National Weather Service United States Department of Commerce

Coastal Storm Impacting the Northeast U.S.; Severe Thunderstorms in the Plains

A coastal storm will continue to bring high winds and heavy rain which may cause flooding to coastal areas of the Northeast U.S. Tuesday and Tuesday night. Scattered severe thunderstorms associated with large hail, wind damage and isolated tornadoes are expected across parts of the southern and central Plains from late Tuesday afternoon through the evening into the overnight. Read More >

Click a location below for detailed forecast.

Last Map Update: Tue, Oct. 26, 2021 at 5:01:29 am PDT

National Weather Service Eureka, CANational Weather Service Sacramento, CANational Weather Service Reno, NV

National Weather Service San Joaquin Valley, CA
National Weather Service Honolulu, HINational Weather Service Los Angeles, CA

A very strong atmospheric river storm system will move through the region late this weekend into early next week. Very large, long period swell is expected to be generated from this storm as it passes. This wave energy will then transition through the coastal waters from late Sunday into Tuesday, and peak on Monday. Swell of 16 to 24 feet at 16 to 18 seconds is forecast to arrive with the largest swell train as it peaks on Monday and result in a number of coastal hazards. These hazards include large breaking waves of 20 to 30 feet (higher at favored break points), increased risk of strong longshore and rip currents, increased risk of coastal erosion and minor coastal flooding, and enhanced coastal run up concerns due to the summer beach profiles in place. Due to the early arrival of these large waves, many beaches are still transitioning from their summer beach profiles and lack the features and steepness to resist larger wave run up on coasts. This means that more of this wave energy will have a chance to move onto the beach and overtake individuals, potentially injuring them, or pulling them into the cold ocean. Each year, people die at the coast due to these or similar ocean conditions. A high surf warning for the entire coast has been issued for this threat and is in effect from 11PM Sunday to 11AM Tuesday, with the highest risks once again at west to northwest facing beaches.
Un rio atmosférico continuara su camino por nuestra region durante la primera parte de esta semana. Un oleaje fuerte se espera debido al sistema. El riesgo incluye olas de 20 a 30 pies (olas mas altas serán posibles). Debido a estas condiciones, el aviso estará en efecto hasta el martes a las 11AM, con un riesgo elevado para las playas que están orientadas al oeste/noroeste.


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