030 FXUS66 KHNX 061756 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1056 AM PDT Sun Jul 6 2025 && .KEY MESSAGES... 1. Elevated fire weather conditions for Northwest Kern County Monday afternoon due to low RH around 20 percent and stronger wind gusts near 30 MPH. 2. Temperatures near season averages across the region today before a gradual warm up into the triple digits later this week. 3. Low RH values 15 to 25 percent will stretch across much of the San Joaquin Valley and Sierra Nevada with values 5 to 10 percent in the Mojave Desert. RH will decrease over the region later in the week with warming temperatures. && .DISCUSSION... A cutoff area of low pressure is currently progressing southward along the Pacific coast, and will come to a standstill around 200 miles from Monterey Bay overnight into tomorrow. At the same time, an area of high pressure is building over the Four Corners region. The combination of these synoptic features will cause the flow over central California to propagate from the southwest, driving warmer but near-average temperatures to the region through midweek. The orientation of the low is expected to cause stronger winds to develop in the lee side and wind-prone areas of the region Monday afternoon. Locations such as Lake Isabella and west of Lost Hills have a 50 to 60 percent chance or wind gusts to exceed 30 miles per hour; RH values near 20 percent in these areas will result in an elevated threat for fire weather conditions. As the week progresses, the aforementioned area of high pressure will slide to the west, centering over central and southern California Thursday. This placement of the high will bring a return to triple digit temperatures in the San Joaquin Valley through the weekend with the following daily probabilities. Thu Fri Sat Sun Bakersfield 45% 95% 80% 75% Coalinga 45% 65% 20% 35% Fresno 45% 95% 80% 65% Hanford 45% 95% 75% 65% Madera 45% 90% 65% 50% Merced 25% 80% 30% 20% Visalia 45% 90% 80% 75% The Kern Desert has a 40 to 90 percent chance for temperatures to exceed 105 degrees during the same time period, with Inyokern and Ridgecrest having the greatest of these probabilities. The warmer temperatures later in the week will also cause relative humidities to decrease. Widespread minRH values 10 to 20 percent are anticipated for the San Joaquin Valley and Sierra Nevada; values less than 10 percent are expected for the desert areas through the forecast period. && .AVIATION... 18Z Update: VFR conditions will prevail for the next 24 hours across the Central California Interior. && .AIR QUALITY ISSUES... ISSUED: 07/05/2025 15:10 EXPIRES: 07/06/2025 23:59 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... None. && $$ public/aviation...McCoy weather.gov/hanford