Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
958 FXUS66 KHNX 031809 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1009 AM PST Wed Dec 3 2025 .KEY MESSAGES... 1. Fog and low clouds will continue each night and morning across the San Joaquin Valley for the remainder of this week. Fog will also continue through this afternoon along the Interstate 5 corridor through the lower portions of the Grapevine. 2. A dry disturbance will introduce increasing winds across the deserts and mountain peaks until Thursday; cold morning lows also anticipated for the high Sierra. && .DISCUSSION... Low clouds mainly persist in the San Joaquin Valley into the lower Sierra Nevada foothills and Kern County mountains. Some dense fog, however, will linger towards the base of the Grapevine to elevations just above 2,000 feet into this afternoon. Thus, have issued a Dense Fog Advisory for this particular area until 3 PM this afternoon. Additional fog development tonight into Thursday morning will depend on whether the low clouds clear out over the Central Valley by this afternoon. Some high clouds may also delay fog development tonight, as well as eroding the stratus cloud deck. At this time, we are seeing about a 50-70 percent chance for visibilities to drop below one quarter of a mile late tonight until late Thursday morning. As for the higher elevations of the Sierra Nevada, expect cold overnight lows combined with strong and gusty winds tonight into Thursday morning. A Cold Weather Advisory remains in effect for these areas until 9 AM PST Thursday, due to a passing upper- level disturbance. Otherwise, seasonably cool weather will continue into next week, though with mainly dry conditions. Increased probabilities of below average precipitation will last for at least the next week or two, which includes up to a 50-60% chance for the 6-10 day period, per the Climate Prediction Center. For the Central Valley, this will mean either dense fog in the nights and mornings or a persistent stratus deck. && .AVIATION... IFR/LIFR visibilities are expected at all TAF sites for the next 24 hours. Brief improvements into MVFR expected between 22Z Wednesday and 03Z Thursday. Between 11Z and 19Z Thursday,VLIFR conditions have a 50% to 70% chance of occurring in dense fog. && .AIR QUALITY ISSUES... On Wednesday December 3 2025, Fireplace/Wood Stove Burning Status is: No Burning Unless Registered in Fresno, Kern, 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. && .HNX WATCHES/WARNINGS/ADVISORIES... Dense Fog Advisory until 11 AM PST this morning for CAZ305>307- 309>312-314-315. Cold Weather Advisory until 9 AM PST Thursday for CAZ323- 326>328-330-331. Dense Fog Advisory until 3 PM PST this afternoon for CAZ335. && $$ BSO weather.gov/hanford