Marine Weather and Tide Forecast for Vallejo, CA

DISCUSSION

...Today - Sunday... Eastern Pacific high pressure ridging continues a stagnant pattern across the region, with a strong inversion keeping 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). Fog in the Valley has diminished this afternoon, but lingers in the foothills where the low clouds intersect the terrain. This pattern is expected to continue with low clouds persisting and some patchy fog reforming in the Valley again tonight. 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 sprinkles at times with the low clouds and fog, which may wet the ground. The low clouds continue to keep temperatures unseasonably cool in the Valley and Delta, while higher terrain experiences sunny skies and above normal temperatures. The building high will bring warming temperatures to the area, especially over higher terrain. Stratus and fog will limit this warming for portions of the the Valley and Delta that remain covered, though, so there may be little change in those areas this week. The northern Sacramento Valley has the best potential for seeing some clearing and increasing temperatures.

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. 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 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.