Typhoon TracksHome › Western North Pacific 1974
Irma (1974, Western North Pacific)
Lowest pressure940 hPa
This is an archive, not a forecast or warning. For current storms follow your national meteorological service.
Peak wind–10-min
Duration13.0 days1974-11-20 – 1974-12-03
Strength rank in 19743 / 32by lowest pressure
All-time rank439 / 19431951–2025
Central pressure over time (hPa)
Compared with other 1974 storms (lowest pressure)
930 hPa
940 hPa
940 hPa
945 hPa
950 hPa
950 hPa
960 hPa
960 hPa
Bar length = depth below 1013 hPa (longer = stronger).
6-hourly track (UTC)
| Time | Lat | Lon | Wind kt | hPa |
|---|---|---|---|---|
| 1974-11-20 00:00 | 8.2 | 145.7 | – | – |
| 1974-11-20 06:00 | 8.1 | 145.0 | – | – |
| 1974-11-20 12:00 | 8.1 | 144.3 | – | – |
| 1974-11-20 18:00 | 8.4 | 143.6 | – | – |
| 1974-11-21 00:00 | 8.8 | 142.8 | – | – |
| 1974-11-21 06:00 | 9.2 | 142.2 | – | 1,000 |
| 1974-11-21 12:00 | 9.7 | 141.6 | – | 1,000 |
| 1974-11-21 18:00 | 10.1 | 141.0 | – | 1,000 |
| 1974-11-22 00:00 | 10.6 | 140.5 | – | 998 |
| 1974-11-22 06:00 | 10.9 | 140.4 | – | 994 |
| 1974-11-22 12:00 | 11.3 | 140.2 | – | 994 |
| 1974-11-22 18:00 | 11.6 | 139.9 | – | 992 |
| 1974-11-23 00:00 | 12.0 | 139.4 | – | 990 |
| 1974-11-23 06:00 | 12.4 | 138.8 | – | 980 |
| 1974-11-23 12:00 | 12.9 | 137.9 | – | 980 |
| 1974-11-23 18:00 | 13.4 | 137.1 | – | 975 |
| 1974-11-24 00:00 | 13.7 | 136.2 | – | 975 |
| 1974-11-24 06:00 | 14.1 | 135.3 | – | 970 |
| 1974-11-24 12:00 | 14.4 | 134.6 | – | 965 |
| 1974-11-24 18:00 | 14.7 | 133.9 | – | 960 |
| 1974-11-25 00:00 | 15.0 | 133.4 | – | 955 |
| 1974-11-25 06:00 | 15.2 | 132.9 | – | 950 |
| 1974-11-25 12:00 | 15.5 | 132.3 | – | 950 |
| 1974-11-25 18:00 | 15.6 | 131.6 | – | 945 |
| 1974-11-26 00:00 | 15.7 | 130.8 | – | 940 |
| 1974-11-26 06:00 | 15.7 | 129.9 | – | 940 |
| 1974-11-26 12:00 | 15.7 | 128.8 | – | 940 |
| 1974-11-26 18:00 | 15.7 | 127.7 | – | 940 |
| 1974-11-27 00:00 | 15.7 | 126.4 | – | 940 |
| 1974-11-27 06:00 | 15.7 | 125.3 | – | 940 |
| 1974-11-27 12:00 | 15.6 | 124.2 | – | 940 |
| 1974-11-27 18:00 | 15.6 | 123.0 | – | 940 |
| 1974-11-28 00:00 | 15.5 | 121.7 | – | 980 |
| 1974-11-28 06:00 | 15.3 | 120.6 | – | 985 |
| 1974-11-28 12:00 | 15.2 | 119.5 | – | 985 |
| 1974-11-28 18:00 | 15.3 | 118.5 | – | 985 |
| 1974-11-29 00:00 | 15.5 | 117.4 | – | 980 |
| 1974-11-29 06:00 | 15.6 | 116.4 | – | 980 |
| 1974-11-29 12:00 | 15.8 | 115.4 | – | 980 |
| 1974-11-29 18:00 | 15.9 | 114.3 | – | 985 |
| 1974-11-30 00:00 | 16.2 | 113.4 | – | 985 |
| 1974-11-30 06:00 | 16.6 | 112.7 | – | 975 |
| 1974-11-30 12:00 | 17.0 | 112.3 | – | 970 |
| 1974-11-30 18:00 | 17.7 | 112.0 | – | 970 |
| 1974-12-01 00:00 | 18.5 | 111.7 | – | 970 |
| 1974-12-01 06:00 | 19.3 | 111.7 | – | 975 |
| 1974-12-01 12:00 | 20.2 | 111.8 | – | 990 |
| 1974-12-01 18:00 | 20.9 | 112.2 | – | 995 |
| 1974-12-02 00:00 | 21.6 | 112.8 | – | 1,002 |
| 1974-12-02 06:00 | 22.4 | 113.5 | – | 1,004 |
| 1974-12-02 12:00 | 22.9 | 114.2 | – | 1,006 |
| 1974-12-02 18:00 | 23.3 | 114.9 | – | 1,008 |
| 1974-12-03 00:00 | 23.5 | 116.0 | – | 1,010 |
Winds are RSMC Tokyo (JMA) 10-minute sustained winds and central pressure (winds recorded from 1977).