File:Helen 1974 track.png
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| Description |
English: Track map of Cyclone Helen of the 1973-74 Australian region cyclone season. The points show the location of the storm at 6-hour intervals. The color represents the storm's maximum sustained wind speeds as classified in the Saffir-Simpson Hurricane Scale (see below), and the shape of the data points represent the nature of the storm, according to the legend below.
Tropical depression (≤38 mph, ≤62 km/h)
Tropical storm (39–73 mph, 63–118 km/h)
Category 1 (74–95 mph, 119–153 km/h)
Category 2 (96–110 mph, 154–177 km/h)
Category 3 (111–129 mph, 178–208 km/h)
Category 4 (130–156 mph, 209–251 km/h)
Category 5 (≥157 mph, ≥252 km/h)
Unknown
Storm type  Extratropical cyclone / Remnant low / Tropical disturbance / Monsoon depression |
| Date | |
| Source | The background image is from NASA. Tracking data is from JTWC |
| Author | Supportstorm |
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:29, 23 June 2013 | | 2,700 × 1,669 (2.34 MB) | Supportstorm (talk | contribs) | {{Information |Description={{en|Track map of Cyclone Helen of the 1973-74 Australian region cyclone season. The points show the location of the ... |
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