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Atmospheric River Event on the West Coast; 4th Nor'easter on the East Coast

Very heavy rainfall event is developing in California, especially, Southern California over the next few days. Several inches of rain may lead to flash flooding, including mud and debris flows from burn scar areas. Several feet up to 5 feet is expected in the mountains. On the east coast, the 4th Nor'easter in 3 weeks will bring another round of heavy snow, gusty winds, and coastal flooding. Read More >

The National Weather Service is developing a new web page for the Atlantic hurricane basin which will interactively display and communicate local tropical storm and hurricane decision-making information based upon on local forecast databases, local statements, and hurricane threats and impact grids.

Users are reminded that tropical cyclone threat grids (wind, flooding rain, storm surge, and tornadoes) became operational on June 1, 2015 in the National Digital Forecast Database (NDFD). The grids are available at: Further information on these grids can be found at:

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