Solar flare activity on UT day 07-Sep is expected to be at R0-R1 levels. S0 solar radiation storm conditions are expected, with a chance of S1. The solar wind speed is expected to be light to moderate. G0 geomagnetic conditions are expected. HF radio propagation conditions are expected to be mostly normal, with degraded conditions at equatorial regions during local night hours. Maximum usable frequencies in the Australian region are expected to be near predicted monthly values.