Storm Activity: Jul 8, 1958 - Jul 17, 1958
Jul 17 · 06:00 GMT -- 1,002 mb Extratropical
| Jul 17 | 06:00 GMT | 49 | 177 | -- | 1,002 mb | Extratropical | -- |
| Jul 17 | 03:00 GMT | 49.25 | 176.95 | -- | 1,003 mb | Extratropical | -- |
| Jul 17 | 00:00 GMT | 49 | 177 | -- | 1,004 mb | Extratropical | -- |
| Jul 16 | 21:00 GMT | 47.98 | 177.16 | -- | 1,003 mb | Extratropical | -- |
| Jul 16 | 18:00 GMT | 46.7 | 177 | -- | 1,002 mb | Extratropical | -- |
| Jul 16 | 15:00 GMT | 45.83 | 176.3 | -- | 1,003 mb | Extratropical | -- |
| Jul 16 | 12:00 GMT | 45 | 175 | -- | 1,004 mb | Extratropical | -- |
| Jul 16 | 09:00 GMT | 43.96 | 173.28 | -- | 1,004 mb | Extratropical | -- |
| Jul 16 | 06:00 GMT | 42.9 | 171.1 | -- | 1,004 mb | Extratropical | -- |
| Jul 16 | 03:00 GMT | 41.87 | 168.55 | -- | 1,005 mb | Extratropical | -- |
| Jul 16 | 00:00 GMT | 41 | 166 | -- | 1,006 mb | Extratropical | -- |
| Jul 15 | 21:00 GMT | 40.46 | 163.93 | -- | 1,006 mb | Extratropical | -- |
| Jul 15 | 18:00 GMT | 40 | 162 | -- | 1,006 mb | Extratropical | -- |
| Jul 15 | 15:00 GMT | 39.29 | 159.91 | -- | 1,006 mb | Extratropical | -- |
| Jul 15 | 12:00 GMT | 38.5 | 158 | -- | 1,006 mb | Extratropical | -- |
| Jul 15 | 09:00 GMT | 37.69 | 156.48 | -- | 1,003 mb | Extratropical | -- |
| Jul 15 | 06:00 GMT | 37 | 155.2 | -- | 1,000 mb | Extratropical | -- |
| Jul 15 | 03:00 GMT | 36.58 | 153.9 | -- | 999 mb | Extratropical | -- |
| Jul 15 | 00:00 GMT | 36.3 | 152.9 | -- | 998 mb | Extratropical | -- |
| Jul 14 | 21:00 GMT | 36.05 | 152.37 | -- | 998 mb | Extratropical | -- |
| Jul 14 | 18:00 GMT | 35.8 | 152.1 | -- | 998 mb | Extratropical | -- |
| Jul 14 | 15:00 GMT | 35.45 | 151.78 | -- | 999 mb | Extratropical | -- |
| Jul 14 | 12:00 GMT | 35.1 | 151.5 | -- | 1,000 mb | Extratropical | -- |
| Jul 14 | 09:00 GMT | 34.84 | 151.24 | -- | 1,000 mb | Extratropical | -- |
| Jul 14 | 06:00 GMT | 34.6 | 151 | -- | 1,000 mb | Extratropical | -- |
| Jul 14 | 03:00 GMT | 34.31 | 150.75 | -- | 997 mb | Unknown | -- |
| Jul 14 | 00:00 GMT | 34 | 150.5 | -- | 995 mb | Unknown | -- |
| Jul 13 | 21:00 GMT | 33.77 | 150.29 | -- | 992 mb | Unknown | -- |
| Jul 13 | 18:00 GMT | 33.4 | 150 | -- | 990 mb | Unknown | -- |
| Jul 13 | 15:00 GMT | 32.73 | 149.54 | -- | 990 mb | Unknown | -- |
| Jul 13 | 12:00 GMT | 31.9 | 149 | -- | 990 mb | Unknown | -- |
| Jul 13 | 09:00 GMT | 31.05 | 148.52 | -- | 987 mb | Unknown | -- |
| Jul 13 | 06:00 GMT | 30.3 | 147.9 | -- | 985 mb | Unknown | -- |
| Jul 13 | 03:00 GMT | 29.78 | 146.98 | -- | 977 mb | Unknown | -- |
| Jul 13 | 00:00 GMT | 29.4 | 146 | -- | 970 mb | Unknown | -- |
| Jul 12 | 21:00 GMT | 29.08 | 145.22 | -- | 972 mb | Unknown | -- |
| Jul 12 | 18:00 GMT | 28.8 | 144.5 | -- | 975 mb | Unknown | -- |
