Alert | N° | Date (UTC) | Max Rainfall (mm) | Pop >100mm or higher | 50-100 | 100-250 | 250-500 | 500-750 | 750-1000 | >1000 | Countries |
| 1 | 26 Aug 2021 00:00 | 329 | 220 thousand | | | | - | - | - | United States, Jamaica, Mexico, Guatemala, Colombia |
| 2 | 26 Aug 2021 12:00 | 163 | 3 thousand | | | - | - | - | - | Jamaica |
| 3 | 27 Aug 2021 00:00 | 235 | 150 thousand | | | - | - | - | - | Cayman Islands, Jamaica, Mexico, Honduras, Nicaragua |
| 4 | 27 Aug 2021 12:00 | 169 | Few people | | | - | - | - | - | Cuba, Mexico, Colombia |
| 5 | 28 Aug 2021 00:00 | 167 | 10 thousand | | | - | - | - | - | Cuba, Honduras, El Salvador, Nicaragua |
| 6 | 28 Aug 2021 12:00 | 190 | - | | - | - | - | - | - | United States, Mexico |
| 7 | 29 Aug 2021 00:00 | 202 | - | | - | - | - | - | - | United States |
| 8 | 29 Aug 2021 12:00 | 300 | 180 thousand | | | - | - | - | - | United States, Honduras |
| 9 | 30 Aug 2021 00:00 | 325 | 1.3 million | | | | - | - | - | United States |
| 10 | 30 Aug 2021 12:00 | 237 | 490 thousand | | | - | - | - | - | United States, Mexico, Guatemala, Colombia |
| 11 | 31 Aug 2021 00:00 | 303 | 38.9 million | | | | - | - | - | United States, Mexico, Guatemala, Honduras, El Salvador, Nicaragua, Colombia, Costa Rica |