Atmospheric River Map Shows Potential US Impacts
Summary
An atmospheric river may cause stormy weather in parts of the western United States, including heavy rain and snow, from late October, according to the National Weather Service's Climate Prediction Center (CPC). The areas most likely to be affected include Washington, Oregon, and parts of northern California, with a risk of flooding and high winds.Key Facts
- An atmospheric river is expected to impact the western U.S. in late October.
- The CPC warns of potential heavy rainfall and flooding in Washington and Oregon.
- There is a 60-70% chance of above-normal precipitation in western Washington, western Oregon, and parts of northern California.
- Areas including eastern Washington, eastern Oregon, northwestern Nevada, and western Idaho may also see above-normal precipitation.
- There is a moderate risk of high winds along the coast of Washington and Oregon.
- The CPC notes a potential for heavy snow over the Cascades and some higher elevations.
- Atmospheric rivers are long bands of moisture that can bring significant rain or snow when reaching land.
- While powerful atmospheric rivers can cause major damage, most are less intense and can help water supplies.
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