The forecast path shown above is the Bureau's best estimate of the cyclone's future movement and intensity. There is always some uncertainty associated with tropical cyclone forecasting and the grey zone indicates the range of likely tracks of the cyclone centre.
Due to the uncertainty in the future movement, the indicated winds will almost certainly extend to regions outside the rings on this map. The extent of the warning and watch zones reflects this.
This product is designed for land-based communities; mariners should read the coastal waters and high seas warnings.
Severe Tropical Cyclone Jack is moving slowly towards the southeast over open waters and is likely to weaken during Monday. The system poses no direct threat to the Cocos Islands or mainland Western Australia.
Name: Severe Tropical Cyclone Jack
|Time (WST)||Intensity Category||Latitude
|0hr||2 am April 21||3||15.2S||91.3E||55|
|+6hr||8 am April 21||2||15.6S||91.6E||80|
|+12hr||2 pm April 21||1||15.8S||91.8E||100|
|+18hr||8 pm April 21||1||16.1S||91.9E||125|
|+24hr||2 am April 22||1||16.5S||92.0E||145|
|+36hr||2 pm April 22||tropical low||17.5S||92.4E||180|
|+48hr||2 am April 23||tropical low||18.3S||92.9E||220|
|+60hr||2 pm April 23||tropical low||18.8S||93.0E||255|
|+72hr||2 am April 24||tropical low||18.8S||93.7E||290|
Tropical Cyclone information is also available in MetEye
The next Forecast Track Map will be issued by 9:00 am WST Monday