Space weather forecasting -- predicting the kind of energetic particles the Sun will throw at us -- is years behind weather forecasting here on Earth. As solar physicist Scott McIntosh put it, "Our current model of space weather forecasting is, 'oh shit a sunspot happened eight minutes ago, now we have to figure out what's going to happen.'" It's a shame we're not better at predicting space weather, since it can bust up satellites and even electronics on Earth.