Winter Storm Advisory

March 19, 2018

The National Weather Service has announced hazardous weather outlook for the North Bay. A storm system with significant moisture is forecast to impact the San Francisco Bay Area and Monterey Bay Area from Tuesday through Thursday. This system is expected to produce periods of heavy rain, and strong and gusty winds at times.

Residents are advised of possible downed trees and power lines. Power outages are likely in the Bay Area.

Residents in areas with a history of flooding are advised to monitor creek and tide levels. Move vehicles to higher ground, especially in flood-prone areas. Move items stored in low-lying areas, such as basements or other areas that have flooded in the past.


3/19/2018Mon1:30 AM5.45 ft
3/19/2018Mon1:48 PM5.06 ft
3/20/2018Tue2:02 AM5.58 ft
3/21/2018Wed2:37 AM5.65 ft
3/22/2018Thu3:17 AM5.66 ft

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

Power can go out at any time - are you prepared? If your power goes out, check the PG&E Outage Map for updates. 

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. 


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  

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.