104
AGUS76 KRSA 201331
HMDRSA

Hydrometeorological Discussion
National Weather Service / California-Nevada RFC / Sacramento CA
630 AM PDT Thu Aug 20 2026

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

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

A strong area of high pressure remains centered over the Four
Corners this morning while an upper low approaches nrn CA and the
PacNW. Current satellite and lightning detection show an area of
thunderstorms just east of the CA border over AZ as well. Chances of
showers and thunderstorms are expected, mainly in the
afternoon/evening, over se CA and srn NV today. The current flow
regime should keep temperatures across much of nrn and central CA
within a few degrees of seasonal normals while areas further inland
may see anomalies of up to +10 deg F today/tomorrow. Cooling will
spread further across the region tomorrow into the weekend as the
upper low draws closer to the coast and with another moving in from
the nw afterwards should keep temperatures near normal through the
rest of the period. Mid level moisture and instability will result
chances of showers/thunderstorms through Monday. Best chances over
se CA and NV in general, though parts of the Sierra may also see a
few showers/thunderstorms over the weekend.

Freezing levels forecast to fluctuate between 13.5-16.5 kft through
the period.


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.

QPF graphics are available at www.cnrfc.noaa.gov/qpf.php



AS

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