Severe 'Bomb Cyclone' Expected to Hit US Northwest, Impacting Millions

Mon Dec 23 2024 05:36:22 GMT+0200 (Eastern European Standard Time)
Severe 'Bomb Cyclone' Expected to Hit US Northwest, Impacting Millions

A significant weather event is poised to affect over seven million residents in the Pacific Northwest, bringing heavy rains, snow, and strong winds.


The National Oceanic and Atmospheric Administration (NOAA) warns of a powerful bomb cyclone poised to strike the US Northwest, potentially leading to dangerous conditions including flash flooding, heavy snow, and power outages. This phenomenon arises from rapidly dropping air pressure and presents risks of severe weather that could impact travel and infrastructure.


A formidable storm system known as a bomb cyclone is set to unleash its fury on the US Northwest, affecting over seven million residents across states such as Washington and Oregon. Starting to impact the region on Tuesday, the National Oceanic and Atmospheric Administration (NOAA) has predicted that conditions will deteriorate through the end of the week, with a mix of high winds, significant rainfall, and heavy snowfall.

The storm, dubbed a "bomb cyclone," is characterized by a rapid drop in air pressure, which intensifies the weather conditions significantly. Past instances of such storms, including one that hit California in March 2023, underline the potential severity of this weather event. With strong winds already being felt in the Seattle area, NOAA's weather prediction center forecasts heavy, wet snowfall in the mountain ranges, anticipating accumulation rates of 2-3 inches (5-8 cm) each hour, paired with wind gusts reaching up to 65 mph (29 mps). This combination is likely to create hazardous travel conditions, particularly with projected snowfall in some areas exceeding 10-20 inches (25-50 cm).

Residents are warned to prepare for possible power outages as high wind gusts may bring down trees, coupled with severe surf along the coastline. High-risk excessive rainfall outlooks have been issued, with northern California and southwestern Oregon bracing for the brunt of potential mudslides and flooding. The National Weather Service has already issued winter weather alerts and storm warnings, indicating widespread disruptions, including hazardous travel conditions, potential flash floods, and significant tree damage.

The term "bomb cyclone" refers to a weather system that intensifies rapidly, defined by a drop of at least 24 millibars in central air pressure within 24 hours. These storms are known for delivering an array of severe weather conditions, including blizzards and thunderstorms. Meteorologists highlight that while such atmospheric river events are common during this season, the combination with a bomb cyclone can lead to unprecedented weather anomalies. As the storm approaches, residents are urged to stay informed and prepare for potential impacts, especially those living in vulnerable areas.

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