Washington state is currently facing one of the most extreme weather emergencies in decades as a supercharged Atmospheric river unloads relentless rainfall. Thus, these conditions have forced mass evacuation, triggered landscape and pushed the river to record-breaking flood levels. However, the authorities have warned that the dangerous conditions might worsen before improving, as around 5 trillion gallons of rain have soaked into the region in only 7 days.
What Is Happening in Washington?
According to the Seattle Times, an unusually powerful atmospheric river has drenched Washington State due to warm Pacific water and an unusual weather pattern. However, meteorologists are also calling it a jet stream of moisture.
Meteorologists revealed that this atmospheric river stretches more than 3,5000 miles, as it carries moisture from near Hawaiʻi and even from weather disturbances near Indonesia. Moreover, experts state that a chain of events beginning with tropical cyclone flooding in Indonesia has amplified the system dramatically.
As we mentioned above, rainfall is the primary cause of this flood. So, you should read the details related to the intensity of rainfall below:
- Nearly 5 trillion gallons of rain fell over the past week.
- Mount Rainier has recorded 21 inches of rainfall since Thursday.
- The three-week rainfall total could reach 20–30 inches, an extreme amount for the region.
The Skagit and Snohomish rivers are the biggest concerns as they are forecast to crest many feet above the last records.
Thousands Evacuated as Rivers Rise
According to CBS News, residents in Western Washington are scrambling to evacuate as the river overflows and floodwaters threaten homes, businesses, and infrastructure. Here are the details about the key affected areas:
- Mount Vernon: Mandatory evacuations for all floodplain residents.
- Pierce County (Orting): Rescues from RV parks amid waist-deep water.
- Index & Snohomish County: Skykomish River rising dangerously.
- Sumas (US–Canada border): Flood sirens activated; crossings restricted.
Washington Governor Bob Ferguson has declared a nationwide emergency. In addition, the Governor has activated the National Guard and requested further assistance. Moreover, up to 100,000 residents might face evacuation orders.
Infrastructure Damage and Road Closures
Flooding and landslides have severely impacted the transportation network of Washington. Below are the highlights pg the impact of this condition:
- A landslide blocked a section of Interstate 90, trapping vehicles.
- U.S. Route 2 is closed due to rocks and mudslides.
- Firefighters rescued multiple motorists attempting to cross flooded roads.
- Older levee systems across Skagit County are under pressure and may fail.
Local businesses, homeowners, and farmers are racing to protect properties through sandbags, water pumps, and emergency barriers.
Why This Atmospheric River Is So Extreme
Experts have attributed the Washington flood severity to a rare combination of factors. Below is the list of those factors:
1. Warm Pacific Ocean Temperatures
Sea temperatures near Hawaiʻi are several degrees above normal, which has added energy and moisture.
2. Madden–Julian Oscillation
A strong MJO phase over Indonesia has sent energy across the Pacific, which has fed the atmospheric river. However, the phase is one of the strongest in decades.
3. Climate Change Influence
Climate scientists have shared the following reasons behind the change:
- Heavy rainfall is now 4–10 times more likely due to warmer oceans and air.
- Atmospheric rivers have become bigger, wetter, and more frequent since 1980.
- More rain is falling instead of snow, which has increased flood risks.
What’s Next?
Meteorologists have warned that the moisture (fire horse) aimed at Washington might continue until the week of Christmas. Moreover, there is another storm system expected on Sunday. Thus, authorities have requested to follow the following tips:
- Follow evacuation orders promptly
- Avoid driving through flooded roads
- Stay alert for landslides in steep regions
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