(http://i.telegraph.co.uk/multimedia/archive/02637/northernlights_2637131b.jpg)
According to scientists monitoring solar activity, a mass ejection of particles from the sun two days ago means that the light displays tonight could be of unusual intensity – and that they should be visible from much further south than normal.
Scientists from the Space Weather Prediction Centre in Boulder, Colorado, have predicted that the solar storm that is heading this way could mean that displays of the lights measured on what is called the KP Index could rise from a reading of one (visible in northern Scandinavia) to a reading of seven (visible in southern Wales and parts of southern England).
http://www.telegraph.co.uk/travel/travelnews/10560789/Northern-Lights-sightings-possible-over-Britain.html
There's no reason Northern Ireland shouldn't see a few Northern Lights if you're far enough North and have dark skies.