Solar activity on UT day 05-Jun is expected to be at R1-R2 levels. S0 solar radiation storm conditions are expected. The solar wind speed is expected to be strong. G0 geomagnetic conditions are expected, with a chance of G1. HF radio propagation conditions are expected to be normal to fair. Maximum usable frequencies (MUFs) in the Australian region are expected to be depressed at the start of the UT day recovering towards monthly predicted values over the day. Shortwave fadeouts are possible.