| 21 | 1500 SAT MAY 19 | Post-Tropical Cyclone Aletta | 14.8N | 112.5W | ENE | 5 (4) | 1006 (29.71) | 30 (26) |
| 20 | 0900 SAT MAY 19 | Tropical Depression Aletta | 14.6N | 112.8W | E | 2 (2) | 1006 (29.71) | 30 (26) |
| 19 | 0300 SAT MAY 19 | Tropical Depression Aletta | 14.5N | 113.2W | NE | 3 (3) | 1006 (29.71) | 30 (26) |
| 18 | 2100 FRI MAY 18 | Tropical Depression Aletta | 14.4N | 113.5W | NE | 3 (3) | 1006 (29.71) | 35 (30) |
| 17 | 1500 FRI MAY 18 | Tropical Depression Aletta | 14.2N | 113.6W | NE | 6 (5) | 1006 (29.71) | 35 (30) |
| 16 | 0900 FRI MAY 18 | Tropical Depression Aletta | 13.8N | 113.8W | NE | 3 (3) | 1005 (29.68) | 35 (30) |
| 15 | 0300 FRI MAY 18 | Tropical Depression Aletta | 13.6N | 114.3W | NNE | 6 (5) | 1006 (29.71) | 35 (30) |
| 14 | 2100 THU MAY 17 | Tropical Depression Aletta | 13.1N | 114.7W | N | 6 (5) | 1006 (29.71) | 35 (30) |
| 13 | 1500 THU MAY 17 | Tropical Depression Aletta | 12.1N | 114.8W | NW | 5 (4) | 1006 (29.71) | 35 (30) |
| 12 | 0900 THU MAY 17 | Tropical Depression Aletta | 11.7N | 114.6W | WNW | 3 (3) | 1005 (29.68) | 35 (30) |
| 11 | 0300 THU MAY 17 | Tropical Storm Aletta | 11.5N | 114.3W | W | 9 (8) | 1004 (29.65) | 40 (35) |
| 10 | 2100 WED MAY 16 | Tropical Storm Aletta | 11.4N | 113.5W | W | 9 (8) | 1004 (29.65) | 40 (35) |
| 9 | 1500 WED MAY 16 | Tropical Storm Aletta | 11.8N | 112.6W | W | 9 (8) | 1004 (29.65) | 40 (35) |
| 8 | 0900 WED MAY 16 | Tropical Storm Aletta | 11.9N | 111.7W | WNW | 9 (8) | 1004 (29.65) | 40 (35) |
| 7 | 0300 WED MAY 16 | Tropical Storm Aletta | 11.7N | 110.9W | WNW | 10 (9) | 1003 (29.62) | 45 (39) |
| 6 | 2100 TUE MAY 15 | Tropical Storm Aletta | 11.2N | 110.4W | W | 10 (9) | 1003 (29.62) | 45 (39) |
| 5 | 1500 TUE MAY 15 | Tropical Storm Aletta | 10.6N | 109.6W | W | 9 (8) | 1004 (29.65) | 40 (35) |
| 4 | 0900 TUE MAY 15 | Tropical Storm Aletta | 10.8N | 108.7W | WNW | 9 (8) | 1004 (29.65) | 40 (35) |
| 3 | 0300 TUE MAY 15 | Tropical Storm Aletta | 10.5N | 108.5W | W | 12 (10) | 1004 (29.65) | 40 (35) |
| 2 | 2100 MON MAY 14 | Tropical Depression One-E | 10N | 107.3W | W | 8 (7) | 1006 (29.71) | 35 (30) |
| 1 | 1500 MON MAY 14 | Tropical Depression One-E | 9.8N | 105.9W | W | 5 (4) | 1006 (29.71) | 35 (30) |