On UT day 30-Dec solar activity is expected to be R1-R2. The solar wind speed is expected to be moderate trending high by end of day. G0-G1 geomagnetic conditions are expected with a chance of G2 towards the end of the day. HF radio propagation conditions are expected to be normal, possibly becoming degraded by end of day. Maximum usable frequencies are expected to be near predicted values. S0 solar radiation storm conditions are expected.