FXUS66 KHNX 250721 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1221 AM PDT Sat Oct 25 2025 .KEY MESSAGES... 1. Fog will develop in the San Joaquin Valley once again this morning, although the chance for visibilities below 1/4 mile is less than 30 percent. 2. A low pressure trough is expected to move through Northern California today into Sunday, leading to cooler temperatures and light precipitation to Mariposa County and Yosemite NP. 3. After that system exits the state, warm and dry weather will follow, which would allow additional opportunities for dense fog formation in the mornings next week. 4. The Climate Prediction Center has placed Central California under above normal temperatures and normal for precipitation for the end of the month into early November. && .DISCUSSION... The upper-level trough passing over our forecast area today into Sunday will be responsible for cooler temperatures, gusty winds along the Mojave Desert slopes, and a slight chance for mainly light precipitation in the Sierra Nevada towards Yosemite National Park. Meanwhile, there is a chance for fog development later tonight and early this morning in the Central Valley. The chances are relatively low (less than 30 percent) for dense fog development, so will opt to issue no products at this time. However, will continue to monitor. Finally, winds will be strong enough to warrant a Wind Advisory (gusts around 50 mph) along the Mojave Desert slopes for later today into Sunday. Temperatures will trend upward starting Monday as a ridge of high pressure gradually builds into our area and much of the Golden State. At this time, expect mainly seasonably warm temperatures. By the latter part of next week, highs will be slightly above average. The warmest locations reach the 70's to near 80 degrees in the Central Valley by the end of next week, while highs in the Kern County desert will show a slight rise through the course of next week, or in the lower to mid-80's. The Climate Prediction Center continues to show near average precipitation and a tilt in the odds towards above average temperatures for the 6-10 day (60-70 percent chance) and 8-14 day periods (50-60 percent chance). && .AVIATION... IFR conditions may occur for all TAF sites except for BFL from 12Z through 18Z Saturday, then conditions become VFR through at least 12Z Sunday. && .AIR QUALITY ISSUES... None. && .CERTAINTY... The level of certainty for days 1 and 2 is medium. 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 from 11 AM this morning to 11 PM PDT Sunday for CAZ338. && $$ BSO weather.gov/hanford