On UT day 24-Apr solar activity is expected to be R0-R1. S0 solar radiation storm conditions are expected. The solar wind speed is expected to be strong due to a coronal hole wind stream. G0, chance G1 geomagnetic conditions are expected. HF radio propagation conditions are expected to be fair to normal, with fair conditions during local night hours for the southern Australian region. Maximum usable frequencies in the Australian region are expected to be near predicted values.