Solar activity on UT day 18-Oct is expected to be at R1, chance R2 levels. The solar wind speed is expected to become moderate due to a coronal hole wind stream. G0, chance G1 geomagnetic conditions are expected. S0 solar radiation storm conditions are expected. HF radio communication conditions are expected to be fair to normal. Maximum useable frequencies (MUFs) are expected to be near predicted monthly values to 15% enhanced. Mildly degraded HF conditions may be experienced during local night hours for the southern Australian region. Shortwave fadeouts are possible.