Tropical Depression RAMMASUN
at 05:00 HKT 20 July 2014
23.2 N, 104.6 E|
|Maximum sustained wind near centre:
Forecast Positions and Intensities
( Past Positions and Intensities )
|Date time||Position||Classification||Maximum sustained wind near centre|
|05:00 HKT 21 July 2014||23.2 N||100.5 E||Low Pressure Area||40 km/h|
- The symbol will be displayed when the tropical cyclone is expected to weaken into a low pressure area or transform into an extratropical low.
- Past track is in black, forecast track is in red.
- The accuracies, based on average errors, of the latest analysed and forecast positions are of the order of:
|Analysed Position||30 km|
|24-hour forecast position||150 km|
|48-hour forecast position||250 km|
|72-hour forecast position||350 km|
- The centres of the red, blue and grey circles are the forecast positions of the tropical cyclone at different times (as shown at the upper left corner of the figure). The radii of the circles are the respective accuracies.
- when an area of low pressure intensified into a tropical cyclone, the Observatory will issue the information of tropical cyclone track, analysed positions and maximum sustained wind near centre within two hours. It will be updated twice daily at around 10 a.m. and 10 p.m. about two hours after the time of observation. When the tropical cyclone is expected to enter the area bounded by 10N and 30N, 105E and 125E in about 24 hours, the Observatory will also update the tropical cyclone track at 04:00 and 16:00 Hong Kong time (corresponding to the observation time at 02:00 and 14:00 respectively).
- The past tropical cyclone track, analysed positions and maximum sustained wind near centre may be updated when additional data is received.
- Short-term erratic departures of the tropical cyclone from the general direction of movement may occur from time to time. These departures are partly due to uncertainties in locating the centre of the tropical cyclone, and partly due to actual short-term variations in the direction and speed of movement of the tropical cyclone itself.