By Vinod Ram 
A powerful winter weather system dubbed the “Pacific Hammer” is set to slam the U.S. West Coast, prompting the National Oceanic and Atmospheric Administration (NOAA) to issue a rare “high risk” warning for extreme precipitation and heavy mountain snow starting February 17.
What Is the “Pacific Hammer” Storm?
Meteorologists describe the Pacific Hammer as an unusually strong atmospheric river — a long, narrow band of moisture stretching across the Pacific Ocean. According to the National Weather Service, this system is expected to deliver intense rainfall at lower elevations and feet of snow in higher mountain regions.
Unlike typical winter storms, the Pacific Hammer carries warmer air aloft and colder air near the surface, creating ideal conditions for extreme snowfall in the Sierra Nevada and Cascade ranges.
Why California and Oregon Are on High Alert
State emergency agencies in California and Oregon are already preparing for dangerous travel conditions, power outages, and potential flooding. The California Department of Transportation (Caltrans) has warned that multiple mountain passes could face closures due to whiteout conditions.
Similarly, the Oregon Department of Transportation (ODOT) is urging residents to avoid unnecessary travel, especially through the Cascades.
Snowfall Totals Could Break Records
Forecast models cited by AccuWeather suggest:
- Up to 6 feet of snow in parts of the Sierra Nevada
- More than 4 feet across Oregon’s Cascade Mountains
- Rainfall totals exceeding 10 inches in coastal regions
Flooding and Avalanche Risks Rising
With saturated ground from earlier storms, forecasters at The Weather Channel warn that flooding, mudslides, and avalanches are serious concerns. Rapid snow accumulation combined with strong winds may also lead to blizzard-like conditions.
How Residents Should Prepare
Emergency officials recommend taking the following precautions:
- Avoid mountain travel during peak storm days
- Prepare emergency kits with food, water, and medications
- Monitor official alerts from NOAA and local authorities
- Ensure vehicles are equipped with chains or snow tires
Why This Storm Matters Beyond the West Coast
The Pacific Hammer highlights a growing trend toward more intense winter storms driven by climate variability. Scientists say these extreme weather events can strain infrastructure, disrupt supply chains, and increase insurance and disaster recovery costs nationwide.
As February unfolds, forecasters caution that this may not be the last major storm of the season.
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