THUNDER BAY – WEATHER – Thunder Bay is under a winter weather advisory today, as an Alberta Clipper sweeps into the region, bringing significant snowfall and hazardous travel conditions.
Motorists should exercise caution and adjust travel plans to avoid the most severe impacts.
Current Conditions (5:00 AM EST, December 3, 2024):
Thunder Bay is experiencing cloudy skies with a temperature of -7.8°C. Winds are light at 7 km/h from the west-southwest, resulting in a wind chill of -11°C. Humidity is at 75%, with visibility at 24 km.
The barometric pressure is 103.0 kPa and falling, indicating the approach of the storm system.
Weather Advisory Details
- Hazards: Locally heavy snowfall of up to 10 cm and reduced visibility in heavy snow.
- Timing: Snow will begin this afternoon and taper off overnight.
- Impacts: Roads, highways, and walkways may become slippery and challenging to navigate due to snow accumulation. Visibility will be reduced during periods of heavy snow.
Forecast for December 3, 2024 (Today):
Mainly cloudy skies will give way to snow starting this afternoon, with 5 cm of accumulation expected by evening. Winds will remain light, reaching up to 15 km/h. The high temperature will be -4°C, with wind chills making it feel like -16°C in the morning and -7°C in the afternoon. The UV index is low at 1.
Tonight: Snow will continue, with another 5 cm expected before tapering off overnight. Winds will shift to the west, increasing to 20 km/h before morning. Temperatures will drop to -7°C, with wind chills near -14°C overnight.
Forecast for December 4, 2024 (Wednesday):
The day will remain mainly cloudy with a 60% chance of flurries. Winds will be from the northwest at 30 km/h in the afternoon, creating blustery conditions. The high will be -6°C, but wind chills will make it feel like -12°C in the morning and a frigid -20°C by the afternoon.
Wednesday Night: Cloudy periods with a 30% chance of flurries. Temperatures will fall to -14°C.
Forecast for December 5, 2024 (Thursday):
Sunny skies will brighten the day, though temperatures will remain cold with a high of -7°C.
Thursday Night: Cloudy periods will dominate, with temperatures falling to -16°C.
What is an Alberta Clipper?
If you live in Northwestern Ontario, you’ve likely heard the term “Alberta Clipper” during winter weather forecasts. But what exactly is it?
Essentially, an Alberta Clipper is a fast-moving low-pressure system that originates in or near Alberta, Canada. These systems typically track southeastward across Canada and the northern United States, bringing with them a quick burst of snow and a sharp drop in temperature.
Why “Clipper”?
The name comes from the clipper ships of the 19th century, known for their speed and agility. Like these ships, Alberta Clippers move quickly, often crossing the continent in just a few days.
What to Expect:
- Light to moderate snowfall: Alberta Clippers usually don’t dump massive amounts of snow, but they can still bring several inches of accumulation.
- Strong winds: Winds can be gusty, causing blowing snow and reduced visibility.
- Cold temperatures: One of the hallmarks of an Alberta Clipper is the blast of Arctic air that follows in its wake. Temperatures can plummet significantly after a Clipper passes through.
Impacts:
While Alberta Clippers are generally not as intense as other winter storms, they can still cause disruptions:
- Travel delays: Snow and wind can make driving conditions hazardous.
- School closures: Schools may close due to poor weather.
- Power outages: Strong winds can bring down trees and power lines.
Stay Informed:
It’s important to stay informed about weather conditions during the winter months. Pay attention to forecasts and be prepared for sudden changes in the weather. If an Alberta Clipper is headed your way, take precautions and adjust your travel plans accordingly.
Wardrobe Suggestions
Dress warmly and in layers to combat the significant wind chill and heavy snow today and tomorrow. Insulated coats, waterproof boots, gloves, and scarves are essential, especially for those venturing outdoors during snowfall. Reflective gear is recommended for visibility in reduced conditions.
Travel Advisory Recommendations
Motorists should plan for potentially hazardous driving conditions today and tonight, particularly during the heaviest snowfall in the afternoon and evening. Visibility will be significantly reduced at times, and untreated surfaces may become slippery. Ensure vehicles are equipped with winter tires and carry emergency supplies in case of delays.
Winter Driving: Be Prepared, Stay Safe
Winter driving in Northwestern Ontario can be unpredictable. Blizzards, freezing rain, and icy roads are all possibilities, so it’s crucial to be prepared for anything. Here’s a checklist of essential items to keep in your vehicle this winter:
For Winter Weather:
- Snow brush and ice scraper: Essential for clearing snow and ice from your vehicle before you hit the road.
- Shovel: A small, collapsible shovel can help you dig out if you get stuck.
- Warm clothing and blankets: Pack extra layers, hats, gloves, and blankets to stay warm in case of a breakdown or delay.
- Booster cables: Dead batteries are common in cold weather.
- First-aid kit: Always a good idea to have on hand.
- Flashlight with extra batteries: Essential for visibility in low-light conditions.
- Non-perishable food and water: Pack snacks and water in case you get stranded.
- Kitty litter or sand: Provides traction if you get stuck on ice.
- Windshield washer fluid: Make sure it’s rated for sub-zero temperatures.
Especially for Snowy Conditions:
- Tow rope or chain: Helpful if you need to be pulled out of a snowbank.
- Traction mats: Provide extra grip on snow and ice.
- Emergency flares or reflectors: Alert other drivers to your presence if you’re stopped on the side of the road.
- Cell phone charger: Keep your phone charged in case you need to call for help.
Don’t Forget:
- Winter tires: Provide superior traction on snow and ice compared to all-season tires.
- Full tank of gas: Avoid running low on fuel, especially in remote areas.
- Check road conditions: Before heading out, check 511on.ca for road closures and updates.
By taking these precautions, you can help ensure a safe and comfortable driving experience this winter.
Weather Trivia
Thunder Bay’s winter storms, like this Alberta Clipper, are common during December. These fast-moving systems often bring bursts of heavy snow and sharp temperature drops, making them a hallmark of the region’s early winter.
