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MMWD Blog: Think Blue Marin

Welcome to our blog! Written by staff at MMWD, “Think Blue Marin” explores all things water in south and central Marin—water supplies, conservation, new projects, watershed management, and more.

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Nov 21

November Rains Arrive Right on Time

Posted on November 21, 2014 at 2:04 PM by Ann Vallee

The Mt. Tamalpais Watershed received a welcome 2.29 inches of rain over November 19 and 20, bringing the rainfall year total to date (since July 1) to 4.93 inches. More rain is in the forecast for Saturday, November 22. However, with only one week of November remaining, it is unlikely we will reach even the monthly average rainfall of 5.76 inches, let alone the year-to-date average of 7.4 inches.

Even so, MMWD's reservoir levels are 94% of average for this date.

Here are the current water statistics:

Reservoir Levels: As of November 21, reservoir storage is 48,126 acre-feet,* or 60% of capacity. The average for this date is 51,096 acre-feet, or 64% of capacity. Total capacity is 79,566 acre-feet.  

Rainfall: Rainfall this year to date (July 1- November 21) is 4.93 inches. Average for the same period is 7.4 inches.

Water Use: Water use for the week of November 10-16 averaged 18.97 million gallons per day, compared to 24.61 million gallons per day for the same week last year.      

Creek Releases: During the month of October 2014 MMWD released 173 million gallons, or 530 acre-feet, into Lagunitas and Walker creeks in west Marin for habitat enhancement.  

Water use and reservoir figures are updated weekly and can be found on our Water Watch page.

*One acre-foot is 325,851 gallons 


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