Jan 24, 2024 · Atmospheric rivers (ARs) play important roles in various extreme weather events across the US. While AR features in western US have been extensively studied, there remains limited understanding of their variability in the eastern US (EUS).

The graphics below are designed to forecast the presence and strength of Atmospheric Rivers using data from the NCEP Global Forecast System (GFS), North American Mesoscale Forecast System (NAM), and Global Ensemble Forecast System (GEFS) models.

Where do atmospheric rivers occur? Atmospheric rivers typically occur in the extratropical North Pacific/Atlantic, southeastern Pacific, and South Atlantic oceans often making landfall on the west coasts of North and South America.

Oct 28, 2020 · A concerted observational campaign in the North Atlantic could help improve forecasts of atmospheric rivers and their impacts via a synthesis of advances in reconnaissance and numerical...

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 ...

Jan 30, 2025 · 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. They are the largest transport mechanisms of freshwater on Earth.

Dec 18, 2024 · Atmospheric rivers are primarily mid-latitude phenomena, generally occurring along the major storm tracks in the North Atlantic, North Pacific and Southern Ocean. They are most frequent in...

Atmospheric rivers (ARs) bring concentrated rainfall and flooding to the western United States (US) and are hypothesized to have supported sustained hydroclimatic changes in the past.

Feb 4, 2025 · The seasonal p B variability in the North Atlantic Ocean is characterized by alternating patterns of high and low anomalies across the subpolar, subtropical and tropical regions. The overall spatiotemporal pattern of these monthly anomalies is very similar to that derived from GRACE (Figures S3a–S3b Supporting Information S1 ).

Dec 2, 2021 · The sea surface temperature (SST)-forced and internal variability in cold-season (December–March) atmospheric river (AR) occurrence frequency during 1951–2010 over the North Atlantic (NA) basin are examined using a 30-member ensemble of high-resolution atmospheric simulations.