November 2025
Region 4: San Joaquin & Tulare
CAP model output indicates that Region 4 will receive 92.5-112.5% of normal precipitation. For Region 4, 92.5-112.5% of normal equates to 36.94-44.93”.
The regional gauge below shows the CAP forecast lower and upper bounds (36.94-44.93”), the “normal” for Region 4, and the observed precipitation through the end of October. With an early boost from the October 13-14 precipitation event, this region recorded 2.6 inches of accumulation in October and sits at 6.5% of total water year precipitation.
The NWS data feed we typically use for verification has been permanently discontinued due to federal funding issues so we have made some adjustments to our verification framework. Estimates for water year averages are calculated using station data from the regional precipitation indices produced by the California-Nevada River Forecast Center (CNRFC): the 8 stations comprising the Northern Sierra represent our CAP Region 2, the 5 stations of the San Joaquin Basin represent our CAP Region 4, and the 6 stations of the Tulare Basin represent our CAP Region 6.

