All the ingredients are coming together for a formidable storm to develop west of Vancouver Island late on Tuesday. This low-pressure system could qualify as a bomb cyclone.
This system has some similarities with the historic low that hit the Pacific Northwest in October 2021. This particular storm will remain offshore and spare folks on land from its worst impacts, but it’s still going to be an intense one for the region.
Expect high winds Tuesday into Wednesday, which could lead to power outages and ferry delays. Heavy precipitation is also possible for some locations.
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The energy that’ll kick off our upcoming storm spent the first half of this weekend traversing the Bering Sea. By Monday, we’ll see this feature move into the Gulf of Alaska filled with modified Arctic air.
A strong jet stream aloft and sharp temperature differences will work together to rapidly intensify a low-pressure system off the B.C. coast by Tuesday.
The minimum central pressure within this low could drop from 1004 mb on Monday evening down to 948 mb by Tuesday evening—a stunning 56 mb drop over the course of a single day.
This would double the criteria for bombogenesis, the formal name for the rapid intensification that leads to a bomb cyclone.
A bomb cyclone is different from other storms because the dynamics within a rapidly intensifying storm can create ripping winds and extreme precipitation rates.
Light shower activity to begin Tuesday will give way to increasing southeasterly winds through the afternoon and evening hours.
Heavy alpine snow will develop as this system approaches the region. All local ski resorts are in line for copious amounts of snow as freezing levels fall below 1000 m on Tuesday. Some areas could see up to 100 cm of snow from this event.
It’s the winds, though, that are likely to cause the greatest impacts as this system nears the region.
Winds will intensify into Tuesday night up and down the Strait of Georgia and throughout coastal Vancouver Island. Gusts will generally peak around 90-100 km/h, but it’s possible that these numbers could trend higher as models get a better read on the storm.
Folks across the Lower Mainland can expect winds to peak around 50-70 km/h, with the strongest gusts likely along the western beaches.
This is going to be a long-duration wind event, so ferry delays and cancellations will spill into the day Wednesday.
Widespread power outages are possible as a result of the high winds. Make sure you’re prepared in case the electricity goes out in your area.
Rainfall totals through Wednesday could exceed 100 mm near Tofino and western Vancouver Island, with 30-50 mm of rain for most other regions along the South Coast.
Storm surge flooding may also be a concern for some locations. We’re just coming off a king tide cycle on Tuesday and Wednesday, so tides will be elevated right as the storm peaks. Some coastal inundation is possible Wednesday morning around communities like Victoria and Campbell River.
Stay with The Weather Network for all the latest on conditions across B.C.
