SACRAMENTO (CBS/AP) – There’s more bad news for Californians dependent upon Sierra snowmelt for water—the state snow survey on Tuesday measured just 30 percent of normal.

Manual measurements taken Tuesday also support the findings of electronic monitors last week: The water content is only 26 percent of what’s usually measured on April 1, when the snowpack generally starts to melt.

READ MORE: Desperate To Find More Staff, Some Fast Food Restaurants Recruiting Customers

The Department of Water Resources depends on the surveys to make forecasts about deliveries through the State Water Project’s system of aqueducts. More than 28 million people and 29 agencies depend upon snowmelt for their water.

READ MORE: San Francisco Supervisors Approve Permanent Non-Citizen Voting In Board of Education Elections

KCBS’ Bob Melrose Reports:

The good news is that a storm brewing for Tuesday and Wednesday could bring up to 5 feet of snow at the highest elevations. Between 2 and 4 feet could fall above 6,500 feet.

MORE NEWS: San Francisco Ordinance Could Provide Easier Access To Paid Time Off For Domestic Workers

(Copyright 2012 by CBS San Francisco. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)