Alert | N° | Date (UTC) | Max Rainfall (mm) | Pop >100mm or higher | 50-100 | 100-250 | 250-500 | 500-750 | 750-1000 | >1000 | Countries |
| 1 | 29 May 2021 00:00 | 201 | - | | - | - | - | - | - | China, Philippines, Malaysia |
| 2 | 29 May 2021 12:00 | 416 | 50 thousand | | | - | - | - | - | Japan, Philippines |
| 3 | 30 May 2021 00:00 | 634 | - | | - | - | - | - | - | China, Taiwan, Philippines, Palau |
| 4 | 30 May 2021 12:00 | 508 | - | | - | - | - | - | - | South Korea, China, Taiwan, Philippines |
| 5 | 31 May 2021 00:00 | 335 | 580 thousand | | | - | - | - | - | China, Taiwan, Philippines |
| 6 | 31 May 2021 12:00 | 505 | 50 thousand | | | - | - | - | - | Japan, China, Philippines, Micronesia |
| 7 | 01 Jun 2021 00:00 | 519 | 1.2 million | | | | | - | - | China, Taiwan, Philippines |
| 8 | 01 Jun 2021 12:00 | 601 | 3.9 million | | | | | - | - | China, Philippines |
| 9 | 02 Jun 2021 00:00 | 605 | 790 thousand | | | | - | - | - | China, Taiwan, Philippines |
| 10 | 02 Jun 2021 12:00 | 449 | 33.8 million | | | - | - | - | - | Japan, China, Taiwan, Hong Kong, Philippines, Malaysia |