![]() The storm shattered multiple pressure records across parts of the Pacific Northwest. ![]() The system had severe impacts across Western North America, before dissipating on October 26. The bomb cyclone had a minimum central pressure of 942 millibars (27.8 inHg) at its peak, making it the most powerful cyclone recorded in the Northeast Pacific. The cyclone tapped into a large atmospheric river and underwent explosive intensification, becoming a bomb cyclone on October 24. The storm was the third and the most powerful cyclone in a series of powerful storms that struck the region within a week. The October 2021 Northeast Pacific bomb cyclone was an extremely powerful extratropical cyclone that struck the Western United States and Western Canada in late October 2021. This mild-mannered storm, in comparison to the coming storms, is slated to bring a general 0.50 of an inch to 2 inches of rain in the western portions of Washington, Oregon and Northern California with a few inches of snow above pass level in the Cascades and over the peaks in the Olympics.Part of the 2021–22 North American winter "The pattern unfolding this week to next week may be one of the biggest series of storms for the rainy season for California, but there is still potential for a couple of bigger storms over the winter," AccuWeather lead long-range forecaster Paul Pastelok said.Ī precursor to the stormy pattern will bring a batch of rain and high-country snow from British Columbia to part of Northern California and northern Idaho into Wednesday evening. The stormy pattern will bring rain and hazards to some communities along the West Coast, particularly in California, and it could be a bellwether of what's to come this winter. Large waves are likely to sweep southward along the coast of Southern California later this week to next week and are likely to be a boon to surfers, but large breakers and strong rip currents will pose dangers to bathers. The reasons include, but are not limited to, the risk that the water may be deeper than it appears, water may still be rising and road surfaces can wash away beneath floodwaters. As the rounds of rain soak the ground, the topsoil can become progressively unstable.įorecasters also warn motorists never to attempt to drive through flooded roads. People with homes built along the hillsides in recent burn scar locations will need to be extra vigilant with the stormy pattern unfolding into early next week. More than half of all of the rain in the week-long pattern and the majority of the high-country snow in California may fall during that single storm early next week. "Storms prior to the 'big one' early next week will prime the landscape and set the stage for quick runoff with the big storm carrying the potential for enough rain to cause widespread flash flooding and mudslides, especially in, but not limited to the burn scar areas in Northern California, Oregon and Washington," AccuWeather senior meteorologist Joe Lundberg said. The biggest storm in the bunch, in terms of rain and mountain snow, is forecast to roll ashore from Sunday to Tuesday and is likely to target California in general and bring soaking rain as far south as coastal areas in Southern California and spotty showers to some of the deserts. While all of the storms will have their benefits, one, in particular, may be especially problematic. The unfolding stormy pattern will knock temperatures down and may also effectively shut down the wildfire season in much of California, just as other storms earlier this autumn and late this summer have done in the coastal Northwest, DeSilva added. 12, 46% of California was in exceptional drought, the highest level of drought severity, according to data from the U.S. Significant drought caused several of California's critical reservoirs to reach historic lows this year.ĪccuWeather meteorologist Alex DeSilva said the storm has the potential to "be a tremendous shot in the arm due to the long-term drought in the region." As of Oct. ![]() The snow that accumulates in the mountains may provide bonus runoff into streams this fall or next spring, should snowpack remain in place through the winter. By the middle of next week, several yards of snow could pile up across the high country of the Sierra Nevada, Cascades and the Olympics. ![]() Snow will fall at varying elevations over the course of several days as each storm blows through. Through later next week, when the pattern will finally ease up, some west-facing slopes of the Coast Ranges and lower slopes of the Cascades and the Sierra Nevada are expected to pick up a general 6-12 inches of rain with locally higher amounts. As the pattern evolves and more storms spin southeastward across the Pacific, the rounds of rain and mountain snow will ramp up significantly.
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