Marine Weather and Tide Forecast for Bethel Island, CA

DISCUSSION

...Today - Sunday... Eastern Pacific high pressure ridging continues a stagnant pattern across the region, with a strong inversion keeping mist, fog and low stratus over the Valley and Delta and into the lower foothills. Patchy fog has primarily been observed over the northern Sacramento Valley and in the foothills (1500-2000 feet) where low clouds are intersecting with the terrain. Fog in the northern Sacramento Valley has diminished this afternoon, but lingers in the foothills. This pattern is expected to continue with low clouds persisting and some patchy fog reforming in the Valley again tonight, most likely around the Redding area. Winds remain generally light and variable.

This pattern is expected to persist through the week and even into the weekend as the high pressure ridge continues to build. Dry weather continues across the region. The exception to this is periods of mist and drizzle at times with the low clouds and fog, which may wet the ground. The low clouds continue to keep high temperatures unseasonably cool in the Valley and Delta, generally 10-14 degrees below normal, while higher terrain experiences sunny skies and above normal temperatures (10-20 degrees above normal). The building high will bring further warming temperatures to the area over higher terrain, generally for locations above 1500 feet. Stratus and fog will prevent this warming for portions of the Valley and Delta that remain covered, though, so little change in is expected in those areas this week, with unseasonably cool temperatures persisting. The northern Sacramento Valley has the best potential for seeing some clearing due to a thinner cloud deck and some light northerly winds late in the week, which could bring a gradual increase in temperatures there locally.

Next Week

A pattern change is projected for early next week, but there remains quite a bit of uncertainty in the timing and intensity of this system. Current forecast shows the potential for precipitation north of I-80, especially for the mountains. The best chances expected over the mountains of Shasta County, but little to no impacts are expected at this point. This system could potentially end this stagnant pattern. Stay tuned for forecast updates.

AVIATION

Lingering low cigs and mist across the Central Valley continue into this evening with IFR/LIFR conditions, although some sites may very briefly see MVFR/VFR visibility around 22-24Z, mainly for TAF sites north of Sacramento. Another round of BF/FG and low stratus returns after 03Z-06Z with areas of IFR/LIFR ceilings once again expected to persist through the day. Light and variable surface winds less than 12kts.

STO WATCHES/WARNINGS/ADVISORIES
None.