.26	1
12Z 14 Jul	33.5	128.0	30.64	500	6.12	-0.93	0.2	1
18Z 14 Jul	34.0	130.0	27.47	500	8.84	-0.33	0.32	1
00Z 15 Jul	35.5	130.5	25.53	400	9.1	0.29	0.36	1
06Z 15 Jul	36.5	130.5	28.1	400	7.4	-0.52	0.26	1
12Z 15 Jul	37.5	131.0	25.63	500	9.79	-0.87	0.38	1
18Z 15 Jul	38.0	133.0	22.0	400	19.77	-0.82	0.9	1
00Z 16 Jul	40.5	134.5	19.93	400	20.83	-0.62	1.05	1
06Z 16 Jul	43.0	136.5	19.98	300	23.35	-0.71	1.17	0
12Z 16 Jul	46.0	139.5	17.75	300	21.87	-0.96	1.23	0
18Z 16 Jul	48.0	145.0	15.28	300	23.61	-1.19	1.54	0
00Z 17 Jul	48.5	150.0	13.31	300	29.16	-1.79	2.19	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.