| 32.0 | Disastrous flooding will occur across the entire lower Napa Valley with travel impossible. Disastrous flooding will also occur across towns in the Napa Valley...especially Napa. | | 30.0 | Major flooding will occur across the entire Napa Valley. Most roads will be flooded making travel nearly impossible. 20,000 acres or more of farm land in the Napa Valley will flood. | | 28.0 | Yountville and Napa will have major flooding. Major flood damage to farm land in the Napa Valley will occur. Travel will be very difficult to impossible in parts of the lower Napa Valley. | | 26.0 | Moderate flooding will cause crop losses and erosion to agricultural areas along the Napa River. Some primary roads and many secondary roads will have moderate flooding making travel very difficult. | | 25.0 | The lower areas of Yountville and Napa near the Napa River will have minor flooding. Some secondary roads will have minor flooding. | | 22.0 | Erosion of the lowest agricultural areas along the Napa River will occur. |
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1) 30.50 ft on 03/09/1995
2) 30.20 ft on 02/18/1986
3) 28.07 ft on 01/01/1997
4) 27.59 ft on 01/31/1963
5) 26.98 ft on 01/26/1995
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Low water records are unavailable.
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