The sun is really active at the moment and yesterday there was another massive solar flare and coronal mass ejection. What that means is that loads of charged particles are on there way towards Earth and could potentially cause aurora (northern lights).
There is no guarantee this will happen and the weather looks pretty cloudy at the moment. However if it does clear after dark it is well worth going outside and looking to the north. You may see the northern lights as a faint shimmering curtain of light.
There has been lots of activity recently and the aurora got a fair bit if TV coverage yesterday and this morning.