On UT day 20-Jun solar activity is expected to be R1. S0 solar radiation storm conditions are expected. The solar wind speed is expected to be moderate due to the ongoing influence of a coronal hole wind stream. G0, chance G1 geomagnetic conditions are expected. HF radio propagation conditions are expected to be fair to normal. Maximum usable frequencies in the Australian region are expected to be mildly depressed by 15% to near predicted monthly values.