Weather Update: Heavy Rain Expected Monday Night, Through Tuesday

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County officials issued an evacuation warning to residents living in low-lying areas near the Russian River, shown here with high waters following a past weather event. (Shutterstock)
Several Sonoma County school districts closed Monday in anticipation of next atmospheric river
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County officials issued an evacuation warning to residents living in low-lying areas near the Russian River, shown here with high waters following a past weather event. (Shutterstock)

The Sunday weather in the North Bay was milder than expected, according to local weather watchers, as daytime sun offered a reprieve from the rain and overnight showers subsided by late morning Monday, though the chance of further precipitation throughout the day remained at 90%.
The National Weather Service predicted highs near 58, with southwest winds from 6 to 9 mph, and gusts as high as 20 mph. New daytime rains could bring between a tenth and quarter of an inch.
Rain is expected tonight between 10 p.m. and 4 a.m., when another atmospheric river batters the region bringing between a quarter and half an inch of rain. All told, the latest storm could dump more than 3 inches of rain on the North Bay, according to the NWS.
Tuesday will bring more rain and the chance of thunderstorms, according to the NWS.
In anticipation of harried weather, several Sonoma County school districts announced they’d be closed Monday, including Fort Ross Elementary School District, Guerneville School Distrist, Horicon School District, and Kashia School District, Montgomery Elementary, according to the Sonoma County Office of Education.

Sonoma County emergency officials issued an evacuation warning over the weekend for residents of low-lying areas along the lower Russian River, urging people to prepare to leave in anticipation of the river reaching flood levels of 33 to 40 feet.

A map of the area covered by the evacuation warning is available at https://socoemergency.org/emergency/warnings-and-updates.

For those in need of shelter, the county has opened an emergency shelter in the E.C. Kraft Building at the Sonoma County Fairgrounds in Santa Rosa. Check in with security at Gate 2, located at 1350 Bennett Valley Road. in Santa Rosa. Cots and comfort kits will be supplied by the American Red Cross of the North Bay, and mental health services will be available from the Sonoma County Department of Health Services. Pets are allowed. Masks will be required inside the shelter, a requirement by the state Department of Public Health to reduce the spread of COVID-19.

The county also will provide assistance for those who need help moving an RV or other vehicle out of the evacuation warning zone. For information about assistance in relocating vehicles, call 707-565-2454. People living in nontraditional housing conditions are advised to move to higher elevation if they are located in low-lying areas.

Evacuations may be necessary for those living in the areas below the 33-foot flood level in the lower Russian River area. Be sure to take essential items, such as medicines with you, advise county officials. If you live above the 33-foot level, your access may be reduced or restricted.

An evacuation warning means there is a threat in the area. Be prepared to leave if an evacuation order is issued for your area. If you feel unsafe, do not wait for an evacuation order, leave immediately.

  • Gather essential items now to be ready to go.
  • Check your neighbors to see if they need assistance evacuating.
  • Continue to monitor local media, social media and be sure you are signed up for alerts.

Visit https://socoemergency.org/emergency/evacuation-zones/ to see if your property is included in the evacuation warning zone.

Current weather conditions and soil saturation levels are also creating conditions for mudslides – rivers of mud that move fast and with little to no warning. Mudslides usually occur when water rapidly accumulates on steep slopes, which results in a surge of water-saturated rock, earth, and debris.

As water carries debris downhill, material can get trapped behind roads and structures, causing washouts. The potential for these conditions are prominent throughout the hillside neighborhoods in the Russian River region. Areas that burned in the 2020 Glass fire east of Santa Rosa are particularly vulnerable to mudslides.

Local emergency and weather officials are advising Sonoma County residents to avoid unnecessary travel and prepare for high winds, flash flooding, downed trees and the potential for power outages throughout the region, as well as the potential for landslides or debris flows in burn scar areas.

In addition to a High Wind Warning across the region, the National Weather Service has issued a High Surf Warning for coastal areas and a Coastal Flood Advisory for the North Bay.

Follow the County of Sonoma’s Facebook page for updates on the storm. Other official sources of information are available on SoCoEmergency.org.

County emergency officials are advising the following steps to protect yourself, your family and neighbors and your property during these storms:

  • Do not walk, swim, or drive through flood waters. Turn Around, Don’t Drown!
  • If your vehicle is trapped in rapidly moving water, stay inside. If water is rising inside the vehicle, seek refuge on the roof.
  • Stay off of bridges over fast-moving water.
  • Learn and practice evacuation routes, shelter in place, and flood response.
  • Make sure your Go Bag is ready in case you have to leave immediately.
  • Evacuate if told to do so.
  • Keep in mind medication needs. Don’t forget the needs of pets.
  • Locate backup batteries and charging devices for phones, radios and other emergency equipment.
  • Keep important documents in a waterproof container.
  • If flooding occurs on your property, move to higher ground. If trapped in a building, go to its highest level. Do not climb into a closed attic. Go on the roof only if necessary

More information about preparing for floods, including sandbag locations, is available at https://socoemergency.org/emergency/flooding/

Information about preparing for landslides is available at  https://socoemergency.org/get-ready/local-hazards/landslides/

Sign up for Sonoma County emergency alerts here: https://socoemergency.org/get-ready/sign-up/

A full list of road closures, including text and email alerts, is available at https://socoemergency.org/emergency/road-closures/

Review official sources of information in Sonoma County here: https://socoemergency.org/get-ready/official-information/

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