A rain warning has been issued for Saturday.
The first is in effect across Scotland and indicates that heavy showers and rain may lead to flooding in places.
Bus and train services are likely to be affected, with longer journey times possible.
Spray and flooding on the roads will probably make car journey times longer and flooding of a few homes and businesses is possible.
It is likely up to 1.6 inches (40mm) of rainfall could be seen in some areas.
The warning reads: “Although intense thunderstorms become less likely for most areas across Scotland and Northern Ireland, heavy showers and more prolonged rain will continue at times, still with the possibility of thunder.
“These may bring 10 to 20mm per hour for some places during Saturday, with perhaps 30 to 40mm over a few hours. The ground is getting wetter now, so this may cause a few issues.”