Ireland, UK: Storm Bert to bring severe weather across the region through at least Nov. 24 /update 1

Severe weather is forecast to continue across much of Ireland and the UK through at least Nov. 24 due to the passing of Storm Bert. Wintry precipitation, strong winds, and dropping temperatures have been impacting the region in recent days and further heavy snowfall, strong winds, and heavy rainfall are expected as the storm approaches Ireland late Nov. 22 and moves across the UK Nov. 23-24. The heaviest snowfall and strongest winds are likely across Scotland and parts of northern England, with rainfall more likely further south. Sustained heavy rainfall could trigger flooding in low-lying areas in these regions. Hazardous travel conditions are likely in areas where more wintry precipitation occurs due to slippery roads and reduced visibility caused by blowing snow. Sporadic power outages are also possible as a result of adverse weather.

As of Nov. 21, Met Eireann has issued the following weather warnings across the country Nov. 21-23:

• Yellow wind and rain warnings (the lowest level on a three-tier scale): Across Ireland Nov. 22-23.

• Yellow snow/ice warnings: Antrim, Armagh, Derry, Down, Fermanagh, and Tyrone counties Nov. 21-22.

• Yellow low temperature/ice warnings: Across Ireland Nov. 21-22.

The UK's Met Office has issued the following weather warnings Nov. 21-24:

• Amber snow/ice warnings (the middle level on a three-tier scale): Parts of central Scotland Nov. 23.

• Yellow snow/ice warnings: Northern Ireland, much of Scotland, central and northern Wales, and parts of central, northern, southern, and southwestern England Nov. 21-22.

• Yellow rain and snow warnings: Much of Scotland and northern England Nov. 23-24, and Northern Ireland Nov. 23.

• Yellow rain warnings: Much of Wales and parts of southern and southwestern England Nov. 23-24.

• Yellow wind warnings: Northern Ireland, much of Scotland, northern England, and far northwestern and southwestern Wales.

Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming days.

The storm system could produce rounds of heavy precipitation, including rain and snow, and strong winds across the affected area. Where precipitation falls as rain, flash, and areal flooding is possible. Such flooding is possible in low-lying communities near watercourses and other large bodies of water, as well as in urban areas with easily overwhelmed stormwater drainage systems. Sites located downstream of large reservoirs may be subject to flash flooding after relatively short periods of intense rainfall. Precipitation could fall as snow in parts of the affected area over the coming days. Wind gusts could cause blowing and drifting snow; decreased visibility is likely in these areas.

Floodwaters and related debris may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around the affected area. Flooding in urban areas could also result in significant traffic congestion. Heavy snow will likely make driving hazardous in parts of the region; authorities could implement temporary road closures or detours in affected locations.

The disruptive weather will likely cause some delays and cancellations at airports in the region. Flooding or snow could block regional rail lines; freight and passenger train delays and cancellations are possible in areas that see heavy rainfall and potential track blockages.

Disruptions triggered by inclement weather and resultant hazards, such as flooding or strong winds, could persist well after conditions have improved - it could take days before any floodwaters recede and/or officials clear debris. If there is severe damage to infrastructure, repair or reconstruction efforts may result in residual disruptions.