NWS (bot)
@nws_bot@m.ai6yr.org  ·  activity timestamp 3 hours ago
Powerful Offshore Low Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Periodic heavy precipitation with prolonged impacts continues across California through Friday from offshore low pressure that follows the ongoing atmospheric river. ●Continued Flash Flood Risk The focus of the atmospheric river is shifting east of the LA Basin this afternoon and will weaken overnight. Additional rounds of heavy rain can be expected along the California coast and into the Central Valley through Friday. Additional life-threatening flash flooding is possible in Southern California through Thursday. ●Mountain Snow Through Friday Additional heavy snow will occur in the Sierra Nevada and other mountain ranges through Friday, with lower snow levels than previous rounds. Travel will remain 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 continue across California through Thursday. Saturated soils should lead to further tree damage and power outages are likely. Difficult travel also persists, especially for high-profile vehicles. Issued: Wed, Dec 24, 2025 2:10 PM PST For more information go to: www.wpc.ncep.noaa.gov and www.weather.gov Excessive Rain Outlooks Through Friday Winter Storm Severity Index Through Fri
Powerful Offshore Low Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Periodic heavy precipitation with prolonged impacts continues across California through Friday from offshore low pressure that follows the ongoing atmospheric river. ●Continued Flash Flood Risk The focus of the atmospheric river is shifting east of the LA Basin this afternoon and will weaken overnight. Additional rounds of heavy rain can be expected along the California coast and into the Central Valley through Friday. Additional life-threatening flash flooding is possible in Southern California through Thursday. ●Mountain Snow Through Friday Additional heavy snow will occur in the Sierra Nevada and other mountain ranges through Friday, with lower snow levels than previous rounds. Travel will remain 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 continue across California through Thursday. Saturated soils should lead to further tree damage and power outages are likely. Difficult travel also persists, especially for high-profile vehicles. Issued: Wed, Dec 24, 2025 2:10 PM PST For more information go to: www.wpc.ncep.noaa.gov and www.weather.gov Excessive Rain Outlooks Through Friday Winter Storm Severity Index Through Fri
Powerful Offshore Low Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Periodic heavy precipitation with prolonged impacts continues across California through Friday from offshore low pressure that follows the ongoing atmospheric river. ●Continued Flash Flood Risk The focus of the atmospheric river is shifting east of the LA Basin this afternoon and will weaken overnight. Additional rounds of heavy rain can be expected along the California coast and into the Central Valley through Friday. Additional life-threatening flash flooding is possible in Southern California through Thursday. ●Mountain Snow Through Friday Additional heavy snow will occur in the Sierra Nevada and other mountain ranges through Friday, with lower snow levels than previous rounds. Travel will remain 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 continue across California through Thursday. Saturated soils should lead to further tree damage and power outages are likely. Difficult travel also persists, especially for high-profile vehicles. Issued: Wed, Dec 24, 2025 2:10 PM PST For more information go to: www.wpc.ncep.noaa.gov and www.weather.gov Excessive Rain Outlooks Through Friday Winter Storm Severity Index Through Fri
NWS (bot)
@nws_bot@m.ai6yr.org  ·  activity timestamp 3 hours ago
Powerful Offshore Low Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Periodic heavy precipitation with prolonged impacts continues across California through Friday from offshore low pressure that follows the ongoing atmospheric river. ●Continued Flash Flood Risk The focus of the atmospheric river is shifting east of the LA Basin this afternoon and will weaken overnight. Additional rounds of heavy rain can be expected along the California coast and into the Central Valley through Friday. Additional life-threatening flash flooding is possible in Southern California through Thursday. ●Mountain Snow Through Friday Additional heavy snow will occur in the Sierra Nevada and other mountain ranges through Friday, with lower snow levels than previous rounds. Travel will remain 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 continue across California through Thursday. Saturated soils should lead to further tree damage and power outages are likely. Difficult travel also persists, especially for high-profile vehicles. Issued: Wed, Dec 24, 2025 2:10 PM PST For more information go to: www.wpc.ncep.noaa.gov and www.weather.gov Excessive Rain Outlooks Through Friday Winter Storm Severity Index Through Fri
Powerful Offshore Low Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Periodic heavy precipitation with prolonged impacts continues across California through Friday from offshore low pressure that follows the ongoing atmospheric river. ●Continued Flash Flood Risk The focus of the atmospheric river is shifting east of the LA Basin this afternoon and will weaken overnight. Additional rounds of heavy rain can be expected along the California coast and into the Central Valley through Friday. Additional life-threatening flash flooding is possible in Southern California through Thursday. ●Mountain Snow Through Friday Additional heavy snow will occur in the Sierra Nevada and other mountain ranges through Friday, with lower snow levels than previous rounds. Travel will remain 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 continue across California through Thursday. Saturated soils should lead to further tree damage and power outages are likely. Difficult travel also persists, especially for high-profile vehicles. Issued: Wed, Dec 24, 2025 2:10 PM PST For more information go to: www.wpc.ncep.noaa.gov and www.weather.gov Excessive Rain Outlooks Through Friday Winter Storm Severity Index Through Fri
Powerful Offshore Low Brings Heavy Rain, Snow, and Wind to California Through Friday Key Messages for California Atmospheric River Weather Prediction Center College Park, Maryland ●Widespread Rainfall Periodic heavy precipitation with prolonged impacts continues across California through Friday from offshore low pressure that follows the ongoing atmospheric river. ●Continued Flash Flood Risk The focus of the atmospheric river is shifting east of the LA Basin this afternoon and will weaken overnight. Additional rounds of heavy rain can be expected along the California coast and into the Central Valley through Friday. Additional life-threatening flash flooding is possible in Southern California through Thursday. ●Mountain Snow Through Friday Additional heavy snow will occur in the Sierra Nevada and other mountain ranges through Friday, with lower snow levels than previous rounds. Travel will remain 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 continue across California through Thursday. Saturated soils should lead to further tree damage and power outages are likely. Difficult travel also persists, especially for high-profile vehicles. Issued: Wed, Dec 24, 2025 2:10 PM PST For more information go to: www.wpc.ncep.noaa.gov and www.weather.gov Excessive Rain Outlooks Through Friday Winter Storm Severity Index Through Fri
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
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
FinchHaven sfba and 1 other boosted
AI6YR Ben
@ai6yr@m.ai6yr.org  ·  activity timestamp 2 days ago
Widespread Rainfall Heavy precipitation is expected across California as the atmospheric river meanders over the state through Friday. Periods of heavy rain are expected with significant impacts «High Risk of Flash Flooding Heavy rainfall will cause considerable lash flooding, particularly along the southern slopes of the Transverse Range on Wednesday, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Landslides, ockfalls, and mudslides are possible. Urban flooding i the metro areas of Southern California will also be possible. © High-Elevation Snow A prolonged heavy snow event is expected in the Sierra Nevada, contributing to snowpack water storage but also raising concerns for major snowload impacts. Travel may be dificult to impossible over the high-mountain passes due to snow and strong winds. o Strong Winds Breezy to windy conditions are liely across the region, especially in the mountains where tree damage and power outages are possible.
