New Drought Monitor map shows extreme dry conditions growing in Calif.

The new federal Drought Monitor map shows that localized drought conditions are increasing in Northern California.

The Sept. 22 map had 3% of the state in extreme drought while the Sept. 29 map released Thursday shows 13%.

In the Bay Area, the map reveals that drought conditions range from moderate to severe.

The Drought Monitor, a mechanism to measure drought that’s mainly used in agriculture, is a joint effort of the National Oceanic and Atmospheric Administration, the U.S. Department of Agriculture and the National Drought Mitigation Center at the University of Nebraska-Lincoln. A map is released each week with drought conditions across the country, indexing everything from groundwater storage to river levels. The factors California state water managers watch most closely are precipitation totals and reservoir and snowpack levels.

The presence of drought on the map is no surprise — especially in Northern California. While Southern California saw above-average rainfall

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