US, Canada: Adverse winter weather forecast over parts of the northeastern US and southeastern Canada through at least March 11 /update 1

Event

A winter storm system is forecast to bring adverse winter weather across parts of the northeastern US and southeastern Canada through at least March 11. The system is forecast to move eastward over the lower Great lakes March 10 and into the northern Mid-Atalntic late March 10 before weakening over northeastern Pennsylvania and Upstate New York early March 11. The storm is expected to bring heavy snow and strong winds across the affected region. Snowfall accumulations of more than 10-20 cm (4-8 inches) are possible across parts of the affected area. The combination of heavy snowfall and strong winds could lead to blizzard conditions in some areas. Hazardous driving conditions are likely across the affected area due to icy roads and reduced visibility caused by blowing snow.

Government Advisories
As of March 10, the US National Weather Service (NWS) has issued winter storm warnings for parts of eastern and southeastern Wisconsin, far northwestern and northeastern Pennsylvania, and far western New York. Winter weather advisories have been issued across the rest of the affected area.

Environment Canada has issued red snowfall warnings for the City of Hamilton and Niagra in southern Ontario, as well as weather advisories across other parts of southern Ontario.

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 are 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 possible 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