![]() Low pressure is associated with clouds and precipitation, and the lower the pressure, the stronger the storm. The term “bombogenesis” refers to the process during which a midlatitude cyclone rapidly intensifies, dropping at least 24 millibars - a measure of barometric pressure - over 24 hours, creating what is known as a “bomb cyclone.” This can happen when a cold air mass collides with a warmer air mass, often over warmer ocean water. It will bring rain, mountain snow and cold temperatures to Southern California on Wednesday and Thursday. Pacific Northwest windstorms, sometimes colloquially known as Big Blows, are extratropical cyclones which form in the Pacific basin, and affect land areas in the Pacific Northwest of the United States and British Columbia, Canada. What everyone can agree on is that a powerful, cold, low-pressure system packing strong winds will continue to deepen through Tuesday night as it moves down the West Coast. We prefer to shy away from sensational terminology because it doesn’t illuminate what’s really happening.” “We’re not ready to call it a bomb cyclone. “That’s a little too sensational,” said Hoxsie, who prefers to simply call the system a deep low. This is closely associated with a rapidly. News organizations, commercial weather forecasters and numerous people on social media have been calling the storm approaching California this week a “bomb cyclone,” but Kathy Hoxsie, a meteorologist at the National Weather Service office in Oxnard, is uncomfortable with that name. A bomb cyclone is defined as an area of low-pressure where the pressure in the storm rapidly decreases losing 24 millibars in a 24-hour period. Please look at the time stamp on the story to see when it was last updated. ![]() It almost looks like it appeared out of nowhere Fortunately, we have the ability to both understand and track the underlying meteorology, leading to high-confidence predictions of where the cyclone will end up. ![]() It’s always best with these situations to prepare for the worst and hope for the best.This is an archived article and the information in the article may be outdated. Just 12 hours later, a deep cyclone with minimum pressure around 960 hPa will be off the coast of Washington/Oregon. While we won’t see the destruction of the Big Blow, we still need to brace ourselves for an intense weekend of angry weather. The west coast and northern areas will receive the stronger gusts. Rainfall numbers through the weekend are in the 50- to 100-millimetre range on Vancouver Island and if we take Thursday’s storm as a template, wind gusts will hit the triple digits in a few areas. No matter where it lands, wind will be the biggest factor with rain being less of a concern.ĭon’t get me wrong, a good amount of rain will fall but here on the island our numbers won’t match what they’ll see in Northern California, with a possible 300 millimetres hitting the area, which in turn could create massive flooding and mudslides. ![]() We still have to wait it out when it comes to the finer details as things change quickly. Sunday though Monday morning will be the timeframe we’re dealing with this next big storm. There’s a good chance it moves in south of Vancouver Island and impacts Washington state more than us but we could also see a shift north where the west coast and northern areas of the island are the most impacted. The problem this system is currently presents is not only how low that pressure will go but the path of where this storm is heading.Īs the storm hits land, it will weaken but the location of the most intense features are still up in the air, literally. The huge amount of subtropical moisture and a fast moving polar jetstream, rolling at approximately 400 km/h, along with some strong troughing near Vancouver Island are all combining to make this a possible record-breaking bomb cyclone. We’re being fed lots of energy from the Bering Sea, which is typical. There are a few factors helping to make this system a monster. It will be another bomb cyclone but stronger than the one we just dealt with on Thursday. The storm we’re waiting for on Sunday could potentially have pressure as low as 944 hPa, according to some models. The lowest pressure recorded during the Big Blow was 960-958 hPa or millibars of pressure. While the storm did weaken as it moved north into British Columbia, the peak wind gusts were still 140 km/h, caused $80 million dollars in damage and killed five people. The winds associated with this storm were in excess of 230 km/h at its peak. The storm was one of the most powerful extratropical cyclones ever recorded. When it hit the West Coast it had a massive impact. The Big Blow, or as it’s known to our American friends, the Columbus Day Storm of 1962, was originally Typhoon Freda. That date has been referenced a lot this past week on social media as we prepare for a possible record-breaking low-pressure system for the Pacific Northwest. To help you with your answer we have to travel back to Oct.
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