607 FXUS66 KHNX 202015 AFDHNX Area Forecast Discussion National Weather Service Hanford CA Issued by National Weather Service San Diego CA 115 PM PDT Fri Jun 20 2025 .KEY MESSAGES... 1. Elevated Fire risk for the West Side Hills on Today through Sunday Morning due to winds and low humidity. 2. Red Flag Warning in effect for the Mojave Slopes and Desert and the Indian Wells Valley until 5 AM on Sunday. 3. Major cool down on Saturday into Sunday with humidities slowly recovering. Better recovery occurring across the Sierra Nevada. 4. Wind gusts pick up through the weekend. A High Wind Warning is in effect for the Mojave Slopes through 2 AM Sunday and a Wind Advisory is in effect for the same time in the Mojave Desert. && .DISCUSSION... Deep trough digging toward Central California and expected to cross the region in the next 24 hours. With this disturbance, strong winds and a significant cool down will occur by this weekend. Yet, the strong winds will interact with the dry air across Central California and generate Elevated Fire Weather Condition through Sunday morning. Probability of Exceedance (PoE) of reaching 90 degree will remain at low percentages over the next few days as Valley temperatures struggle to reach 90 degrees. PoE of 90 degrees reaches the 50% mark by Monday and shows a steady claim during the week. PoE of 100 degree finally occurs on Friday when percentages reach around 50%. Therefore, while temperatures will struggle to reach the century mark, Friday will be the most likely day. Afterward, PoE shows a drop in percentages and another cool down occurs. Wind will be another issue as the next disturbance is ready to cross the district during the next 24 hours. The significant drop in temperatures will help generate a strong pressure gradient from KSFO to KLAS. Ensembles surface pressure analysis is indicating gradients reach ranges of 14mb-18mb on Saturday. At these levels, wind gusting to 50-60 mph have high confidence in occurring as PoE values sit at around 70%-90% on Saturday. Therefore, will maintain the High Wind products in place and extend the Red Flag Warning through Sunday as humidity will be slow to rise during the weekend. Strong winds across the San Joquin Valley on Saturday will also prompt a Red Flag Warning for the West Side of the Valley, including the West Hills. && .AVIATION... 18Z Update: VFR conditions will prevail for the next 24 hours across the Central California Interior. A 70%-90% chance of surface Wind G50KT across Kern County near KMHV and KIYK from 21Z Today through 10Z Saturday. && .AIR QUALITY ISSUES... 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... High Wind Warning until 5 AM PDT Sunday for CAZ338. Wind Advisory until 5 AM PDT Sunday for CAZ337-339. Red Flag Warning until 5 AM PDT Sunday for CAZ298. Red Flag Warning until 5 PM PDT Sunday for CAZ299. && $$ Public/Aviation....Molina weather.gov/hanford