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AGUS76 KRSA 052058
HMDRSA

Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
100 PM PST Wed Nov 5 2025

...SCATTERED SHOWERS ACROSS NRN/CNTRL CA THE REST OF TODAY WITH T-
STORMS EXPECTED OVER PARTS OF NRN CA...
...ANOTHER MOISTURE SURGE TO BRING ADDITIONAL PRECIP TO THE N COAST
FOR THURSDAY BEFORE DRY CONDITIONS RETURN FRIDAY THROUGH THE
PERIOD...

.METEOROLOGICAL CONDITIONS (WED PM - TUE AM)...

Another 0.50" to 1.50" has fallen over the past 6 hours with the
highest amounts over the northern Sierra. Radar showing some
scattered showers across northern/central CA with the main area of
precip heading into the Sierra. Lightning detection reporting
multiple lightning strikes over nrn CA along the north coast and
inland around Shasta. TPW has the main moisture plume from the
Golden Gate to Point Conception still with a core of about 1.50" PW.
Expecting showers and thunderstorms to continue into the evening
diminishing and pulling northward overnight. Models continue to
predict another surge of moisture into the north coast mid Thursday
morning sending another round of more moderate to locally heavy
precip the rest of Thursday into Friday. The main focus of this
secondary surge will be along the north coast with amounts quickly
tapering off inland to Shasta and south of Cape Mendocino.

QPF for the afternoon update went up about 0.10-0.25" over the north
bay/north coast to account for some precip already fallen the past
couple of hours and down a similar amount elsewhere. Forecast was a
blend of the latest NBM and WPC guidance. Expecting another 1-2.50"
along the north coast through Friday morning (2.50-4.50" Smith
Basin), 1.50-3.50" Shasta, 0.75-1.50" central/northern Sierra, and
about 0.10-0.50" for the greater Bay Area (locally up to an inch or
so Big Sur).

Freezing levels about 7-9.5 kft north of I-80 and 9-13 kft from I-80
to the southern Sierra this afternoon. Levels will hover around
there most of today before rising again into Thursday back up to 8.5-
12 kft north of I-80. Friday once the precip has ended freezing
levels will rise more broadly across the region as high pressure
returns.


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



AS

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