Storm Activity: Jun 13, 1977 - Jun 21, 1977
Jun 21 · 09:00 GMT -- 1,004 mb Extratropical
| Jun 21 | 09:00 GMT | 41.49 | -178.99 | -- | 1,004 mb | Extratropical | -- |
| Jun 21 | 06:00 GMT | 41 | 179 | -- | 1,004 mb | Extratropical | -- |
| Jun 21 | 03:00 GMT | 40.57 | 176.94 | -- | 1,004 mb | Extratropical | -- |
| Jun 21 | 00:00 GMT | 40.3 | 174.8 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 21:00 GMT | 40.27 | 172.57 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 18:00 GMT | 40.3 | 170.3 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 15:00 GMT | 40.18 | 168.11 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 12:00 GMT | 40 | 166 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 09:00 GMT | 39.82 | 164.04 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 06:00 GMT | 39.6 | 162.1 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 03:00 GMT | 39.41 | 160.14 | -- | 1,004 mb | Extratropical | -- |
| Jun 20 | 00:00 GMT | 39 | 158 | -- | 1,004 mb | Extratropical | -- |
| Jun 19 | 21:00 GMT | 38.08 | 155.48 | -- | 1,003 mb | Extratropical | -- |
| Jun 19 | 18:00 GMT | 37 | 153 | -- | 1,002 mb | Extratropical | -- |
| Jun 19 | 15:00 GMT | 36.16 | 150.91 | -- | 1,001 mb | Extratropical | -- |
| Jun 19 | 12:00 GMT | 35.4 | 149 | -- | 1,000 mb | Extratropical | -- |
| Jun 19 | 09:00 GMT | 34.63 | 147.1 | -- | 999 mb | Extratropical | -- |
| Jun 19 | 06:00 GMT | 33.9 | 145.3 | -- | 998 mb | Extratropical | -- |
| Jun 19 | 03:00 GMT | 33.18 | 143.59 | -- | 998 mb | Extratropical | -- |
| Jun 19 | 00:00 GMT | 32.5 | 142 | -- | 998 mb | Extratropical | -- |
| Jun 18 | 21:00 GMT | 31.87 | 140.55 | -- | 998 mb | Extratropical | -- |
| Jun 18 | 18:00 GMT | 31.3 | 139.1 | -- | 998 mb | Extratropical | -- |
| Jun 18 | 15:00 GMT | 30.7 | 137.5 | -- | 998 mb | Extratropical | -- |
| Jun 18 | 12:00 GMT | 30.2 | 135.8 | -- | 998 mb | Extratropical | -- |
| Jun 18 | 09:00 GMT | 29.85 | 134.05 | -- | 998 mb | Extratropical | -- |
| Jun 18 | 06:00 GMT | 29.6 | 132.3 | -- | 998 mb | Extratropical | -- |
| Jun 18 | 03:00 GMT | 29.31 | 130.61 | -- | 999 mb | Extratropical | -- |
| Jun 18 | 00:00 GMT | 29.1 | 129 | -- | 1,000 mb | Extratropical | -- |
| Jun 17 | 21:00 GMT | 29.09 | 127.48 | -- | 1,000 mb | Extratropical | -- |
| Jun 17 | 18:00 GMT | 29 | 126 | -- | 1,000 mb | Extratropical | -- |
| Jun 17 | 15:00 GMT | 28.53 | 124.46 | -- | 1,000 mb | Extratropical | -- |
| Jun 17 | 12:00 GMT | 28 | 123 | -- | 1,000 mb | Extratropical | -- |
| Jun 17 | 09:00 GMT | 27.71 | 121.56 | -- | 1,000 mb | Tropical Depression | -- |
| Jun 17 | 06:00 GMT | 27.5 | 120.5 | -- | 1,000 mb | Tropical Depression | -- |
| Jun 17 | 03:00 GMT | 27.32 | 120.12 | -- | 1,000 mb | Tropical Depression | -- |
| Jun 17 | 00:00 GMT | 27 | 120 | -- | 1,000 mb | Tropical Depression | -- |