| Jul 12 | 15:00 GMT | 28.52 | 143.75 | -- | 975 mb | Unknown | -- |
| Jul 12 | 12:00 GMT | 28.2 | 143 | -- | 975 mb | Unknown | -- |
| Jul 12 | 09:00 GMT | 27.81 | 142.22 | -- | 972 mb | Unknown | -- |
| Jul 12 | 06:00 GMT | 27.3 | 141.5 | -- | 970 mb | Unknown | -- |
| Jul 12 | 03:00 GMT | 26.63 | 140.86 | -- | 970 mb | Unknown | -- |
| Jul 12 | 00:00 GMT | 25.9 | 140.4 | -- | 970 mb | Unknown | -- |
| Jul 11 | 21:00 GMT | 25.23 | 140.19 | -- | 967 mb | Unknown | -- |
| Jul 11 | 18:00 GMT | 24.6 | 140.1 | -- | 965 mb | Unknown | -- |
| Jul 11 | 15:00 GMT | 24.01 | 139.94 | -- | 965 mb | Unknown | -- |
| Jul 11 | 12:00 GMT | 23.4 | 139.8 | -- | 965 mb | Unknown | -- |
| Jul 11 | 09:00 GMT | 22.74 | 139.68 | -- | 965 mb | Unknown | -- |
| Jul 11 | 06:00 GMT | 22 | 139.6 | -- | 965 mb | Unknown | -- |
| Jul 11 | 03:00 GMT | 21.14 | 139.56 | -- | 967 mb | Unknown | -- |
| Jul 11 | 00:00 GMT | 20.3 | 139.6 | -- | 970 mb | Unknown | -- |
| Jul 10 | 21:00 GMT | 19.61 | 139.76 | -- | 970 mb | Unknown | -- |
| Jul 10 | 18:00 GMT | 19 | 140 | -- | 970 mb | Unknown | -- |
| Jul 10 | 15:00 GMT | 18.4 | 140.24 | -- | 972 mb | Unknown | -- |
| Jul 10 | 12:00 GMT | 17.8 | 140.5 | -- | 975 mb | Unknown | -- |
| Jul 10 | 09:00 GMT | 17.17 | 140.79 | -- | 977 mb | Unknown | -- |
| Jul 10 | 06:00 GMT | 16.5 | 141.1 | -- | 980 mb | Unknown | -- |
| Jul 10 | 03:00 GMT | 15.77 | 141.38 | -- | 982 mb | Unknown | -- |
| Jul 10 | 00:00 GMT | 15.1 | 141.7 | -- | 985 mb | Unknown | -- |
| Jul 9 | 21:00 GMT | 14.58 | 142.14 | -- | 987 mb | Unknown | -- |
| Jul 9 | 18:00 GMT | 14.2 | 142.6 | -- | 990 mb | Unknown | -- |
| Jul 9 | 15:00 GMT | 13.94 | 142.96 | -- | 990 mb | Unknown | -- |
| Jul 9 | 12:00 GMT | 13.7 | 143.3 | -- | 990 mb | Unknown | -- |
| Jul 9 | 09:00 GMT | 13.28 | 143.73 | -- | 992 mb | Unknown | -- |
| Jul 9 | 06:00 GMT | 12.9 | 144.1 | -- | 995 mb | Unknown | -- |
| Jul 9 | 03:00 GMT | 12.78 | 144.25 | -- | 995 mb | Unknown | -- |
| Jul 9 | 00:00 GMT | 12.7 | 144.4 | -- | 995 mb | Unknown | -- |
| Jul 8 | 21:00 GMT | 12.47 | 144.78 | -- | 995 mb | Unknown | -- |
| Jul 8 | 18:00 GMT | 12.2 | 145.2 | -- | 995 mb | Unknown | -- |
| Jul 8 | 15:00 GMT | 11.95 | 145.51 | -- | 995 mb | Unknown | -- |
| Jul 8 | 12:00 GMT | 11.7 | 145.8 | -- | 995 mb | Unknown | -- |
| Jul 8 | 09:00 GMT | 11.44 | 146.11 | -- | 997 mb | Unknown | -- |
| Jul 8 | 06:00 GMT | 11.2 | 146.5 | -- | 1,000 mb | Unknown | -- |
| Jul 8 | 03:00 GMT | 10.99 | 147.01 | -- | 1,003 mb | Tropical Depression | -- |
| Jul 8 | 00:00 GMT | 10.8 | 147.6 | -- | 1,006 mb | Tropical Depression | -- |
Learn more about Tropical Depression Viola and the 1958 Western Pacific hurricane season in our hurricane archive.
View All Hurricanes and Tropical Cyclones