What Exactly Is an Atmospheric River? Think of atmospheric rivers as narrow regions in the atmosphere that transport water vapor, with the average one carrying an amount roughly equivalent to the ...

There's something almost cruelly ironic about watching a city flood while its wells run dry. Streets underwater. Cars submerged. Emergency alerts pinging every phone in the county. Yet just a few ...

Atmospheric rivers carry unfathomable amounts of water across the sky, bringing moisture to drought-stricken regions like the Western U.S. But whether a particular incoming atmospheric river storm ...

After recovering from record-setting flooding, many in King County are wondering why December’s flooding has been more extreme and if climate change is to blame. The primary cause of the flooding was ...

The study’s modified atmospheric river (AR) scale with changes to the x-axis that incorporate soil saturation levels (SSPI). The y-axis represents maximum integrated water vapor magnitude. From Figure ...

When a series of back-to-back atmospheric rivers hammered the West Coast in December 2025, the storms killed at least five people, triggered devastating flooding across every western state and forced ...