138 FXUS66 KHNX 281847 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1047 AM PST Sat Feb 28 2026 && .KEY MESSAGES... 1. Dense fog may form once again early morning Sunday in the San Joaquin Valley. 2. A low pressure system brings chances of precipitation over the Sierra Nevada on Sunday and Monday with snow levels at 7,000 to 8,000 feet. 3. A Wind Advisory has been issued from Sunday morning through Monday evening due to expected gusty winds along the Mojave Slopes and into the Desert. && .DISCUSSION... As a ridge remains over Central California tonight through the early morning tomorrow in the wake of a weak system from the Pacific, dense fog may develop again in the hours before sunrise tomorrow morning. There is currently a 40-50% chance for dense fog to form in the Valley according to the REFS ensemble, though other high-res models are in disagreement as to whether it will form at all due to the incoming system to may led to sufficient mixing. Looking to the incoming system, snow levels are forecast to be 7000-8000 feet through the whole event from Sunday morning through Monday afternoon. precipitation will mainly be confined to the Sierra Nevada down into the foothills with a couple hundredths possible for the adjacent Valley. The northern Sierras may see up to a quarter to a third of an inch over the course of the system, with amounts around a tenth of an inch in the surrounding foothills. The southern Sierras and those foothills may see amounts up to a tenth of an inch during that time period. This system may also lead to thunderstorms in the northern Sierra Nevada, with a 5-10% chance for development Sunday afternoon. This system may also lead to strong winds along the crests of the mountains and down the Mojave SLopes into the desert, so a Wind Advisory has been issued for the desert region due to the expected winds. A second, weaker system may move through Yosemite NP Wednesday afternoon and evening, with current rain totals of a few hundredths expected. The rest of the region is expected to see a cooling trend as these two weak troughs keep a larger ridge from forming through this week. Though the CPC still has our area in leaning above normal temps and leaning below normal precip for the 6-10 and 8-14 day outlooks. && .AVIATION... VFR conditions will prevail across the Central California interior for the next 24 hours with a 40-50% chance for IFR/LIFR conditions from 10Z through 15Z Sunday for the San Joaquin Valley. && .AIR QUALITY ISSUES... On Saturday February 28, 2026, Fireplace/Wood Stove Burning Status is: No Burning Unless Registered in Fresno and Kern Counties. Burning Discouraged in Kings, Madera, Merced, and Tulare Counties, and Kern (Greater Frazier Park Area) and Sequoia National Park and Forest. && .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 10 AM Sunday to 10 PM PST Monday for CAZ337>339. && $$ EW weather.gov/hanford