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Month/Day Hour: Minute	Observed tide level (TPm)	Astronomical tide level (TPm)	Tide level deviation (m)
10/18 14:20	－	0.51	－
10/18 14:10	－	0.46	－
10/18 14:00	－	0.40	－
10/18 13:50	－	0.34	－
10/18 13:40	－	0.28	－
10/18 13:30	－	0.22	－
10/18 13:20	－	0.16	－
10/18 13:10	－	0.10	－
10/18 13:00	－	0.03	－
10/18 12:50	0.11↑	- 0.03	0.14
12:40	0.05↑	- 0.09	0.14
12:30	- 0.01↑	- 0.15	0.14
12:20	- 0.08↑	- 0.21	0.13
12:10	- 0.14↑	- 0.27	0.13
12:00	- 0.20↑	- 0.32	0.12
11:50	- 0.27↑	- 0.37	0.10
11:40	- 0.29↑	- 0.42	0.13
11:30	- 0.33↑	- 0.46	0.13
11:20	- 0.37↑	- 0.50	0.13
11:10	- 0.40↑	- 0.54	0.14
11:00	- 0.43↑	- 0.57	0.14
10:50	- 0.46↑	- 0.60	0.14
10:40	- 0.48↑	- 0.62	0.14
10:30	- 0.51↑	- 0.63	0.12
10:20	- 0.52→	- 0.65	0.13
10:10	- 0.52→	- 0.65	0.13
10:00	- 0.52↓	- 0.66	0.14
09:50	- 0.51→	- 0.65	0.14
09:40	- 0.51↓	- 0.65	0.14
09:30	- 0.50↓	- 0.63	0.13
09:20	- 0.49↓	- 0.62	0.13
09:10	- 0.45↓	- 0.59	0.14
09:00	- 0.43↓	- 0.57	0.14
08:50	- 0.40↓	- 0.54	0.14
08:40	- 0.36↓	- 0.50	0.14
08:30	- 0.32	- 0.47	0.15

*Information on reaching the storm surge emergency warning water level: 　 Alert Level 5 equivalent information
(Information for determining the declaring of Alert Level 5 emergencies by municipalities to ensure safety)
*TPm: Average sea level of Tokyo Bay, the reference plane for elevation (altitude above sea level)
*Tide level deviation: The difference between the observed tide level and the expected astronomical tide level.
*Astronomical tide level: The tide level that rises or falls due to the influence of celestial bodies (movements of the moon, sun, or earth).