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Hydrometeorological Discussion
National Weather Service / California-Nevada RFC / Sacramento CA
620 AM PDT Fri Aug 21 2026

...INCREASING CHANCES OF SHOWERS/T-STORMS OVER E NV AND SE CA 
THROUGH MONDAY...
...TEMPERATURES HOVERING AROUND AVERAGE THROUGH THE PERIOD...

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

An upper low offshore continues to make its way towards the PacNW as 
a strong upper ridge resides over the Four Corners. Areas closer to 
the low should see near to below normal temperatures today while 
those closer to the ridge near to above normal temperatures 
(anomalies -10 to +10 deg F). Additionally, continued chances of 
showers and thunderstorms over se CA and much of NV as mid level 
moisture and instability rotate overhead. The offshore low will 
shrink in size as it heads into the PacNW over the weekend. 
Additional systems over the Gulf of Alaska and offshore of the PacNW 
will keep the general pattern of troughing offshore and high 
pressure inland throughout the rest of the forecast period. This is 
expected to keep most of the region near seasonal averages as far as 
temperatures go. Chances of showers and thunderstorms expected to 
persist through Monday over se CA, parts of the Sierra (Sat and Sun) 
and NV. After that, models show drier air moving over much of CA 
diminishing chances of convection. There may still be some activity 
over far se CA and srn NV.

Freezing levels expected between 13-16.5 kft through the period with 
some fluctuations.


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.