Alert | N° | Date (UTC) | Max Rainfall (mm) | Pop >100mm or higher | 50-100 | 100-250 | 250-500 | 500-750 | 750-1000 | >1000 | Countries |
| 1 | 13 Aug 2021 00:00 | 154 | 9 thousand | | | - | - | - | - | Cuba, Costa Rica |
| 2 | 13 Aug 2021 12:00 | 172 | 120 thousand | | | - | - | - | - | Cuba, Venezuela |
| 3 | 14 Aug 2021 00:00 | 153 | 200 thousand | | | - | - | - | - | United States, Cuba, El Salvador, Honduras, Nicaragua |
| 4 | 14 Aug 2021 12:00 | 148 | Few people | | | - | - | - | - | United States, Mexico, Cuba, Costa Rica |
| 5 | 15 Aug 2021 00:00 | 81 | - | | - | - | - | - | - | Guatemala, Mexico, Honduras, El Salvador, Colombia |
| 6 | 15 Aug 2021 12:00 | 189 | - | | - | - | - | - | - | Mexico, Puerto Rico, Honduras |
| 7 | 16 Aug 2021 00:00 | 283 | - | | - | - | - | - | - | Mexico, Honduras, El Salvador |
| 8 | 16 Aug 2021 12:00 | 337 | 720 thousand | | | - | - | - | - | United States, Dominican Republic, Haiti, Mexico |
| 9 | 17 Aug 2021 00:00 | 218 | 1 million | | | - | - | - | - | United States, Haiti, Mexico, Dominican Republic, Honduras |
| 10 | 17 Aug 2021 12:00 | 179 | 130 thousand | | | - | - | - | - | United States, Mexico, Jamaica, Haiti, Colombia |
| 11 | 18 Aug 2021 00:00 | 228 | Few people | | | - | - | - | - | United States, Cayman Islands, Jamaica, Colombia, Venezuela |
| 12 | 18 Aug 2021 12:00 | 263 | 60 thousand | | | - | - | - | - | Mexico, Cayman Islands, Costa Rica |
| 13 | 19 Aug 2021 00:00 | 209 | 3 thousand | | | - | - | - | - | Mexico, Guatemala, Honduras, El Salvador |
| 14 | 19 Aug 2021 12:00 | 209 | 80 thousand | | | - | - | - | - | United States, Mexico, Guatemala, Colombia, Costa Rica |
| 15 | 20 Aug 2021 00:00 | 269 | 40 thousand | | | - | - | - | - | Mexico, Colombia |
| 16 | 20 Aug 2021 12:00 | 284 | - | | - | - | - | - | - | Mexico, Honduras |
| 17 | 21 Aug 2021 00:00 | 400 | 3.2 million | | | - | - | - | - | Mexico |
| 18 | 21 Aug 2021 12:00 | 194 | 70 thousand | | | - | - | - | - | Mexico, Guatemala, Costa Rica |
| 19 | 22 Aug 2021 00:00 | 673 | 2.7 million | | | | | - | - | Mexico, Guatemala, Belize, Honduras, Martinique, El Salvador, Saint Lucia, Nicaragua, Saint Vincent and the Grenadines, Colombia, Costa Rica, Venezuela, Trinidad and Tobago |