Widespread Rainfall Heavy precipitation is expected across California as the atmospheric river meanders over the state through Friday. Periods of heavy rain are expected with significant impacts «High Risk of Flash Flooding Heavy rainfall will cause considerable lash flooding, particularly along the southern slopes of the Transverse Range on Wednesday, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Landslides, ockfalls, and mudslides are possible. Urban flooding i the metro areas of Southern California will also be possible. © High-Elevation Snow A prolonged heavy snow event is expected in the Sierra Nevada, contributing to snowpack water storage but also raising concerns for major snowload impacts. Travel may be dificult to impossible over the high-mountain passes due to snow and strong winds. o Strong Winds Breezy to windy conditions are liely across the region, especially in the mountains where tree damage and power outages are possible.
Widespread Rainfall Heavy precipitation is expected across California as the atmospheric river meanders over the state through Friday. Periods of heavy rain are expected with significant impacts «High Risk of Flash Flooding Heavy rainfall will cause considerable lash flooding, particularly along the southern slopes of the Transverse Range on Wednesday, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Landslides, ockfalls, and mudslides are possible. Urban flooding i the metro areas of Southern California will also be possible. © High-Elevation Snow A prolonged heavy snow event is expected in the Sierra Nevada, contributing to snowpack water storage but also raising concerns for major snowload impacts. Travel may be dificult to impossible over the high-mountain passes due to snow and strong winds. o Strong Winds Breezy to windy conditions are liely across the region, especially in the mountains where tree damage and power outages are possible.
AI6YR Ben
@ai6yr@m.ai6yr.org  ·  activity timestamp 2 days ago
Widespread Rainfall Heavy precipitation is expected across California as the atmospheric river meanders over the state through Friday. Periods of heavy rain are expected with significant impacts «High Risk of Flash Flooding Heavy rainfall will cause considerable lash flooding, particularly along the southern slopes of the Transverse Range on Wednesday, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Landslides, ockfalls, and mudslides are possible. Urban flooding i the metro areas of Southern California will also be possible. © High-Elevation Snow A prolonged heavy snow event is expected in the Sierra Nevada, contributing to snowpack water storage but also raising concerns for major snowload impacts. Travel may be dificult to impossible over the high-mountain passes due to snow and strong winds. o Strong Winds Breezy to windy conditions are liely across the region, especially in the mountains where tree damage and power outages are possible.
Widespread Rainfall Heavy precipitation is expected across California as the atmospheric river meanders over the state through Friday. Periods of heavy rain are expected with significant impacts «High Risk of Flash Flooding Heavy rainfall will cause considerable lash flooding, particularly along the southern slopes of the Transverse Range on Wednesday, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Landslides, ockfalls, and mudslides are possible. Urban flooding i the metro areas of Southern California will also be possible. © High-Elevation Snow A prolonged heavy snow event is expected in the Sierra Nevada, contributing to snowpack water storage but also raising concerns for major snowload impacts. Travel may be dificult to impossible over the high-mountain passes due to snow and strong winds. o Strong Winds Breezy to windy conditions are liely across the region, especially in the mountains where tree damage and power outages are possible.
Widespread Rainfall Heavy precipitation is expected across California as the atmospheric river meanders over the state through Friday. Periods of heavy rain are expected with significant impacts «High Risk of Flash Flooding Heavy rainfall will cause considerable lash flooding, particularly along the southern slopes of the Transverse Range on Wednesday, including the San Bernardino, San Gabriel, and Sierra Madre Mountains. Landslides, ockfalls, and mudslides are possible. Urban flooding i the metro areas of Southern California will also be possible. © High-Elevation Snow A prolonged heavy snow event is expected in the Sierra Nevada, contributing to snowpack water storage but also raising concerns for major snowload impacts. Travel may be dificult to impossible over the high-mountain passes due to snow and strong winds. o Strong Winds Breezy to windy conditions are liely across the region, especially in the mountains where tree damage and power outages are possible.
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