Typhoon TracksHome › Western North Pacific 1999
Sam (1999, Western North Pacific)
Lowest pressure980 hPa
This is an archive, not a forecast or warning. For current storms follow your national meteorological service.
Peak wind55 kt (28 m/s)10-min
Duration9.2 days1999-08-17 – 1999-08-27
Strength rank in 19999 / 22by lowest pressure
All-time rank1227 / 19431951–2025
Peak wind over time (kt)
Central pressure over time (hPa)
Compared with other 1999 storms (lowest pressure)
970 hPa
970 hPa
980 hPa
980 hPa
980 hPa
980 hPa
980 hPa
980 hPa
985 hPa
985 hPa
988 hPa
Bar length = depth below 1013 hPa (longer = stronger).
6-hourly track (UTC)
| Time | Lat | Lon | Wind kt | hPa |
|---|---|---|---|---|
| 1999-08-17 18:00 | 11.6 | 128.8 | – | 1,004 |
| 1999-08-18 00:00 | 12.1 | 128.9 | – | 1,004 |
| 1999-08-18 06:00 | 13.1 | 128.6 | – | 1,004 |
| 1999-08-18 12:00 | 13.7 | 127.8 | – | 1,004 |
| 1999-08-18 18:00 | 14.5 | 126.9 | – | 1,004 |
| 1999-08-19 00:00 | 15.3 | 126.0 | – | 1,002 |
| 1999-08-19 06:00 | 16.2 | 125.0 | 40 | 998 |
| 1999-08-19 12:00 | 16.8 | 124.3 | 40 | 994 |
| 1999-08-19 18:00 | 17.4 | 123.3 | 45 | 992 |
| 1999-08-20 00:00 | 18.1 | 122.2 | 45 | 990 |
| 1999-08-20 06:00 | 18.4 | 120.9 | 45 | 990 |
| 1999-08-20 12:00 | 18.5 | 120.2 | 50 | 985 |
| 1999-08-20 18:00 | 18.8 | 119.3 | 50 | 985 |
| 1999-08-21 00:00 | 19.2 | 118.6 | 55 | 980 |
| 1999-08-21 06:00 | 19.8 | 117.7 | 55 | 980 |
| 1999-08-21 12:00 | 20.3 | 116.9 | 55 | 980 |
| 1999-08-21 18:00 | 21.0 | 115.9 | 55 | 980 |
| 1999-08-22 00:00 | 21.7 | 115.2 | 55 | 980 |
| 1999-08-22 06:00 | 22.2 | 114.6 | 55 | 980 |
| 1999-08-22 12:00 | 22.6 | 114.0 | 50 | 985 |
| 1999-08-22 18:00 | 23.0 | 113.2 | 40 | 994 |
| 1999-08-23 00:00 | 23.4 | 112.8 | – | 1,000 |
| 1999-08-23 06:00 | 23.8 | 112.7 | – | 1,004 |
| 1999-08-23 12:00 | 24.3 | 112.8 | – | 1,006 |
| 1999-08-23 18:00 | 25.0 | 113.2 | – | 1,008 |
| 1999-08-24 00:00 | 25.7 | 113.9 | – | 1,008 |
| 1999-08-24 06:00 | 26.7 | 114.1 | – | 1,008 |
| 1999-08-24 12:00 | 28.0 | 114.7 | – | 1,008 |
| 1999-08-24 18:00 | 30.1 | 115.7 | – | 1,006 |
| 1999-08-25 00:00 | 31.0 | 117.2 | – | 1,006 |
| 1999-08-25 06:00 | 31.8 | 119.6 | – | 1,004 |
| 1999-08-25 12:00 | 32.5 | 121.6 | – | 1,004 |
| 1999-08-25 18:00 | 33.3 | 123.4 | – | 1,004 |
| 1999-08-26 00:00 | 34.4 | 126.6 | – | 1,006 |
| 1999-08-26 06:00 | 35.4 | 129.9 | – | 1,006 |
| 1999-08-26 12:00 | 36.3 | 132.2 | – | 1,008 |
| 1999-08-26 18:00 | 37.2 | 134.9 | – | 1,006 |
| 1999-08-27 00:00 | 37.8 | 136.6 | – | 1,008 |
Winds are RSMC Tokyo (JMA) 10-minute sustained winds and central pressure (winds recorded from 1977).