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Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
830 AM PST Wed Feb 25 2026

...REMNANT SHOWER ACTIVITY TODAY ASSOCIATED WITH DISSIPATING 
ATMOSPHERIC RIVER OVER NORTHERN CALIFORNIA...
...POTENTIAL WEAK SYSTEM OVER THE WEEKEND TO SPREAD MODEST 
PRECIPITATION ACROSS THE NORTH...

.METEOROLOGICAL CONDITIONS (WED AM - TUE AM)...

Lingering showers remain over northern California as the atmospheric 
river continues to dissipate. Remnant weak onshore moisture flux 
(~350 units) persists from the North Coast down to Point Conception 
which is producing light showers over the Sierra Nevada but IS too 
weak for any precipitation, outside of scattered showers, anywhere 
else. Modest moisture flux will persist throughout most of the day 
today producing light precipitation over the Sierra Nevada into 
tonight. 

Ridging is forecast to rebuild on Thursday resulting in a dry period 
through the rest of the week. As the ridge is building, a cutoff low 
pushes to the north off the coast of NorCal and begins approaching 
the coast on Saturday. Weak onshore moisture flux (~250 units) looks 
to move onshore and spread weak shower activity leading to modest 
precipitation accumulations across the north. The heaviest day 
during this weak disturbance looks to be Saturday with up to half an 
inch across the higher elevations of the Smith Basin. The system is 
forecast to continue spreading southward and inland throughout the 
weekend and into early next week spreading light precipitation down 
the Sierra and across northern Nevada. 

Freezing levels will remain relatively high throughout the rest of 
the work week, peaking at 11k to 14.5k feet north to south Friday 
night. Levels are forecast to lower during the weekend disturbance 
to 7k across the north and 13k across the south on Sunday evening. 

Please Note: This product may NOT be routinely updated.
Please refer to the following product issued by the CNRFC
www.cnrfc.noaa.gov/Daily-Briefing for a graphical summary of
weather and hydrologic conditions.