Solar flare activity on UT day 21-Jan is expected to be at R1-R2 levels. S1 solar radiation storm conditions are expected. The solar wind speed is expected to be very strong. G2-G3 geomagnetic conditions are expected. HF radio propagation conditions are expected to be fair to poor. Maximum usable frequencies (MUFs) in the Australian region are expected to be 25-50% depressed. Shortwave fadeouts are possible.