Solar activity on UT day 04-Apr is expected to be at the R1 level, with a chance of R2. S0, with a chance of S1 solar radiation storm conditions are expected. The solar wind speed is expected to be very strong over the UT day. G1-G2 geomagnetic conditions are expected. HF radio propagation conditions are expected to be fair-poor across the Australian region. Maximum Usable Frequencies (MUFs) in the Australian region are expected to be up to 20-30% depressed compared with predicted monthly values. Shortwave fadeouts are possible.