Marine Weather and Tide Forecast for Country Club, CA

DISCUSSION

A trough from the Gulf of Alaska continues to move through the area today, bringing isolated light showers and a 10-20% chance for isolated mountain thunderstorms this afternoon. Primary areas of concern today are over the southern Cascades and eastern Shasta County. Additionally, enhanced onshore winds are expected through the Delta and Valley through today introducing cooler temperatures and higher humidities throughout the area.

As the trough exits into the Great Basin area, north winds increase on Sunday through the western portions of the Sacramento Valley & Delta. This will result in renewed fire weather conditions Sunday into Monday. Strongest winds are expected Sunday morning. Since the strongest winds are forecast during the morning hours, they will not coincide with the lowest relative humidities. That being said, winds will still remain gusty through the afternoon hours when relative humidities will be in the teens to low 20s. The majority of elevated fire weather conditions will be in the northern Sacramento Valley along and west of I-5. Monday sees significantly weaker winds and therefore also lower fire weather concerns.

Deterministic EC and GFS continue to depict a lobe of energy phasing out of the exiting trough, though now primarily on Monday. This may introduce additional mountain shower and thunderstorm chances north of I-80. The overall environment will be dry which may negate any shower development, however, the feature will be closely monitored for any significant changes and/or additional fire weather concerns.

Moving further into the week, another cooling trend is expected Tuesday and beyond, resulting in below normal temperatures across interior NorCal and periods of breezy onshore flow in the forecast.

AVIATION

General VFR conditions are expected over the next 24 hours. South to southwest wind gusts to 15 to 20 kts until 07Z Sunday the in central/southern Sacramento Valley, and 15-25 kts in the Delta until 10Z Sunday. Winds shift out of the north through the Sac Valley after 10Z Sunday, with gusts 15 to 25 kts through 00Z Monday. 10-15% chance isolated thunderstorms in eastern Shasta County and the southern Cascades through 05z Sunday bringing local MVFR/IFR conditions.

STO WATCHES/WARNINGS/ADVISORIES
None.