Storm Activity: Sep 10, 1978 - Sep 15, 1978
Sep 15 · 18:00 GMT -- 998 mb Tropical Depression
| Sep 15 | 18:00 GMT | 35.5 | 135.2 | -- | 998 mb | Tropical Depression | -- |
| Sep 15 | 15:00 GMT | 35.06 | 134.15 | -- | 995 mb | Tropical Storm | -- |
| Sep 15 | 12:00 GMT | 34.7 | 133 | 50 mph | 992 mb | Tropical Storm | -- |
| Sep 15 | 09:00 GMT | 34.47 | 131.72 | 60 mph | 983 mb | Severe Tropical Storm | -- |
| Sep 15 | 06:00 GMT | 34.2 | 130.5 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 15 | 03:00 GMT | 33.72 | 129.58 | 70 mph | 972 mb | Typhoon | -- |
| Sep 15 | 00:00 GMT | 33.2 | 128.8 | 75 mph | 970 mb | Typhoon | 1 |
| Sep 14 | 21:00 GMT | 32.79 | 128.01 | 75 mph | 970 mb | Typhoon | 1 |
| Sep 14 | 18:00 GMT | 32.4 | 127.3 | 75 mph | 970 mb | Typhoon | 1 |
| Sep 14 | 15:00 GMT | 31.93 | 126.71 | 70 mph | 972 mb | Severe Tropical Storm | -- |
| Sep 14 | 12:00 GMT | 31.5 | 126.2 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 14 | 09:00 GMT | 31.21 | 125.69 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 14 | 06:00 GMT | 30.9 | 125.3 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 14 | 03:00 GMT | 30.4 | 125.12 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 14 | 00:00 GMT | 29.9 | 125 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 13 | 21:00 GMT | 29.58 | 124.78 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 13 | 18:00 GMT | 29.3 | 124.5 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 13 | 15:00 GMT | 28.91 | 124.13 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 13 | 12:00 GMT | 28.5 | 123.8 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 13 | 09:00 GMT | 28.13 | 123.65 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 13 | 06:00 GMT | 27.8 | 123.6 | 70 mph | 975 mb | Severe Tropical Storm | -- |
| Sep 13 | 03:00 GMT | 27.5 | 123.59 | 65 mph | 977 mb | Severe Tropical Storm | -- |
| Sep 13 | 00:00 GMT | 27.2 | 123.6 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Sep 12 | 21:00 GMT | 26.86 | 123.6 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Sep 12 | 18:00 GMT | 26.5 | 123.6 | 65 mph | 980 mb | Severe Tropical Storm | -- |
| Sep 12 | 15:00 GMT | 26.13 | 123.65 | 65 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 12 | 12:00 GMT | 25.8 | 123.6 | 65 mph | 990 mb | Severe Tropical Storm | -- |
| Sep 12 | 09:00 GMT | 25.58 | 123.35 | 60 mph | 990 mb | Severe Tropical Storm | -- |
| Sep 12 | 06:00 GMT | 25.4 | 123 | 60 mph | 990 mb | Severe Tropical Storm | -- |
| Sep 12 | 03:00 GMT | 25.23 | 122.66 | 60 mph | 990 mb | Severe Tropical Storm | -- |
| Sep 12 | 00:00 GMT | 25 | 122.4 | 60 mph | 990 mb | Severe Tropical Storm | -- |
| Sep 11 | 21:00 GMT | 24.63 | 122.33 | 55 mph | 992 mb | Tropical Storm | -- |
| Sep 11 | 18:00 GMT | 24.2 | 122.3 | 50 mph | 994 mb | Tropical Storm | -- |
| Sep 11 | 15:00 GMT | 23.81 | 122.16 | -- | 996 mb | Tropical Depression | -- |
| Sep 11 | 12:00 GMT | 23.4 | 122 | -- | 998 mb | Tropical Depression | -- |
| Sep 11 | 09:00 GMT | 22.93 | 121.89 | -- | 998 mb | Tropical Depression | -- |
| Sep 11 | 06:00 GMT | 22.5 | 121.8 | -- | 998 mb | Tropical Depression | -- |
| Sep 11 | 03:00 GMT | 22.23 | 121.71 | -- | 998 mb | Tropical Depression | -- |
| Sep 11 | 00:00 GMT | 22 | 121.6 | -- | 998 mb | Tropical Depression | -- |
| Sep 10 | 21:00 GMT | 21.72 | 121.46 | -- | 999 mb | Tropical Depression | -- |
| Sep 10 | 18:00 GMT | 21.4 | 121.3 | -- | 1,000 mb | Tropical Depression | -- |
Learn more about Typhoon Irma and the 1978 Western Pacific hurricane season in our hurricane archive.
View All Hurricanes and Tropical Cyclones