Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
1100 AM EST Wed Dec 24 2025
Day 2
Valid 12Z Thu Dec 25 2025 - 12Z Fri Dec 26 2025

...THERE IS A MODERATE RISK OF EXCESSIVE RAINFALL FOR PORTIONS OF
SOUTHERN CALIFORNIA...

A Moderate Risk remains in effect for a large portion of the coast
from San Luis Obispo through much of the Transverse Ranges north
of L.A. Expect much of the heaviest rain to occur on D2/Wednesday,
but by Christmas Day, there will still be one more front that will
cross the area from west to east, which will result in another
round of heavy rainfall in southern California. Since this next
front will arrive soon after the heaviest rains from Wednesday,
expect there will be outsized impacts from the heavy rainfall
associated therewith. Showers and maybe even a few thunderstorms
will impact much of coastal southern California and the adjacent
mountains. While each one will be fast moving, the rivers and
streams all across southern California will likely already be
flooding, so any additional rainfall, especially where heavy, will
make ongoing flooding worse.

Campbell/Wegman


Day 2 threat area: www.wpc.ncep.noaa.gov/qpf/98epoints.txt