WATCH: Large thunderstorm currently tracking across Offaly as Met Eireann upgrades Thunderstorm Warning level to Orange

A large thunderstorm is currently tracking across Offaly bringing with it constant flashes of lightning, rattling claps of thunder and intense rain. 

The thunderstorm is tracking from the Slieve Bloom Mountains in the general direction of Cloghan and Ferbane. 

Within the last hour, Met Eireann has increased a Status Yellow Thunderstorm Warning to Orange for Cavan, Donegal, Clare, Connacht, Longford, Offaly and Westmeath.

Met Eireann warns that thunderstorms and very heavy showers will produce significant rainfall accumulations over short time periods with lash flooding, very difficult travelling conditions with reduced visibility and possible power outages.

That warning remains in place until 10pm with a Status Yellow Warning in effect for 20 counties, including those listed above,