California set for significant precipitation as atmospheric river develops

California set for significant precipitation as atmospheric river develops

An evolving storm system off the California coast, forecasted to develop into at least one atmospheric river, is set to deliver substantial rainfall and snowfall across the West Coast starting this weekend. With the Northeast Pacific Ocean as the stage, the interaction of several low-pressure systems is predicted to have significant impact, particularly from November 14 to 17, as per the Atmospheric River Reconnaissance field campaign.

Hilary becomes the fourth tropical storm or hurricane to reach California intact, brings record-breaking rains

Hilary becomes the fourth tropical storm or hurricane to reach California intact, brings record-breaking rains

Tropical Storm “Hilary” — previously a Category 4 hurricane — reached California on August 20, 2023, marking its position as one of the rare storms to maintain integrity upon reaching the state. The storm, with surface winds over 80 km/h (50 mph), brought with it record-breaking rainfall and caused widespread flooding and power outages across the region.

EF-1 tornado hits Montebello, California — the strongest tornado to impact Los Angeles Metro area since March 1983

EF-1 tornado hits Montebello, California — the strongest tornado to impact Los Angeles Metro area since March 1983

An EF-1 tornado hit the city of Montebello near Los Angeles, southern California on Wednesday, March 22, 2023, ripping roofs off buildings, throwing cars around, and injuring 1 person. This is the strongest tornado to impact the Los Angeles Metro area since March 1983, the National Weather Service (NWS) said. It is also the second tornado to hit California within 24 hours.

More than 700 000 people lost power, 5 killed as heavy rainfall and strong winds hit California, U.S.

More than 700 000 people lost power, 5 killed as heavy rainfall and strong winds hit California, U.S.

Southern California faces a barrage of extreme weather as record-breaking rainfall, powerful wind gusts, and widespread power outages impact the region. At least 5 people lost their lives. While the torrential downpour provides relief from the long-term drought, it brings additional challenges, including flooding, flight cancellations, and complications for communities in the mountains still recovering from recent snowstorms.

Almost 1 million Californians without power amid second atmospheric river impact in a week

Almost 1 million Californians without power amid second atmospheric river impact in a week

California is grappling with the effects of a second atmospheric river in just one week, as heavy rainfall and high-elevation snow continue to pummel the state on March 14, 2023. The National Weather Service (NWS) has warned of a high risk for excessive rainfall today, with the storm expected to persist into Wednesday, further exacerbating the potential for widespread flooding.

Another atmospheric river set to move across California, bringing heavy rain and snow

Another atmospheric river set to move across California, bringing heavy rain and snow

Just three days after a powerful atmospheric river (AR) event brought heavy rain to parts of California, leaving at least 2 people dead and nearly 10 000 under evacuation orders, another AR will reach the region late Monday, March 13, 2023, bringing more risk of flash flooding and heavy mountain snow through Wednesday.

Dangerous excessive rainfall event underway across much of Central California, widespread severe flooding expected

Dangerous excessive rainfall event underway across much of Central California, widespread severe flooding expected

A dangerous excessive rainfall event, brought by a powerful atmospheric river, is underway across much of Central California today. Areal rainfall totals of 100 – 230 mm (4 – 9 inches) through today, atop areas with saturated soil and deep snowpack are expected to cause widespread and severe flooding impacts, particularly in the High Risk area.

Atmospheric river to bring heavy precipitation, potential flooding to California

Atmospheric river to bring heavy precipitation, potential flooding to California

A new atmospheric river (AR) event is forecast to impact California on Thursday, March 9, 2023, bringing with it considerable rainfall through Saturday, March 11. Forecast models are predicting that the incoming AR will reach AR4 (on a scale of 1 – 5) ranking in the Bay Area, with an 80% chance of being at least an AR3. A second AR landfall is possible early next week.