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Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
640 AM PDT Thu Apr 23 2026

...MOSTLY DRY CONDITIONS FOR THURS/FRI BEFORE SHOWERS AND BELOW 
NORMAL TEMPERATURES RETURN FOR THE WEEKEND...

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

Dry conditions across the region today in between systems. 
Yesterday's trough continues to exit further inland while another 
approaches CA from the west. Troughing will move overhead this 
weekend from offshore as another descends from the PacNW. This is 
expected to generate scattered showers across the region, though 
mainly over the Sierra and eastward into NV as well as Shasta. 
Thunderstorms possible over nrn/central CA and across to NV. Expect 
temperatures to cool dropping down to -5 to -15 deg F below seasonal 
normals over the weekend. The trough will exit the region late 
Sunday/Monday as another low approaches from offshore. Some 
differences regarding the positioning and movement of that low 
between the models, but either way does not look like that one will 
produce any significant precip.

Morning forecast was mainly the morning WPC guidance. Nearly all the 
precip is expected for Saturday and Sunday mainly concentrated east 
of the valleys. QPF: 0.10-0.75" Sierra, 0.30-1.25" 
Shasta/srn/central NV, and a few hundredths to 0.15" over coastal srn 
CA. Freezing levels 9-11 kft through Friday lowering statewide to 6-
8 kft over the weekend. As the system exits, expect levels to 
rebound back up to 8-11 kft Monday.


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.