Marine Weather and Tide Forecast for Plymouth, CA

DISCUSSION

This Weekend

Dry northerly winds pushed southward through the Valley this morning, confining any lingering fog and low clouds to the northern San Joaquin Valley as of early this afternoon. While winds gusting up to 35 mph will remain possible through the afternoon, they are expected to gradually decrease into the evening and overnight hours. As such, additional fog development into Sunday morning will likely remain patchy, with highest chances across the northern San Joaquin Valley.

On Sunday, a weak, embedded shortwave aloft will bring increasing cloud cover to the region, although dry weather is expected to continue. Resultant temperatures will be seasonably cool, with highs in the 50s for the Delta, Valley, and foothills and highs in the 40s at higher elevations. Modest gains in humidity recovery are also anticipated overnight Sunday into Monday.

The Week Ahead

Moving into next week, a more progressive upper level pattern looks to develop. Ridging aloft is expected to be the predominant feature through the early week, with periodic shortwave ejections mid to late week leading into a gradually more unsettled pattern.
At this time, the only discernible plumes of weak atmospheric river moisture are centered further northward, resulting in some uncertainty regarding available moisture with any shortwaves that move through. As a result, chances for light rain showers sit around 15-25%, with the highest potential on Wednesday across the northern Sacramento Valley and surrounding terrain. Likewise, attendant probabilities of rainfall greater than 0.1" around 20-40% are currently forecast for these locations.

Elsewhere, similarly seasonable temperatures are expected to prevail. High temperatures in the upper 50s to 60s at lower elevations and upper 40s to 50s at higher elevations are generally anticipated, with some variations later in the week dependent on cloud cover or lack thereof. Periodically breezy onshore winds may be possible with any shortwave ejections, otherwise, light, terrain driven winds look to remain the norm. Dry weather is likely to prevail from Interstate 80 southward until available moisture becomes more appreciable.

AVIATION

VFR conditions expected to prevail at most sites through the forecast period, although some MVFR/IFR in BR/FG will be possible at SCK and MOD after 06z Sunday. Breezy north winds, gusting 20-30 kts at times, persist across the Delta, Valley, and foothills today, gradually decreasing from 00z onward. Breezy east- northeast winds along the Sierra to gradually decrease after 06z.

STO WATCHES/WARNINGS/ADVISORIES
None.