| Jun 16 | 21:00 GMT | 26.35 | 119.61 | -- | 997 mb | Tropical Storm | -- |
| Jun 16 | 18:00 GMT | 25.6 | 119.2 | 45 mph | 994 mb | Tropical Storm | -- |
| Jun 16 | 15:00 GMT | 25.04 | 118.86 | 50 mph | 992 mb | Tropical Storm | -- |
| Jun 16 | 12:00 GMT | 24.5 | 118.6 | 50 mph | 990 mb | Tropical Storm | -- |
| Jun 16 | 09:00 GMT | 23.86 | 118.43 | 60 mph | 987 mb | Severe Tropical Storm | -- |
| Jun 16 | 06:00 GMT | 23.2 | 118.3 | 70 mph | 985 mb | Severe Tropical Storm | -- |
| Jun 16 | 03:00 GMT | 22.51 | 118.14 | 70 mph | 982 mb | Severe Tropical Storm | -- |
| Jun 16 | 00:00 GMT | 21.9 | 118 | 70 mph | 980 mb | Severe Tropical Storm | -- |
| Jun 15 | 21:00 GMT | 21.51 | 117.91 | 70 mph | 980 mb | Severe Tropical Storm | -- |
| Jun 15 | 18:00 GMT | 21.2 | 117.8 | 70 mph | 980 mb | Severe Tropical Storm | -- |
| Jun 15 | 15:00 GMT | 20.82 | 117.61 | 70 mph | 980 mb | Severe Tropical Storm | -- |
| Jun 15 | 12:00 GMT | 20.4 | 117.4 | 70 mph | 980 mb | Severe Tropical Storm | -- |
| Jun 15 | 09:00 GMT | 19.91 | 117.25 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Jun 15 | 06:00 GMT | 19.4 | 117.1 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Jun 15 | 03:00 GMT | 18.91 | 116.88 | 60 mph | 977 mb | Tropical Storm | -- |
| Jun 15 | 00:00 GMT | 18.5 | 116.7 | 50 mph | 975 mb | Tropical Storm | -- |
| Jun 14 | 21:00 GMT | 18.24 | 116.67 | 50 mph | 977 mb | Tropical Storm | -- |
| Jun 14 | 18:00 GMT | 18 | 116.7 | 50 mph | 980 mb | Tropical Storm | -- |
| Jun 14 | 15:00 GMT | 17.67 | 116.67 | 50 mph | 982 mb | Tropical Storm | -- |
| Jun 14 | 12:00 GMT | 17.3 | 116.7 | 50 mph | 985 mb | Tropical Storm | -- |
| Jun 14 | 09:00 GMT | 16.97 | 116.9 | 50 mph | 987 mb | Tropical Storm | -- |
| Jun 14 | 06:00 GMT | 16.6 | 117.1 | 50 mph | 990 mb | Tropical Storm | -- |
| Jun 14 | 03:00 GMT | 16.1 | 117.13 | 50 mph | 991 mb | Tropical Storm | -- |
| Jun 14 | 00:00 GMT | 15.6 | 117.1 | 45 mph | 992 mb | Tropical Storm | -- |
| Jun 13 | 21:00 GMT | 15.23 | 117.09 | -- | 996 mb | Tropical Depression | -- |
| Jun 13 | 18:00 GMT | 14.9 | 117.1 | -- | 1,000 mb | Tropical Depression | -- |
| Jun 13 | 15:00 GMT | 14.55 | 117.18 | -- | 1,002 mb | Tropical Depression | -- |
| Jun 13 | 12:00 GMT | 14.2 | 117.3 | -- | 1,004 mb | Tropical Depression | -- |
| Jun 13 | 09:00 GMT | 13.84 | 117.44 | -- | 1,004 mb | Tropical Depression | -- |
| Jun 13 | 06:00 GMT | 13.5 | 117.6 | -- | 1,004 mb | Tropical Depression | -- |
| Jun 13 | 03:00 GMT | 13.23 | 117.79 | -- | 1,006 mb | Tropical Depression | -- |
| Jun 13 | 00:00 GMT | 13 | 118 | -- | 1,008 mb | Tropical Depression | -- |
Learn more about Tropical Storm Ruth and the 1977 Central Pacific hurricane season in our hurricane archive.
View All Hurricanes and Tropical Cyclones