Environment Canada has issued an Extreme Cold Warning for all of Nova Scotia. It states that on Friday, an arctic airmass will combine with strong northwest winds to give bitterly cold conditions.

“Windchill values of minus 35 to minus 42 are expected to develop Friday night and will persist into Saturday morning before beginning to moderate Saturday afternoon as winds subside.” says Environment Canada
“You should monitor for related symptoms: shortness of breath, chest pain, muscle pain and weakness, numbness and colour change in fingers and toes.”
You must cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill.
Environment Canada issues Extreme Cold Warnings when very cold temperatures or wind chill creates an elevated risk to health such as frost bite and hypothermia.
Information is provided on the Nova Scotia Department of Health and Wellness website.
