TROPICAL CYCLONES IN 2011
SIX-HOURLY POSITION AND INTENSITY DATA OF SEVERE TROPICAL STORM MERBOK (1110)
| Month | Date | Time (UTC) |
Intensity | Estimated minimum central pressure (hPa) |
Estimated maximum surface winds (m/s) |
Lat. °N |
Long. °E |
| AUG | 3 | 0000 | T.D. | 1004 | 13 | 23.2 | 161.8 |
| 0600 | T.S. | 1000 | 18 | 23.2 | 160.8 | ||
| 1200 | T.S. | 1000 | 18 | 23.3 | 159.8 | ||
| 1800 | T.S. | 1000 | 18 | 23.5 | 159.1 | ||
| 4 | 0000 | T.S. | 1000 | 18 | 24.1 | 158.3 | |
| 0600 | T.S. | 998 | 18 | 24.7 | 157.2 | ||
| 1200 | T.S. | 998 | 18 | 24.9 | 156.8 | ||
| 1800 | T.S. | 998 | 18 | 25.3 | 156.3 | ||
| 5 | 0000 | T.S. | 994 | 21 | 26.2 | 155.6 | |
| 0600 | T.S. | 990 | 23 | 26.9 | 155.3 | ||
| 1200 | T.S. | 990 | 23 | 27.2 | 154.8 | ||
| 1800 | T.S. | 990 | 23 | 27.5 | 154.4 | ||
| 6 | 0000 | S.T.S. | 985 | 25 | 28.1 | 154.0 | |
| 0600 | S.T.S. | 985 | 25 | 28.7 | 153.8 | ||
| 1200 | S.T.S. | 985 | 25 | 29.3 | 153.7 | ||
| 1800 | S.T.S. | 985 | 25 | 30.1 | 153.7 | ||
| 7 | 0000 | S.T.S. | 985 | 25 | 30.8 | 153.9 | |
| 0600 | S.T.S. | 985 | 25 | 31.6 | 154.1 | ||
| 1200 | S.T.S. | 985 | 25 | 32.4 | 154.8 | ||
| 1800 | S.T.S. | 985 | 25 | 33.1 | 155.5 | ||
| 8 | 0000 | S.T.S. | 980 | 25 | 34.2 | 156.2 | |
| 0600 | S.T.S. | 980 | 25 | 35.7 | 157.7 | ||
| 1200 | S.T.S. | 980 | 25 | 37.3 | 159.1 | ||
| 1800 | S.T.S. | 980 | 25 | 39.1 | 160.2 | ||
| 9 | 0000 | S.T.S. | 980 | 25 | 40.4 | 160.6 | |
| 0600 | T.S. | 985 | 23 | 41.3 | 161.2 | ||
| 1200 | T.S. | 985 | 23 | 41.9 | 162.7 | ||
| Became Extratropical | |||||||