Marine Weather and Tide Forecast for Port Costa, CA

DISCUSSION

...Today & Monday...
Highs are expected to be in the high 70s to low 80s across the Valley, and in the 60s to mid 70s in the foothills. Gusty north to east winds peak today in the Valley, with gusts up to 40 to 50 mph through the evening. Valley winds will gradually decrease overnight before picking up slightly again on Monday; however, wind speeds on Monday will generally be lower than today, up to 35 mph in the Valley through Monday evening. Delta wind speeds will continue to gust up to 50 mph through Monday evening. A Wind Advisory for portions of the Valley and Delta remains in place until 8pm tonight. Additionally, with daytime humidities falling into the single digits and teens throughout the Valley, and poor overnight recoveries, a Red Flag Warning remains in place for elevations below 1000 ft through 8pm Monday.

Tuesday to Saturday
A warming trend continues on Tuesday and through the late week, with increasing areal coverage of Moderate HeatRisk in the Valley and foothills. Thursday also sees 70 to 90% chance of triple digit temperatures, primarily in the central and southern Sacramento Valley east of I-5. Daytime relative humidities will also remain in the single digit to teen range through at least the end of the week. This means that even with light winds in the forecast for the remainder of the week, some elevated fire weather risk will remain. It therefore remains important to practice fire safety this week! There is some indication that ridging will flatten out and therefore that temperatures will cool slightly over the weekend, but there is still some uncertainty in the forecast. Make sure to stay up to date at weather.gov/sacramento.

AVIATION
VFR conditions are expected over the next 24 hours. Northerly winds 20-30 kts with gusts 30-40 kts for the Valley and Delta through tonight. Then, northerly wind gusts up to 15-30 kts in the Valley and Delta until 00z Tuesday. Northeast to east winds 20-35 kts with gusts up to 35-50 kts over the Sierra through tonight, then gusts up to 20-35 kts through mid-day Monday.

STO WATCHES/WARNINGS/ADVISORIES
Red Flag Warning until 8 PM PDT Monday for Butte County Below 1000 ft-C. San Joaquin County including Stockton-C. Solano County including Fairfield-C. Stanislaus County including Modesto-C. Yolo/NE Solano including Woodland-Central Colusa County Incl. I-5-Central Glenn Co & Interstate 5-Eastern Colusa County-Eastern Glenn County-N. Sac Valley in Tehama County-NE San Joaquin Valley Below 1000 ft-SW Solano County including Vallejo-Sac Metro/W. El Dorado/Amador County-Sacramento County Delta-San Joaquin County Delta-Shasta Metro-Sutter/Yuba counties below 1000 ft-Tracy Triangle Below 1000 ft-W. Stanislaus County Above 1000 ft & I-5-W. Yolo County including Capay/I-505.

Wind Advisory until 8 PM PDT this evening for Butte County Below 1000 ft-C. Solano County including Fairfield-C. Yolo/NE Solano including Woodland-Central Colusa County Incl. I-5-Central Glenn Co & Interstate 5-Eastern Colusa County-Eastern Glenn County-N.
Sac Valley in Tehama County-SW Solano County including Vallejo- Sacramento County Delta-San Joaquin County Delta-Shasta Metro- Sutter/Yuba counties below 1000 ft-W. Yolo County including Capay/I-505.