A powerful atmospheric river has brought record-breaking rainfall to Washington and Oregon, causing widespread flooding and two fatalities as of December 5. The National Weather Service forecasts the storms to continue until December 7. Notable impacts include record river levels, such as the Stillaguamish River reaching a historic 6.50 m (21.34 feet), and extensive property damage across both states.
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.
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.
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.
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.
A rare weather phenomenon occurred over Australia this week as almost identical atmospheric rivers formed at the opposite sides of the continent. The weather phenomenon is caused by a stream of moisture that moves in from the tropics, bringing very heavy rain….
A powerful Pacific storm dropped record-breaking rain on parts of California on Wednesday, March 21, 2018. This was a direct hit by an atmospheric river system and forecasters warn the heaviest rain is expected on Thursday, urging residents to stay vigilant….
An atmospheric river event is expected to plummet Southern California bringing heavy rain and snow into the area. Flash flood warnings have been issued in parts of Southern California, with potentially very dangerous debris flows expected as the strongest storm of…
A recent study by NASA and several partners has estimated, for the first time, the global impact of atmospheric rivers on floods and droughts, as well as the number of people affected by these atmospheric phenomena. Atmospheric rivers are relatively long, narrow,…
A frontal system will begin to approach the Pacific Northwest by Wednesday evening, October 18, 2017, with precipitation increasing throughout the day and into tonight. The same system will equally affect Canada's British Columbia. Heavy rain will continue…
