07 Dec 2022 | 02:50 AM UTC
Canada: Adverse weather forecast in eastern regions through at least Dec. 9
Severe weather forecast across parts of eastern Canada through Dec. 9. Possible transport, business, and utility disruptions.
Event
Heavy rainfall is forecast over northern and central New Brunswick and southeastern Quebec provinces through at least Dec. 9. Heavy downpours could trigger flooding in low-lying areas, as well as flash floods and ponding on road surfaces. The combination of strong winds and heavy snowfall could lead to hazardous driving conditions due to slippery roads and reduced visibility. As of late Dec. 6, Environment Canada has issued red (highest level on a three-tier scale) rainfall warnings across the affected area. Heavy rain of 2.5-4 cm (1-1.15 inches) is forecast over northern and central New Brunswick through early Dec. 8, while up to 5 cm (2 inches) of rain is likely over southeastern Quebec through the evening of Dec. 8. 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 or mountainous arbeas, especially where heavy rainfall has saturated the soil.
Transport
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. The disruptive weather could cause delays and cancellations at airports across the affected region. Flooding 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, 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.
Advice
Monitor local media for weather-related updates and advisories. Confirm all transport reservations and business arrangements before traveling in the affected area. Seek updated information on road conditions before driving or routing shipments through areas where severe weather is forecast; plan for possible supply chain disruptions throughout the affected areas. Stay away from elevated streams, creeks, and other watercourses that are prone to flash flooding. Do not attempt to navigate flooded roadways. Exercise caution in elevated terrain due to the threat of landslides, as well as mountainous regions where avalanches pose a threat. Charge battery-powered devices in the case of prolonged electricity outages.
