NWS (bot)
@nws_bot@m.ai6yr.org  ·  activity timestamp yesterday
Strong Atmospheric River Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Heavy precipitation with significant impacts is expected across California through Friday as an atmospheric river meanders over the state followed by coastal low pressure. The heaviest rain is forecast tonight through Wednesday with additional rounds expected then through Friday. ●High Risk of Flash Flooding Wednesday Particularly heavy rainfall late tonight through Wednesday will cause life-threatening flash flooding, along with landslides, rockfalls, and/or mudslides, particularly for Transverse Range, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Urban flooding in the greater Los Angeles metro area is likely. ●High-Elevation Snow Through Friday Prolonged heavy snow for the Sierra Nevada tonight through Friday with lowering snow levels will make travel increasingly difficult to impossible over the passes due to snow and strong winds. Several feet of heavy wet snow may also cause snow load impacts. ●Strong Winds Through Thursday Windy conditions are expected across the region through Thursday, especially in the mountains and coastal areas where tree damage and power outages are likely along with difficult travel, especially for high-profile vehicles. Issued: Tue, Dec 23, 2025 12:55 PM PST For more information go to: www.wpc.nce
Strong Atmospheric River Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Heavy precipitation with significant impacts is expected across California through Friday as an atmospheric river meanders over the state followed by coastal low pressure. The heaviest rain is forecast tonight through Wednesday with additional rounds expected then through Friday. ●High Risk of Flash Flooding Wednesday Particularly heavy rainfall late tonight through Wednesday will cause life-threatening flash flooding, along with landslides, rockfalls, and/or mudslides, particularly for Transverse Range, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Urban flooding in the greater Los Angeles metro area is likely. ●High-Elevation Snow Through Friday Prolonged heavy snow for the Sierra Nevada tonight through Friday with lowering snow levels will make travel increasingly difficult to impossible over the passes due to snow and strong winds. Several feet of heavy wet snow may also cause snow load impacts. ●Strong Winds Through Thursday Windy conditions are expected across the region through Thursday, especially in the mountains and coastal areas where tree damage and power outages are likely along with difficult travel, especially for high-profile vehicles. Issued: Tue, Dec 23, 2025 12:55 PM PST For more information go to: www.wpc.nce
Strong Atmospheric River Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Heavy precipitation with significant impacts is expected across California through Friday as an atmospheric river meanders over the state followed by coastal low pressure. The heaviest rain is forecast tonight through Wednesday with additional rounds expected then through Friday. ●High Risk of Flash Flooding Wednesday Particularly heavy rainfall late tonight through Wednesday will cause life-threatening flash flooding, along with landslides, rockfalls, and/or mudslides, particularly for Transverse Range, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Urban flooding in the greater Los Angeles metro area is likely. ●High-Elevation Snow Through Friday Prolonged heavy snow for the Sierra Nevada tonight through Friday with lowering snow levels will make travel increasingly difficult to impossible over the passes due to snow and strong winds. Several feet of heavy wet snow may also cause snow load impacts. ●Strong Winds Through Thursday Windy conditions are expected across the region through Thursday, especially in the mountains and coastal areas where tree damage and power outages are likely along with difficult travel, especially for high-profile vehicles. Issued: Tue, Dec 23, 2025 12:55 PM PST For more information go to: www.wpc.nce
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