Solar activity on UT day 12-May is expected to be at R2-R3 levels. The solar wind environment has been extremely enhanced due to recent CME arrivals. The solar wind speed is expected to be very strong. G3 geomagnetic storm conditions are expected on 12-May due to further anticipated CME arrivals. An S1 solar radiation storm is in progress. HF radio communication conditions were very poor during the local day yesterday, conditions are expected to be improved for today, before becoming degraded again during local night hours tonight. Maximum usable frequencies are expected to be near predicted monthly values during the local day today then becoming degraded/depressed conditions during local night hours tonight. Frequent shortwave fadeouts are expected. Further auroral sightings may be possible tonight as far north as southern NSW.