Solar activity on UT day 26-Apr is expected to be at R0-R1 levels. S0 solar radiation storm conditions are expected. The solar wind speed is expected to be moderate. G0 geomagnetic conditions are expected. HF radio propagation conditions are expected to be mostly normal. Maximum useable frequencies (MUFs) in the Australian region are expected to be near predicted monthly values. Isolated minor shortwave fadeouts are possible.