4 days ago · When an atmospheric river makes landfall, satellite observations are supplemented by additional data sources to provide a more complete assessment of their impacts. NOAA has developed atmospheric river observatories, which use ground-based instruments to measure key atmospheric variables like water vapor, snow levels, and wind profiles. When ...

2 days ago · A Pacific storm system is funneling an atmospheric river toward the Western United States, delivering heavy rain and snow. Atmospheric rivers are essentially moisture streams in the sky and...

Feb 3, 2025 · Revolutionize the physical understanding, observations, weather predictions, seasonal outlooks and climate projections of extreme events in Western North America, including atmospheric rivers, the North American summer monsoon and their impacts on floods, droughts, hydropower, ecosystems and the economy.

Dec 13, 2024 · A pair of storms and accompanying atmospheric river are set to deliver heavy rain, mountain snow and strong winds to the Western United States from Friday into Saturday. This weather...

Dec 4, 2019 · Atmospheric rivers (ARs) are extratropical storms that produce extreme precipitation on the west coasts of the world’s major landmasses. In the United States, ARs cause significant flooding, yet their economic impacts have not been quantified.

Dec 16, 2024 · A "series" of atmospheric rivers is set to bring significant precipitation and turbulent weather to the western United States this week, according to the National Weather Service (NWS).

Feb 1, 2024 · Atmospheric rivers provide an average of 30% to 50% of the West Coast’s annual precipitation. They also contribute to the snowpack, which provides a significant portion of California’s year-round...

Jan 25, 2023 · From late Dec. 2022 into Jan. 2023, a series of nine “atmospheric rivers” dumped a record amount of rain and mountain snow across the western U.S. and Canada, hitting California particularly hard. More than 32 trillion gallons of water rained down across the state alone, and the moisture also pushed into much of the Intermountain West.

Jun 20, 2023 · Precipitation & tree-ring based data in the Western US can be used to reconstruct atmospheric river (AR) activity along the US west coast. Reconstructions show 2–8 and 10–20-year modes of low-frequency variability in AR landfalls at locations across the coastline

Jan 30, 2025 · NASA’s Earth-observing satellites help scientists identify atmospheric rivers, which enables studies of climate change, water management, and weather. Atmospheric rivers are narrow, elongated corridors of concentrated moisture transport that occur in the lower atmosphere, ahead of the cold front in an extratropical cyclone.