Storm Activity: Sep 14, 1999 - Sep 20, 1999
Sep 20 · 12:00 GMT -- 1,006 mb Extratropical
| Sep 20 | 12:00 GMT | 33.9 | 125.4 | -- | 1,006 mb | Extratropical | -- |
| Sep 20 | 09:00 GMT | 34.12 | 125.06 | -- | 1,004 mb | Extratropical | -- |
| Sep 20 | 06:00 GMT | 34.3 | 124.8 | -- | 1,002 mb | Extratropical | -- |
| Sep 20 | 03:00 GMT | 34.41 | 124.66 | -- | 1,002 mb | Extratropical | -- |
| Sep 20 | 00:00 GMT | 34.5 | 124.6 | -- | 1,002 mb | Extratropical | -- |
| Sep 19 | 21:00 GMT | 34.69 | 124.66 | -- | 1,001 mb | Extratropical | -- |
| Sep 19 | 18:00 GMT | 34.8 | 124.5 | -- | 1,000 mb | Extratropical | -- |
| Sep 19 | 15:00 GMT | 34.75 | 123.74 | -- | 999 mb | Tropical Storm | -- |
| Sep 19 | 12:00 GMT | 34.5 | 122.9 | 40 mph | 998 mb | Tropical Storm | -- |
| Sep 19 | 09:00 GMT | 34.05 | 122.5 | 40 mph | 997 mb | Tropical Storm | -- |
| Sep 19 | 06:00 GMT | 33.5 | 122.3 | 40 mph | 996 mb | Tropical Storm | -- |
| Sep 19 | 03:00 GMT | 32.98 | 122.05 | 40 mph | 996 mb | Tropical Storm | -- |
| Sep 19 | 00:00 GMT | 32.5 | 122 | 40 mph | 996 mb | Tropical Storm | -- |
| Sep 18 | 21:00 GMT | 32.13 | 122.27 | 45 mph | 994 mb | Tropical Storm | -- |
| Sep 18 | 18:00 GMT | 31.8 | 122.7 | 45 mph | 992 mb | Tropical Storm | -- |
| Sep 18 | 15:00 GMT | 31.45 | 123.12 | 45 mph | 992 mb | Tropical Storm | -- |
| Sep 18 | 12:00 GMT | 31.1 | 123.5 | 45 mph | 992 mb | Tropical Storm | -- |
| Sep 18 | 09:00 GMT | 30.72 | 123.7 | 50 mph | 991 mb | Tropical Storm | -- |
| Sep 18 | 06:00 GMT | 30.4 | 123.9 | 50 mph | 990 mb | Tropical Storm | -- |
| Sep 18 | 03:00 GMT | 30.22 | 124.23 | 50 mph | 990 mb | Tropical Storm | -- |
| Sep 18 | 00:00 GMT | 30.1 | 124.7 | 50 mph | 990 mb | Tropical Storm | -- |
| Sep 17 | 21:00 GMT | 29.93 | 125.48 | 50 mph | 990 mb | Tropical Storm | -- |
| Sep 17 | 18:00 GMT | 29.8 | 126.1 | 50 mph | 990 mb | Tropical Storm | -- |
| Sep 17 | 15:00 GMT | 29.77 | 126.08 | 55 mph | 987 mb | Severe Tropical Storm | -- |
| Sep 17 | 12:00 GMT | 29.8 | 125.9 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 17 | 09:00 GMT | 29.84 | 126.06 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 17 | 06:00 GMT | 29.9 | 126.3 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 17 | 03:00 GMT | 29.96 | 126.44 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 17 | 00:00 GMT | 30 | 126.6 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 16 | 21:00 GMT | 29.96 | 126.92 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 16 | 18:00 GMT | 29.9 | 127.2 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 16 | 15:00 GMT | 29.91 | 127.27 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 16 | 12:00 GMT | 29.9 | 127.3 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 16 | 09:00 GMT | 29.8 | 127.4 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 16 | 06:00 GMT | 29.7 | 127.5 | 60 mph | 985 mb | Severe Tropical Storm | -- |
| Sep 16 | 03:00 GMT | 29.7 | 127.7 | 45 mph | 990 mb | Tropical Storm | -- |
| Sep 16 | 00:00 GMT | 29.5 | 128.1 | 40 mph | 994 mb | Tropical Storm | -- |
| Sep 15 | 21:00 GMT | 28.97 | 128.76 | -- | 996 mb | Tropical Depression | -- |
| Sep 15 | 18:00 GMT | 28.3 | 129.3 | -- | 998 mb | Tropical Depression | -- |
| Sep 15 | 15:00 GMT | 27.76 | 129.24 | -- | 1,000 mb | Tropical Depression | -- |
| Sep 15 | 12:00 GMT | 27.3 | 129 | -- | 1,002 mb | Tropical Depression | -- |
| Sep 15 | 09:00 GMT | 26.88 | 128.96 | -- | 1,002 mb | Tropical Depression | -- |
| Sep 15 | 06:00 GMT | 26.6 | 129 | -- | 1,002 mb | Tropical Depression | -- |
| Sep 15 | 03:00 GMT | 26.51 | 129.08 | -- | 1,003 mb | Tropical Depression | -- |
| Sep 15 | 00:00 GMT | 26.5 | 129.2 | -- | 1,004 mb | Tropical Depression | -- |
| Sep 14 | 21:00 GMT | 26.52 | 129.45 | -- | 1,004 mb | Tropical Depression | -- |
| Sep 14 | 18:00 GMT | 26.4 | 129.5 | -- | 1,004 mb | Tropical Depression | -- |
| Sep 14 | 15:00 GMT | 25.95 | 129.09 | -- | 1,004 mb | Tropical Depression | -- |
| Sep 14 | 12:00 GMT | 25.3 | 128.4 | -- | 1,004 mb | Tropical Depression | -- |
Learn more about Tropical Storm Ann and the 1999 Western Pacific hurricane season in our hurricane archive.
View All Hurricanes and Tropical Cyclones