Solar flare activity on UT day 23-Sep is expected to be R0, with a chance of R1. S0 solar radiation storm conditions are expected. The solar wind speed is expected to be light to moderate over the UT day. G0 geomagnetic conditions are expected. Global high frequency radio propagation conditions are expected to be mostly normal, although high latitude regions will likely begin to experience degradation due to anticipated geomagnetic activity. Maximum Usable Frequencies (MUFs) in the Australian region are expected to be near predicted monthly values.