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Hydrometeorological Discussion
National Weather Service / California-Nevada RFC / Sacramento CA
640 AM PDT Tue Jun 23 2026

...CONTINUED ABOVE NORMAL TEMPS THROUGH MID-WEEK, CHANCES OF 
SHOWERS/T-STORMS OVER S/SE CA & NV TODAY AND TOMORROW...
...APPROACHING LOW TO BRING SHOWERS TO FAR NRN CA/NV FRI/SAT ALONG 
WITH COOLER TEMPS...

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

High pressure will expand northeastward into CA/NV today resulting 
in continued above normal temperatures away from the coast. 
Temperature anomalies are expected at +5 to +15 deg F through 
Wednesday. Additionally, this ridge will push mid level moisture and 
instability into the area generating chances of showers and 
thunderstorms over srn CA/NV. This will continue for Wednesday as 
well with the area of thunderstorms expanding into other parts of NV 
and nrn CA near the OR border as troughing begins to move in from a 
larger low over the Gulf of Alaska. As the low slowly heads towards 
the west coast, troughing will push that moisture/instability out of 
the region on Thursday while beginning to moderate temperatures. Far 
interior CA and NV will still see above normal temperatures but not 
to the degree expected today and tomorrow. The approaching low is 
forecast to bring some shower activity into far nrn CA/NV Friday and 
Saturday. Models disagree on the exact timing, but the core of 
system is progged to move through the PacNW and into ID Saturday 
into Sunday before lifting northeastward into MT later Sunday. This 
should pull precip mainly out of the region aside from a few 
lingering showers possibly over nrn NV. Amounts still look to be 
0.10" or less in general with scattered amounts of 0.10-0.25".

Freezing levels should stay about 13-16.5 kft through Thursday 
before that approaching low lowers levels gradually into the 
weekend. Saturday morning expecting levels to drop down to 7.5-10.5 
kft from the border to Shasta before rebounding the rest of the 
weekend. All of CA should be back above 11 kft by Monday morning.


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.