The “more powerful” rivers in the atmosphere bring flood threats

A flooded section of a parking lot after a rainstorm at Seacliff State Beach in Aptos, Calif., on Sunday. Photo: Nic Coury/Bloomberg via Getty Images

asks California Gov. Gavin Newsom President Biden to make Emergency Announcement in response to a series from Deadly stormslike National Weather Service He warned that the “strongest regime” would arrive on Monday.

The Big Picture: The latest in a devastating barrage atmospheric rivers That has caused widespread power outages since then late last month It began unleashing stronger winds and heavy rain in California Sunday night — prompting Sacramento County to issue an evacuation order. order#%s For residents of the Wilton area, with flooding “imminent”.

Screenshot of a tweet from a service provider in Sacramento warning of widespread outages due to the storm's strong winds.
The Sacramento Municipal Utilities District said many customers will experience extended outages due to the devastation caused by high winds battering the area. photo: SMUD/Twitter

Play status: More than 424,000 Californians have lost power, more than 2,900 people have been evacuated from their homes, and 12 people are confirmed killed in the storms, said Nancy Ward, director of the California Governor’s Office of Emergency Services. surround Sunday.

  • that estimated More than 108,000 customers were still without power Sunday night, the Office of Emergency Management issued evacuation warnings to several areas in Santa Barbara County “due to potential flooding and debris flows.”

Threat level: Atmospheric river arriving Sunday night “will cause significant impact to travel” and infrastructure due to heavy rain, heavy mountain snow and damaging winds through Tuesday. NWS. Road closures, tree damage and river flooding are expected.

  • “In this weather pattern, additional rain on saturated soils will lead to significant flooding effects, including rapid rise of waters, mudslides, and scarring debris flow,” the NWS said in an update Sunday evening.
  • “The spread of snow in the mountains and high winds will produce problems across the state,” she added.
  • Heavy rain It is expected to add up to several inches across much of central California through Tuesday. The cumulative effect of successive heavy rainfall events will lead to additional flooding. This includes rapidly rising waters, mudslides, and the potential for major flooding in rivers.”
Screenshot of NWS tweet warning,
Photo: National Weather Service Los Angeles/Twitter

enlarge: There is a moderate risk of heavy rain for most of central California Monday, extending south into the transverse bands of Southern California, according to the NWS.

  • “As moisture continues to drop south Monday night and another round of rain enters Tuesday, flash flooding is likely to increase over Southern California’s coastal ranges through early this week,” the weather service said.
  • “The terrain and vulnerable areas near recent burn scars will be at greater risk for debris flows and rapid runoff.”

while, For the high terrain in the Sierra Nevada, “heavy snow and heavy snowfall rates” were expected to “make travel very dangerous to impossible at times,” with total snowfall amounts over 6 feet expected at 7,000 feet, according to NWS.

  • “This additional amount of snow accumulated on top of a well-built snowpack is likely to increase the risk of avalanches and stress on infrastructure,” the Met Service said.
  • “The combination of saturated soil and gusty winds can exacerbate the risk of tree damage.”
Photo: California Governor’s Office/Twitter.

recovery: Newsom Declare a state of emergency last week in response to River weather storm Associated with a bomb hurricane that brought heavy rains and hurricane-force winds to California.

Between the lines: The rivers in the atmosphere are powerful but the narrow currents in the air can carry them Huge amounts Water vapor thousands of miles from the tropics to mid and northern latitudes.

Editor’s note: This is a breaking news story. . Please check back for updates

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