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Month/Day Hour: Minute	Observed tide level (TPm)	Astronomical tide level (TPm)	Tide level deviation (m)
10/21 02:20	－	- 0.06	－
10/21 02:10	－	- 0.14	－
10/21 02:00	－	- 0.22	－
10/21 01:50	－	- 0.29	－
10/21 01:40	－	- 0.36	－
10/21 01:30	－	- 0.43	－
10/21 01:20	－	- 0.50	－
10/21 01:10	－	- 0.56	－
10/21 01:00	－	- 0.62	－
10/21 00:50	- 0.73↑	- 0.67	- 0.06
00:40	- 0.77↑	- 0.72	- 0.05
00:30	- 0.80↑	- 0.76	- 0.04
00:20	- 0.84↑	- 0.80	- 0.04
00:10	- 0.87↑	- 0.83	- 0.04
00:00	- 0.89↑	- 0.85	- 0.04
10/20 23:50	- 0.90↑	- 0.87	- 0.03
23:40	- 0.91↑	- 0.88	- 0.03
23:30	- 0.93↓	- 0.88	- 0.05
23:20	- 0.92→	- 0.88	- 0.04
23:10	- 0.92↓	- 0.87	- 0.05
23:00	- 0.90↓	- 0.86	- 0.04
22:50	- 0.88↓	- 0.84	- 0.04
22:40	- 0.85↓	- 0.81	- 0.04
22:30	- 0.81↓	- 0.78	- 0.03
22:20	- 0.78↓	- 0.74	- 0.04
22:10	- 0.74↓	- 0.70	- 0.04
22:00	- 0.69↓	- 0.65	- 0.04
21:50	- 0.64↓	- 0.59	- 0.05
21:40	- 0.58↓	- 0.54	- 0.04
21:30	- 0.51↓	- 0.47	- 0.04
21:20	- 0.44↓	- 0.41	- 0.03
21:10	- 0.35↓	- 0.34	- 0.01
21:00	- 0.29↓	- 0.27	- 0.02
20:50	- 0.23↓	- 0.20	- 0.03
20:40	- 0.15↓	- 0.12	- 0.03
20:30	- 0.07	- 0.04	- 0.03

*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).