textproduct: San Joaquin Valley

KEY MESSAGES

1. Areas of dense fog will develop each night and morning in the San Joaquin Valley this week.

2. Expect drying and warming conditions elsewhere with gusty easterly winds in the Kern County mountains at times this week.

3. Overnight cold temperatures continue to be near 30s.

DISCUSSION

Ridge of high pressure continues to dominate the areas sensible weather, and will continue to do so throughout the rest of this week and into this weekend. Areas of dense fog will remain the top story throughout the week, with everyday featuring some level of fog development. Probabilities of quarter-mile or less visibility is once again 50-70% across the valley Wednesday morning. Reduced visibilities will create hazardous driving conditions in areas of fog. Expect fog development each night and morning in the San Joaquin Valley for the remainder of the week.

Temperatures will continue to warm today, throughout the week, and into the weekend with high temperatures maxing out around the low 60s in the Valley and low 70s in the Mojave. Low temperatures remain in the 30s for the next couple of night in the Valley,but looking to stay above freezing in most locations. Some low 40s for low temperatures are probable into this weekend. In the longer term, not much change to the overall pattern as ridging stays locked in with any flow staying well north and east of California. CPC continues to carry above normal temperatures in the 6-10 and 8-14 day range, 70-80% and 50-60% respectively. Gusty easterly winds are likely in the Kern County mountains at times this week.

AVIATION

Widespread MVFR conditions with local IFR visibilities. Increasing chances of widespread IFR with LIFR/VLIFR probabilities reaching 40- 60% late tonight and early Wednesday morning, mainly after 09-11Z. At which time, fog redeveloping with patches of dense fog.

AIR QUALITY ISSUES

ISSUED: 01/12/2026 15:23 EXPIRES: 01/13/2026 23:59

On Wednesday January 14 2026, Unhealthy for Sensitive Groups in Fresno and Kern Counties. Fireplace/Wood Stove Burning Status is: No Burning For All in Fresno and Kern Counties. No Burning Unless Registered in Kings, Madera, Merced, and Tulare Counties. Burning Discouraged in Kern (Greater Frazier Park Area) and Sequoia National Park and Forest.

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.