Winter Storm Update

Updated 1/17/2019 at 10:00 am


Road Closures: 

A downed power pole has caused the closure of Molino Avenue at 85 Molino. Public safety crews are on scene and expect the road to be closed there for several hours. Please use alternate routes. 

Downed power lines on Alta Vista have caused the closure of the street.

A tree fell onto a power pole at 98 Sunnyside (within private property) that may necessitate a street closure for repairs.

Power Outages:

We are receiving reports of scattered power outages throughout the City and unincorporated Mill Valley. There are about 876 total customers at various locations reporting power outages. Check here for information.

Other Traffic Impacts: 

​Several traffic signals are in flash mode due to possible power outage. Please drive with caution.

Today's Forecast:

Today: Showers and possibly a thunderstorm, mainly before 5pm, then a slight chance of showers and thunderstorms after 5pm. Some of the storms could produce small hail. High near 57. Southwest wind around 18 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 47. West southwest wind 6 to 11 mph. New precipitation amounts of less than a tenth of an inch possible.

Advisory for Wednesday, January 17, 2019


Special Advisory to Residents in Low-Lying Areas

Mill Valley has the potential to experience localized flooding in the low lying areas.  If you live in an area that has a history of flooding, it is highly recommended that you be proactive now and stay alert.  

  • Monitor creek and tide levels. 
  • Consider moving personal belongings to higher ground, including vehicles. The Mill Valley Community Center is a good choice to safely park your vehicle away from flooding areas.  
  • Avoid walking in flood waters as this could pose a threat of injury or death.  
  • If present, avoid down power lines.  
  • If conditions worsen, the Fire Department recommends you shelter in place.


Check your property for areas where flooding could occur due to clogged drains or gutters. Make sure you, your family, your neighbors have an abundance of food, water, and batteries. Recharge your laptop computer, cell phone, and other mobile devices as a precaution against a power outage.

Commuters who travel in areas with a history of flooding are advised to monitor high tides. Check prior to your trip to anticipate traffic conditions. Road closures are often posted by the Mill Valley Police Department on Twitter.

Please be advised to keep out of creeks and waterways during the storm. 


Click here for the latest information about local storm conditions from the National Weather Service.

Power Outages

Residents are advised of possible downed trees and power lines. Power outages are likely in the Bay Area. Power can go out at any time - are you prepared? 

Here are some tips:

  • Check to make sure you have batteries, fully charged back-up battery packs for your devices, and a battery powered radio.
  • Recharge your laptop computer, cell phone, and other mobile devices as a precaution against a power outage.
  • Have flashlights with extra batteries for every household member.
  • Have enough nonperishable food and water.
  • Make sure you can open your garage door if the power goes out.

If the power goes out:

  • Do not call 9-1-1 unless you are having a life-threatening emergency.
  • Call (800) 743-5000 or check the PG&E Outage Map for updates. 
  • Monitor local news for information and updates.
  • Keep freezers and refrigerators closed.
  • Only use generators outdoors and away from windows.
  • Do not use a gas stove to heat your home.
  • Disconnect appliances and electronics to avoid damage from electrical surges.
  • Have alternate plans for refrigerating medicines or using power-dependent medical devices.
  • If safe, go to an alternate location for heat. 
  • Check on neighbors.

If you see a downed power line call 911 immediately. For more safety information about downed power lines click here.

Traffic & Road Closures

Flooding or fallen trees may cause traffic back-ups and road closures. Road closures will be posted at as they are reported. Check for updates on traffic before your trip. 

Drive with Caution: When driving in the rain, use extra caution and always have your headlights on. Remember, if you turn on your windshield wipers, turn on your headlights. Please obey the speed limits and follow other traffic at a safe distance.

Stock up on Sandbags

We urge residents to initiate their winter preparedness measures early in the season by seeking sand and sandbags should they need them. Sand and bags can be purchased at local hardware stores. Watch a video on how to fill and place sandbags.

City Supplied Sandbags (unfilled)
Residents or business owners may also pick up unfilled sand bags at:

Mill Valley Main Fire Station 7
(Public Safety Building), 1 Hamilton Drive.
Limit of 10 sandbags per household or business.

Sand may be located at the following locations:*

  1. Hauke Park parking lot next to Public Safety Building, 1 Hamilton Drive
  2. Thalia parking lot at Boyle Parkoff of East Blithedale Avenue
  3. Parking area on Molino Ave., behind Old Mill Park (approximately 100' yards east of Molino Avenue/Cascade Way)

*These locations have limited stockpiles of sand for emergency use during the rainy season. To use these stockpiles,you must supply your own labor, shovels and support.

Please note that the safety of Mill Valley citizens is the first priority of City work crews, and that replenishing the sand pile and bags may become a lower priority during a storm event. If you have questions or comments please call Department of Public Works at 388-4033 or the Fire Department at 389-4130. 


Please be aware that higher-than-usual tides (known as "King Tides") are forecast for the upcoming week:

Date                                      High Tide Time                     Height

1-18-19                                  8:39 am                               6’4”
1-19-10                                  9:28 am                               6’7”
1-20-19                                  10:17 am                             6’9”
1-21-19                                  11:07 am                             7’0”
1-22-19                                  11:58 am                             6’8”
1-23-19                                  12:51 am                             6’4”

High tides, combined with high run-off usually leads to flooding on lower Miller Avenue and Camino Alto, as well as the Redwood Hwy Frontage Road. 

Please click here for High Tide information.

How to stay informed during winter storms? 

We will post regular updates to the website.

Sign up for emergency alerts at Nixle and  

Be prepared

The City of Mill Valley strongly encourages businesses and residents to prepare for the upcoming rain and potential flooding. 

Click here for Storm Preparation information.