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Helen (1964, Western North Pacific)
Lowest pressure930 hPa
This is an archive, not a forecast or warning. For current storms follow your national meteorological service.
Peak wind–10-min
Duration9.8 days1964-07-27 – 1964-08-05
Strength rank in 19646 / 33by lowest pressure
All-time rank295 / 19431951–2025
Central pressure over time (hPa)
Compared with other 1964 storms (lowest pressure)
895 hPa
895 hPa
900 hPa
915 hPa
925 hPa
930 hPa
948 hPa
960 hPa
960 hPa
965 hPa
968 hPa
Bar length = depth below 1013 hPa (longer = stronger).
6-hourly track (UTC)
| Time | Lat | Lon | Wind kt | hPa |
|---|---|---|---|---|
| 1964-07-27 00:00 | 16.9 | 150.0 | – | 1,006 |
| 1964-07-27 06:00 | 17.6 | 149.9 | – | 1,006 |
| 1964-07-27 12:00 | 18.5 | 149.7 | – | 1,006 |
| 1964-07-27 18:00 | 19.3 | 149.4 | – | 1,004 |
| 1964-07-28 00:00 | 19.9 | 149.0 | – | 1,004 |
| 1964-07-28 06:00 | 20.5 | 148.6 | – | 1,004 |
| 1964-07-28 12:00 | 20.9 | 147.9 | – | 1,004 |
| 1964-07-28 18:00 | 21.4 | 147.1 | – | 995 |
| 1964-07-29 00:00 | 22.2 | 146.3 | – | 985 |
| 1964-07-29 06:00 | 22.5 | 145.2 | – | 970 |
| 1964-07-29 12:00 | 22.6 | 144.1 | – | 960 |
| 1964-07-29 18:00 | 22.9 | 143.3 | – | 950 |
| 1964-07-30 00:00 | 23.3 | 142.6 | – | 945 |
| 1964-07-30 06:00 | 23.9 | 141.7 | – | 930 |
| 1964-07-30 12:00 | 24.7 | 140.7 | – | 940 |
| 1964-07-30 18:00 | 25.3 | 139.4 | – | 950 |
| 1964-07-31 00:00 | 26.2 | 138.1 | – | 955 |
| 1964-07-31 06:00 | 27.1 | 136.8 | – | 955 |
| 1964-07-31 12:00 | 27.8 | 135.2 | – | 955 |
| 1964-07-31 18:00 | 28.5 | 133.7 | – | 960 |
| 1964-08-01 00:00 | 29.2 | 132.2 | – | 965 |
| 1964-08-01 06:00 | 29.8 | 131.0 | – | 965 |
| 1964-08-01 12:00 | 30.7 | 129.7 | – | 965 |
| 1964-08-01 18:00 | 31.5 | 128.5 | – | 965 |
| 1964-08-02 00:00 | 32.3 | 127.6 | – | 965 |
| 1964-08-02 06:00 | 33.3 | 126.8 | – | 970 |
| 1964-08-02 12:00 | 34.3 | 125.9 | – | 970 |
| 1964-08-02 18:00 | 35.2 | 125.0 | – | 975 |
| 1964-08-03 00:00 | 36.4 | 123.9 | – | 980 |
| 1964-08-03 06:00 | 37.5 | 123.0 | – | 990 |
| 1964-08-03 12:00 | 38.6 | 122.3 | – | 995 |
| 1964-08-03 18:00 | 39.7 | 121.9 | – | 1,000 |
| 1964-08-04 00:00 | 42.0 | 122.4 | – | 1,000 |
| 1964-08-04 06:00 | 43.9 | 123.4 | – | 1,000 |
| 1964-08-04 12:00 | 45.6 | 124.9 | – | 998 |
| 1964-08-04 18:00 | 46.7 | 127.5 | – | 996 |
| 1964-08-05 00:00 | 47.7 | 132.3 | – | 994 |
| 1964-08-05 06:00 | 47.4 | 137.8 | – | 994 |
| 1964-08-05 12:00 | 46.7 | 140.4 | – | 998 |
| 1964-08-05 18:00 | 46.8 | 145.0 | – | 996 |
Winds are RSMC Tokyo (JMA) 10-minute sustained winds and central pressure (winds recorded from 1977).