textproduct: San Joaquin Valley

UPDATE

Updated Aviation Section.

KEY MESSAGES

1. Chance for unsettled weather as precipitation, winds, and periodic thunderstorms continue into this weekend.

2. Wind Advisory for Mojave Slopes through Sunday night.

3. Winter Storm Warning in effect through 11 PM Sunday for the Sierra Nevada above 7,000 feet.

DISCUSSION

Showers and thunderstorms will continue over the region through this evening with latest radar data showing the bulk of the activity over the Sierra Nevada and adjacent foothills. Another trough of low pressure will pass over the forecast area on Saturday into Sunday which will produce another chance for showers and thunderstorms. In addition, gusty winds will continue in the Kern County desert through Sunday evening, with the strongest gusts expected over the Mojave Desert slopes. Most of the precipitation will occur Saturday evening into Sunday morning. Cool, unsettled continue until Monday, then temperatures gradually trend back up with highs towards seasonal averages by the middle of next week.

AVIATION

VFR conditions prevailing for the next 24 hours except MVFR with local IFR in showers/thunderstorms over the Sierra Nevada and adjacent foothills through 12Z Saturday. However, MVFR with local IFR in showers and thunderstorms over much the forecast area after 18Z Saturday. Gusts above 40 knots expected across the Mojave Desert slopes for the next 24 hours.

AIR QUALITY ISSUES

None.

CERTAINTY

The level of certainty for days 1 and 2 is high. The level of certainty for days 3 through 7 is medium.

Certainty levels include low...medium...and high. Please visit www.weather.gov/hnx/certainty.html for additional information and/or to provide feedback.

HNX WATCHES/WARNINGS/ADVISORIES

Wind Advisory until 11 PM PDT Sunday for CAZ338. Winter Storm Warning until 11 PM PDT Sunday for CAZ323-326>328- 330-331. Wind Advisory until 11 PM PDT this evening for CAZ337-339.