Marine Weather and Tide Forecast for Vina, CA

DISCUSSION

Current synoptic pattern aloft has a ridge of high pressure across the four corners of the United States, with southwesterly flow over California. Satellite/observations have sunny conditions this afternoon, with temperatures hovering in the 80s to lower 90s. Highs will be in the 90s today within the Valley and portions of the foothills, with lower 100s in the northern Sacramento Valley. Cooler conditions as you head further into the mountains.
Warmest conditions are expected today through Friday, but trend cooler over the weekend and into next week. A weak trough moves along the ridge Thursday and Friday bringing lift to portions of northern California. Looking at soundings, we have weak synoptic support, little moisture content, and lacking instability to develop chances for showers and storms. Instability is slightly higher toward the Shasta-Trinity area and there is a very low chance (less than 5 percent) for a quick storm to develop in the afternoon/evening hours both Thursday and Friday. None the less, there will be enough forcing to bring clouds to Interior Northern California Thursday through Friday.

As the system moves through the region, winds become breezy through the Delta and into the Burney Basin. Delta winds gust up to 20kts during the evening hours helping to cool off temperatures and increase RH values. In the Burney Basin the already dry RH values in the upper teens to mid 20s range combined with breezy downsloping westerlies bring elevated fire weather concerns both Friday and Saturday. We will continue to monitor the fire weather conditions for the Burney Basin end of the week and into the weekend. Otherwise, looking behind the weekend conditions look to remain dry as the ridge remains locked into place.

AVIATION

VFR conditions continue through the TAF period, with breezy onshore winds within the Delta and portions of the Sacramento Metro this evening. A few gusts to 20kts in the Delta this evening. SCT to BKN clouds move in around 04-08z and continue through 18z for the Sacramento sites, MOD, and SCK.

STO WATCHES/WARNINGS/ADVISORIES
None.