Terrace Bay – WEATHER – A Winter reset is heading into a more active stretch of winter weather along the North Shore of Lake Superior.

Conditions are relatively manageable early this evening, but cloud will increase overnight, and a Special Weather Statement for the Marathon–Schreiber area warning of accumulating snow (10–15 cm) and reduced visibility in blowing snow from Wednesday morning into Thursday morning is in effect. If you’re travelling Highway 17, Wednesday looks like the toughest window.

Current Conditions (Observed 6:00 PM EDT, Tuesday March 17)

• Temperature: -11.2°C

• Wind: SW 12 km/h

• Wind Chill: -17

• Pressure: 101.8 kPa, rising

• Humidity: 49%

• Dew Point: -19.7°C

• Condition: Not observed (at observation time)

Travel note for this evening

Road conditions can still be wintery even before the main system arrives. With temperatures below freezing, any light snow or packed areas can stay slippery. The bigger deterioration is expected overnight into Wednesday.

Special Weather Statement

Accumulating Snow and Reduced Visibility

• What: 10–15 cm snowfall possible (highest over higher terrain)

• Visibility: Reduced in snow and blowing snow

• Wind: Southwesterly gusts up to 50 km/h

• When: Wednesday morning to Thursday morning

• Impacts: “Quickly changing and deteriorating travel conditions.

Tonight (Tuesday Night)

• Sky: Increasing cloudiness

• Flurries: A few flurries before morning (local ~2 cm)

• Wind: Becoming SW 20 km/h overnight

• Low: -15°C

• Wind Chill: -15 this evening, dropping to -23 overnight

Tomorrow’s Forecast

Expected Conditions (Next Three Days)

Wednesday, March 18

• Snow: Flurries at times heavy

• Local blowing snow: Likely

• Snow amount: 5–10 cm (local)

• Wind: SW 30 km/h gusting to 50

• High: -3°C

• Wind Chill: -21 in the morning, -9 in the afternoon

• Travel impact: This is the day to expect visibility drops and drifting in open areas.

Wednesday Night

• A few flurries ending in the evening, then cloudy with 40% chance of flurries

• Wind: W 20 gusting 40, becoming light after midnight

• Low: -12°C

• Wind Chill: -16 overnight

Thursday, March 19

• Sky: A mix of sun and cloud

• High: 0°C

• Thursday Night: Periods of snow, low -7°C

Wardrobe Recommendations

• If travelling tonight: Dress for -15°C to -23 wind chills overnight—warm parka, mitts, toque, and a neck warmer.

• Wednesday (blowing snow day): Add a windproof outer layer and consider eye protection if you’ll be outdoors. Keep extra gloves and a blanket in the vehicle if you’re doing longer Highway 17 runs.

• Footwear: Traction matters—hard-packed snow can be slick, especially around parking lots, ramps, and walkways.

• Thursday near 0°C: Expect a more “damp-cold” feel and possible slush, then refreeze at night.

Weather Trivia

Blowing snow doesn’t need a blizzard-level snowfall total. When winds gust around 50 km/h, even moderate snowfall can produce sudden whiteout bursts—especially on exposed stretches of Highway 17 near the Lake Superior shoreline and higher elevations.