Solar flare activity on UT day 21-Aug is expected to be at R1-R2 levels. S0 solar radiation storm conditions are expected. The solar wind speed is expected to be strong to moderate. G0 geomagnetic conditions are expected. Global high frequency radio propagation conditions are expected to be mostly normal. Maximum Usable Frequencies (MUFs) in the Australian region are expected to be near predicted monthly values. Shortwave fadeouts are probable.