487
AGUS76 KRSA 271320
HMDRSA

Hydrometeorological Discussion
National Weather Service / California-Nevada RFC / Sacramento CA
620 AM PDT Sun Sep 27 2026

...CHANCES OF SHOWERS AND T-STORMS OVER SRN NV, SE CA, AND THE
SIERRA SUN-TUE AS A LOW MOVES THROUGH...
...DRY CONDITIONS THE REST OF THE PERIOD ALONG WITH WIDESPREAD ABOVE
NORMAL TEMPERATURES...

.METEOROLOGICAL CONDITIONS (SUN AM - SAT AM)...

A trough deepens offshore of nrn CA and the PacNW this morning. This
system will shift southeastward forming a cutoff low in the late
afternoon/early evening. Expecting the low to head across the Bay
Area overnight dipping into srn CA through early Monday afternoon
before pushing inland through se CA and finally off into the Desert
Southwest Tuesday evening. Expecting more widely scattered showers
for most of today before some tropical moisture moves into far
srn/se CA tonight/tomorrow. The system will pick up this moisture
and make for better chances of more widespread shower activity
across the Sierra, se CA, and srn NV Monday into Tuesday.
Thunderstorms over these areas are a possibility as well. The low
will also result in below normal temperatures for the next few days.

As the low exits, high pressure looks to build in behind it from
offshore. This should end any additional precip chances for the rest
of the forecast period as well as raising temperatures. Afternoon
high temperature anomalies are expected at +5 to +15 deg F through
at least Friday.


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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