Significant Winter Storm Targets Eastern/Central/Southern Newfoundland Tonight into Tuesday
TL;DR
❄️ Heavy snow arrives late this evening across eastern Newfoundland
⚠️ Avalon & Burin: Snow → ice pellets/freezing rain → rain Tuesday
🌨️ 30–50 cm possible in mamny areas before changeover
💨 Winds gusting near or over 100 km/h Tuesday evening (northeast coast)
⚡ Thundersnow possible on the Avalon early Tuesday morning
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After a relatively quiet and comfortable day across much of Newfoundland and Labrador, a potent winter storm is set to move in tonight, bringing a mix of heavy snow, ice, rain, and wind through Tuesday. This is a high-impact system, particularly for eastern Newfoundland, and it’s going to make for a messy stretch of weather over the next 24 to 36 hours.
Environment and Climate Change Canada has issued Orange-level Winter Storm Warnings for the Avalon Peninsula, along with Yellow-level warnings for much of central, eastern, and southern Newfoundland. While the entire Island will see some effects from this system, the eastern two-thirds will take the brunt of it.
For the Avalon and Burin Peninsulas, snow will begin later this evening, likely between 9 and 11 PM. From there, conditions will deteriorate quickly overnight. The heaviest snowfall is expected between midnight and about 8 or 9 AM Tuesday, and this is where things could get intense. Snowfall rates of 4 to 5 cm per hour are possible, and there’s even a chance those rates are exceeded for a time.
That kind of intensity over several hours can add up quickly. It’s entirely possible that parts of the Avalon pick up close to 30 cm of snow in a relatively short window before any changeover occurs. After about 9 AM, we’ll start to see a transition to ice pellets and freezing rain, followed by rain around midday. By mid to late afternoon, most of the precipitation in eastern areas will taper off.
Further north and west, including central and northeastern Newfoundland, the snow arrives later but sticks around longer. These areas will see snow through much of the day Tuesday and into Tuesday night before things wind down. The heaviest snow in these regions looks likely from around Terra Nova through Gander and into parts of the Bonavista Peninsula. Unlike the Avalon, most of this will fall as snow, making for a more straightforward forecast, but still a significant one.
Across western Newfoundland and the Northern Peninsula, snowfall will be lighter overall. These areas will still see some accumulation, but nothing compared to what’s expected farther east.
This is a complex system, and not all snow is created equal. In eastern areas, the snow will be heavy and wet due to the higher moisture content and eventual mixing. In central and northeastern regions, the snow will be fluffier, meaning you can still see similar totals with less overall moisture. In general, eastern areas may see totals in the 30 to 50 cm range, while central areas could see 20 to 40 cm. Amounts drop off fairly quickly as you head west.
Travel is likely to become difficult to impossible at times, especially Tuesday morning. With snowfall rates that high, there’s a strong chance that road crews won’t be able to keep up, and roads across eastern Newfoundland — particularly on the Avalon — could become impassable for a time. If you need to be somewhere Tuesday morning, your best bet is to either go tonight or wait until conditions improve later in the day.
Another factor here is the changeover. Snow followed by ice pellets, freezing rain, and then rain creates a very heavy snowpack in a short period of time. That’s something you’ll want to stay ahead of if possible, because once it gets saturated, it becomes much harder to deal with.
Winds will also increase as the system moves through. Gusts of 60 to 80 km/h are expected through the day Tuesday for many areas. As the low pulls away Tuesday evening, winds will ramp up further along the northeast coast, particularly around Bonavista Bay and Fogo Island, where gusts near or over 100 km/h are possible. Some parts of the Avalon may even see a brief lull in the wind as the center of the low passes overhead before those winds pick back up again.
One interesting aspect of this system is the potential for thundersnow on the Avalon Tuesday morning. With strong lift and very intense snowfall rates near the rain-snow line, there is a window — roughly between 4 and 7 AM — where lightning and thunder are possible. It’s not a guarantee, but the setup is certainly there, and it’s something I’ll be watching closely.
Once the system moves out, conditions will improve fairly quickly. Wednesday looks quieter, although there will still be plenty of cleanup to do in areas that get hit hardest. Another system may approach Thursday into Friday, but at this point it looks milder and less impactful in terms of snowfall. By the weekend, colder air returns.
All in all, this is a fast-moving but impactful winter storm, especially for eastern Newfoundland. The combination of heavy snowfall, a rapid changeover to ice and rain, and strong winds will create challenging conditions, particularly during the morning hours on Tuesday.
I’ll be live early Tuesday morning — likely before 6 AM — tracking this as it unfolds and helping you navigate it in real time.
Stay safe, and be ready for a shovel alert in the morning.
I’ll have my next update posted tomorrow morning!
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