Storm Activity: Oct 14, 1977 - Oct 22, 1977
Oct 22 · 06:00 GMT -- 996 mb Extratropical
| Oct 22 | 06:00 GMT | 41.4 | 177 | -- | 996 mb | Extratropical | -- |
| Oct 22 | 03:00 GMT | 40.66 | 175.12 | -- | 998 mb | Extratropical | -- |
| Oct 22 | 00:00 GMT | 40 | 172.9 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 21:00 GMT | 39.47 | 170.1 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 18:00 GMT | 39 | 167 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 15:00 GMT | 38.57 | 163.94 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 12:00 GMT | 38 | 161 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 09:00 GMT | 36.99 | 158.34 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 06:00 GMT | 36 | 156 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 03:00 GMT | 35.49 | 153.94 | -- | 1,000 mb | Extratropical | -- |
| Oct 21 | 00:00 GMT | 35 | 152 | -- | 1,000 mb | Extratropical | -- |
| Oct 20 | 21:00 GMT | 34.07 | 150 | -- | 999 mb | Extratropical | -- |
| Oct 20 | 18:00 GMT | 33 | 148 | -- | 998 mb | Extratropical | -- |
| Oct 20 | 15:00 GMT | 31.9 | 145.88 | -- | 997 mb | Extratropical | -- |
| Oct 20 | 12:00 GMT | 31 | 144 | -- | 996 mb | Extratropical | -- |
| Oct 20 | 09:00 GMT | 30.57 | 142.65 | -- | 993 mb | Severe Tropical Storm | -- |
| Oct 20 | 06:00 GMT | 30.3 | 141.6 | 60 mph | 990 mb | Severe Tropical Storm | -- |
| Oct 20 | 03:00 GMT | 29.78 | 140.55 | 60 mph | 990 mb | Severe Tropical Storm | -- |
| Oct 20 | 00:00 GMT | 29.3 | 139.7 | 60 mph | 990 mb | Severe Tropical Storm | -- |
| Oct 19 | 21:00 GMT | 29.05 | 139.11 | 60 mph | 987 mb | Severe Tropical Storm | -- |
| Oct 19 | 18:00 GMT | 28.8 | 138.6 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 19 | 15:00 GMT | 28.34 | 137.95 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 19 | 12:00 GMT | 27.8 | 137.3 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 19 | 09:00 GMT | 27.34 | 136.76 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 19 | 06:00 GMT | 26.8 | 136.2 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 19 | 03:00 GMT | 26.06 | 135.5 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 19 | 00:00 GMT | 25.2 | 134.8 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 18 | 21:00 GMT | 24.3 | 134.18 | 60 mph | 982 mb | Severe Tropical Storm | -- |
| Oct 18 | 18:00 GMT | 23.4 | 133.7 | 60 mph | 980 mb | Severe Tropical Storm | -- |
| Oct 18 | 15:00 GMT | 22.56 | 133.41 | 60 mph | 980 mb | Severe Tropical Storm | -- |
| Oct 18 | 12:00 GMT | 21.8 | 133.2 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Oct 18 | 09:00 GMT | 21.14 | 132.86 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Oct 18 | 06:00 GMT | 20.5 | 132.6 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Oct 18 | 03:00 GMT | 19.73 | 132.58 | 60 mph | 982 mb | Severe Tropical Storm | -- |
| Oct 18 | 00:00 GMT | 19 | 132.6 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Oct 17 | 21:00 GMT | 18.43 | 132.52 | 55 mph | 985 mb | Tropical Storm | -- |
| Oct 17 | 18:00 GMT | 18 | 132.3 | 50 mph | 985 mb | Tropical Storm | -- |
| Oct 17 | 15:00 GMT | 17.59 | 131.78 | 50 mph | 985 mb | Tropical Storm | -- |
| Oct 17 | 12:00 GMT | 17.4 | 131.4 | 50 mph | 985 mb | Tropical Storm | -- |
| Oct 17 | 09:00 GMT | 17.67 | 131.65 | 50 mph | 985 mb | Tropical Storm | -- |
| Oct 17 | 06:00 GMT | 17.9 | 132.1 | 50 mph | 985 mb | Tropical Storm | -- |
| Oct 17 | 03:00 GMT | 17.54 | 132.3 | 45 mph | 987 mb | Tropical Storm | -- |
| Oct 17 | 00:00 GMT | 17 | 132.5 | 40 mph | 990 mb | Tropical Storm | -- |
| Oct 16 | 21:00 GMT | 16.62 | 132.8 | -- | 994 mb | Tropical Depression | -- |
| Oct 16 | 18:00 GMT | 16.3 | 133.2 | -- | 998 mb | Tropical Depression | -- |
| Oct 16 | 15:00 GMT | 16.01 | 133.73 | -- | 998 mb | Tropical Depression | -- |
| Oct 16 | 12:00 GMT | 15.8 | 134.3 | -- | 998 mb | Tropical Depression | -- |
| Oct 16 | 09:00 GMT | 15.74 | 134.75 | -- | 998 mb | Tropical Depression | -- |
| Oct 16 | 06:00 GMT | 15.7 | 135.3 | -- | 998 mb | Tropical Depression | -- |
| Oct 16 | 03:00 GMT | 15.54 | 136.13 | -- | 999 mb | Tropical Depression | -- |
| Oct 16 | 00:00 GMT | 15.3 | 137 | -- | 1,000 mb | Tropical Depression | -- |
| Oct 15 | 21:00 GMT | 15.02 | 137.65 | -- | 1,001 mb | Tropical Depression | -- |
| Oct 15 | 18:00 GMT | 14.7 | 138.3 | -- | 1,002 mb | Tropical Depression | -- |
| Oct 15 | 15:00 GMT | 14.37 | 139.13 | -- | 1,002 mb | Tropical Depression | -- |
| Oct 15 | 12:00 GMT | 14 | 140 | -- | 1,002 mb | Tropical Depression | -- |
| Oct 15 | 09:00 GMT | 13.64 | 140.82 | -- | 1,002 mb | Tropical Depression | -- |
| Oct 15 | 06:00 GMT | 13.2 | 141.6 | -- | 1,002 mb | Tropical Depression | -- |
| Oct 15 | 03:00 GMT | 12.61 | 142.35 | -- | 1,003 mb | Tropical Depression | -- |
| Oct 15 | 00:00 GMT | 12 | 143 | -- | 1,004 mb | Tropical Depression | -- |
| Oct 14 | 21:00 GMT | 11.45 | 143.52 | -- | 1,004 mb | Tropical Depression | -- |
| Oct 14 | 18:00 GMT | 11 | 143.9 | -- | 1,004 mb | Tropical Depression | -- |
| Oct 14 | 15:00 GMT | 10.65 | 144.17 | -- | 1,004 mb | Tropical Depression | -- |
| Oct 14 | 12:00 GMT | 10.4 | 144.4 | -- | 1,004 mb | Tropical Depression | -- |
| Oct 14 | 09:00 GMT | 10.19 | 144.68 | -- | 1,004 mb | Tropical Depression | -- |
| Oct 14 | 06:00 GMT | 10 | 145 | -- | 1,004 mb | Tropical Depression | -- |
Learn more about Tropical Storm Harriet and the 1977 Western Pacific hurricane season in our hurricane archive.
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