Ann: Targets Defined for April 2023 Diamond Drilling -West Arunta, page-12

Cyclone Bobby (and others) have dumped lots of rain on inland WA after they have become tropical lows/rain bearing depressions.

The remains of Ilsa may be over the West Arunta area in 3 days if the BOM forecast track holds.

DAMAGING WINDS with gusts to 90 km/h may develop between Bidyadanga and Port Hedland during early Thursday afternoon. DAMAGING winds may extend further west to Port Hedland later Thursday if Ilsa moves further to the west. DAMAGING WINDS may extend further to Beagle Bay later Thursday, including Broome, if Ilsa tracks further east. DAMAGING WINDS are expected to extend inland to Marble Bar during Thursday afternoon, to Telfer early Friday and to Kiwirrkurra by Friday evening.

HEAVY RAINFALL and squally thunderstorms are expected over the western Kimberley, and may extend to the eastern Pilbara from Thursday and Northern Interior from Friday. 200 to 400 mm of rainfall is possible during Thursday and Friday near where Ilsa crosses the coast.

Details:

Time (AWST)Intensity CategoryLatitude
(decimal deg.)Longitude
(decimal deg.)Estimated Position
Accuracy (km)0hr5 pm April 12316.2S119.6E35+6hr11 pm April 12316.6S119.3E80+12hr5 am April 13417.1S119.2E95+18hr11 am April 13417.8S119.1E105+24hr5 pm April 13418.6S119.4E115+36hr5 am April 14420.2S121.0E140

+48hr5 pm April 14221.6S124.5E175

+60hr5 am April 15tropical low22.6S129.7E220


+72hr5 pm April 15tropical low23.3S135.7E 290kms possible error by Friday PM.


Large margin of error possible in the track. Still rain of some volume likely.




Kiwirrkurra on Google Earth for reference relative to ENR ground.

Possibly wise to hold off arriving in the area until the situation is clear.
WA1 may/will have to batten down and ride out the weakened storm if it follows the predicted path.

One of the many unknown and unexpected things explorationists have to contend with.