There’s a large high pressure system just to the northwest of Lake Winnipeg in central Saskatchewan. This brings in a light northwest flow at 5-10mph with arctic air filtering down throughout the night. Skies should be clear to mostly clear throughout the night. Lows are going to be right around -10, with some places around the South Shore close to -4. The Iron Range and Borderland will have lows near -20. With such cold temps and some slight wind we will have a wind chill of around -35, frostbite can occur in under 10 minutes on exposed skin with these conditions. There’s a wind chill advisory north of Carlton County from midnight until noon Friday.
Our huge high moves south and east over Lake Winnipeg on Friday. This keeps us sunny to mostly sunny for all places excluding folks around the South Shore. Ashland, Ironwood, and Mercer will have partly cloudy to mostly cloudy skies as the north wind at 4-8mph will yield clouds from the lake. High temps will be in the single digits with some low single digits in Aitkin, Duluth, Grand Rapids, and Silver Bay. Expect upper single digits in Mercer, Spooner, Siren, Hayward, Ironwood, and Hinckley. The Iron Range and Borderland will be below zero.
SUNNY & COLD DAY:
Saturday the high pressure system pushes south over the region and calms our winds and brings even more arctic air. Expect lows down to -15. I’m not expecting our highs to reach above zero on Saturday as there’s plenty of sun with calm winds.
SOUTH SHORE LAKE EFFECT:
Sunday morning the high sits just to our north. This keeps the arctic air in place and lows reach -18, coldest night of the season. The South Shore could see some lake effect snow showers with a light northern flow. By the afternoon expect partly cloudy skies and highs near 1.
Martin Luther King Jr. Day will have cloudy skies as warmer air comes in from the southwest. The chance of snow has gone up to a 50% shot by the late afternoon/evening. The snow lasts overnight into Tuesday morning as the front hangs over the region. The parent low pressure system is in the panhandle area of Oklahoma. So the low is pretty far away. But we’ve got so much southern flow and warmth coming in that it warrants the increased chance of snow.
The low moves east on Tuesday and takes the snow from west to east throughout the morning hours. Low temps are down to 11 and highs reach 16 by the afternoon. Chances of morning snow is around 40%. It’s still too early to talk about how much snow, but it would be a snowfall that would require a shovel.