10 Nov 2022 | 12:16 PM UTC
Norway: Adverse weather forecast across southwestern regions through at least Nov. 12
Severe weather forecast in parts of southwestern Norway through Nov. 12. Flooding, landslides, and associated disruptions possible.
Event
Heavy rainfall is forecast to bring a threat of flooding and debris flows across parts of southwestern Norway through at least Nov. 12. The affected area includes much of Vestland, More og Romsdal, and Rogaland counties, as well as parts of western Innlandet County. Rainfall totals of 5-15 cm (2-6 inches) are possible across the affected area Nov. 10-11, with the heaviest totals likely in Vestland County. The heavy downpours cause rivers to overflow as well as slushy avalanches and landslides.
As of Nov. 10, the Norwegian Meteorological Institute has issued the following weather warnings across the affected area:
Orange rainfall, flood, and landslide warnings (the middle level on a three-tier scale): Across much of Vestalnd County.
Yellow rainfall, flood, and landslide warnings; Across the rest of the affected area.
Officials could update and possibly extend the coverage of weather alerts over the coming days.
Hazardous Conditions
Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites located downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly and mountainous areas, especially where the soil has become saturated by heavy rainfall.
Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.
Transport
Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.
Severe weather could also trigger flight delays and cancellations at airports in affected regions. Flooding could block regional rail lines; freight and passenger train delays and cancellations are likely in areas that see heavy rainfall and potential track inundation.
Localized business disruptions may occur in low-lying areas; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.
Advice
Monitor local media for weather updates and related advisories. Confirm all transport reservations and business appointments before travel. Make allowances for localized travel delays and potential supply chain disruptions where flooding has been forecast. Do not drive on flooded roads. Charge battery-powered devices in the case of prolonged electricity outages.
