US, Canada: Adverse winter weather forecast around the Great Lakes through at least Nov. 20 /update 2

Event

A heavy lake-effect snow event is underway across parts of the US and Canada around the Great Lakes and is likely to continue through at least Nov. 20. Northwesterly winds are expected to carry heavy snow accumulations downwind of the lakes, with accumulations of 60-120 cm (24-48 inches) possible east of Lakes Erie and Ontario, 50-80 cm (20-31 inches) around Lake Huron, and 20-30 cm (8-12 inches) around the other lakes. Heavy snow accompanied by strong winds will likely lead to hazardous driving conditions due to ice and snow accumulations on roads, as well as reduced visibility.

Authorities in Erie County, New York, have declared a state of emergency due to the severe snowfall amounts that have already fallen and are forecast to fall in the coming days. A travel ban was issued across the county late Nov. 17 and remains in place as of early Nov. 18, with the exception of some northern areas of the county that are now under a travel advisory. Schools in the county have been closed and many bus services and other public transport networks have been suspended. Amtrak stations in Buffalo, Niagara Falls, and Depew will be closed through at least Nov. 18.

Government Advisories
As of early Nov. 18, the National Weather Service (NWS) has issued lake effect snow warnings for parts of western and northern New York. Winter storm warnings have been issued over parts of far central, and southern Michigan and far northern Wisconsin. Winter storm watches have been issued for parts of northern New York, far northern Pennsylvania, and far northeastern Ohio. Winter weather advisories have been issued over parts of central, northern, and southern Michigan and northern Wisconsin.

Environment Canada has issued snow squall warnings and watches over parts of southern Ontario, as well as special weather advisories. Officials could update and possibly extend the coverage of weather alerts over the coming days.

Hazardous Conditions
Snow accumulations are likely across the affected area, especially at higher elevations. Lesser accumulations are possible where sleet and freezing rain mix with the snow and precipitation is less intense. In addition to the heavy snow, strong wind gusts will likely lead to periods of blowing and drifting snow in some areas. Blizzard conditions are possible. Sporadic power outages could occur throughout the affected area.

Transport
The winter weather will likely cause ground and air transport disruptions over the coming days. Traffic and commercial trucking delays are possible along regional highways. Dangerous and challenging driving conditions are also likely on secondary and rural roads in the affected states as maintenance crews prioritize clearing major routes. Authorities could close stretches of highways if driving conditions become too hazardous. Flight delays and cancellations are likely due to ground stops and deicing operations at regional airports.

Advice

Monitor local media for updated weather information. Verify road conditions before driving in areas where heavy snowfall is forecast. Allow extra time to reach destinations in these areas and carry an emergency kit and warm clothes if driving is necessary, especially on secondary or rural routes that could become impassable. If routing shipments by truck through the affected area, plan accordingly for delivery delays. Confirm flights. Charge battery-powered devices in the case of prolonged electricity outages.

Resources

National Weather Service
Weather Prediction Center
Environment Canada