Storm Activity: Aug 9, 1978 - Aug 13, 1978
Aug 13 · 03:00 GMT -- 996 mb Tropical Depression
| Aug 13 | 03:00 GMT | 18.16 | 99.75 | -- | 996 mb | Tropical Depression | -- |
| Aug 13 | 00:00 GMT | 18 | 100.5 | -- | 996 mb | Tropical Depression | -- |
| Aug 12 | 21:00 GMT | 17.95 | 101.24 | -- | 996 mb | Tropical Depression | -- |
| Aug 12 | 18:00 GMT | 18 | 102 | -- | 996 mb | Tropical Depression | -- |
| Aug 12 | 15:00 GMT | 18.1 | 102.77 | -- | 994 mb | Tropical Depression | -- |
| Aug 12 | 12:00 GMT | 18.2 | 103.5 | -- | 992 mb | Tropical Depression | -- |
| Aug 12 | 09:00 GMT | 18.21 | 104.17 | -- | 991 mb | Tropical Depression | -- |
| Aug 12 | 06:00 GMT | 18.2 | 104.8 | -- | 990 mb | Tropical Depression | -- |
| Aug 12 | 03:00 GMT | 18.2 | 105.43 | -- | 987 mb | Tropical Storm | -- |
| Aug 12 | 00:00 GMT | 18.2 | 106 | 40 mph | 985 mb | Tropical Storm | -- |
| Aug 11 | 21:00 GMT | 18.19 | 106.47 | 45 mph | 985 mb | Tropical Storm | -- |
| Aug 11 | 18:00 GMT | 18.2 | 106.9 | 45 mph | 985 mb | Tropical Storm | -- |
| Aug 11 | 15:00 GMT | 18.25 | 107.34 | 45 mph | 987 mb | Tropical Storm | -- |
| Aug 11 | 12:00 GMT | 18.3 | 107.8 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 11 | 09:00 GMT | 18.3 | 108.31 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 11 | 06:00 GMT | 18.3 | 108.8 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 11 | 03:00 GMT | 18.35 | 109.19 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 11 | 00:00 GMT | 18.4 | 109.6 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 10 | 21:00 GMT | 18.41 | 110.17 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 10 | 18:00 GMT | 18.4 | 110.8 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 10 | 15:00 GMT | 18.4 | 111.4 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 10 | 12:00 GMT | 18.4 | 112 | 45 mph | 990 mb | Tropical Storm | -- |
| Aug 10 | 09:00 GMT | 18.39 | 112.63 | -- | 990 mb | Tropical Depression | -- |
| Aug 10 | 06:00 GMT | 18.4 | 113.2 | -- | 990 mb | Tropical Depression | -- |
| Aug 10 | 03:00 GMT | 18.45 | 113.67 | -- | 992 mb | Tropical Depression | -- |
| Aug 10 | 00:00 GMT | 18.5 | 114 | -- | 994 mb | Tropical Depression | -- |
| Aug 9 | 21:00 GMT | 18.51 | 114.19 | -- | 994 mb | Tropical Depression | -- |
| Aug 9 | 18:00 GMT | 18.5 | 114.3 | -- | 994 mb | Tropical Depression | -- |
| Aug 9 | 15:00 GMT | 18.46 | 114.47 | -- | 994 mb | Tropical Depression | -- |
| Aug 9 | 12:00 GMT | 18.5 | 114.6 | -- | 994 mb | Tropical Depression | -- |
| Aug 9 | 09:00 GMT | 18.67 | 114.73 | -- | 995 mb | Tropical Depression | -- |
| Aug 9 | 06:00 GMT | 19 | 114.7 | -- | 996 mb | Tropical Depression | -- |
| Aug 9 | 03:00 GMT | 19.46 | 114.43 | -- | 997 mb | Tropical Depression | -- |
| Aug 9 | 00:00 GMT | 20 | 114 | -- | 998 mb | Tropical Depression | -- |
Learn more about Tropical Storm Bess–Bonnie and the 1978 Western Pacific hurricane season in our hurricane archive.
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