Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
807 FXUS66 KHNX 300818 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 118 AM PDT Tue Sep 30 2025 .KEY MESSAGES... 1. Showers and thunderstorms will continue for the overnight hours tonight in the Sierra Nevada, mainly Fresno County to Yosemite. Showers and thunderstorms are once again possible later today (a 20-30% chance of precipitation and a 10-20% chance of thunderstorms). 2. Another system will bring the next chance for showers and thunderstorms on Thursday and Friday in portions of the Sierra Nevada and adjacent foothills, mainly Fresno County northward. 2. Expect below average temperatures for the next several days, including highs in the low 80`s for the warmest locations. && .DISCUSSION... A frontal band is moving over the Sierra Nevada and is bringing showers and thunderstorms from Yosemite NP to Sequoia/Kings Canyon NP. Expect this activity to continue for the next couple of hours. Isolated to scattered showers and a slight chance (15-20%) of thunderstorms will continue each afternoon and evening for the remainder of this week over the high Sierra. However, chances for precipitation on Thursday and Friday spread into the foothills, though mainly Fresno County northward. Otherwise, expect temperatures to be slightly below average for the next several days as a trough pattern continues over the Pacific Northwest into the Golden State while high pressure builds over the Desert Southwest. Highs will be mainly in the 80`s in both the Central Valley and Kern County desert this week. There is a high probability (75 to near 100 percent) that highs remain below 85 degrees in much of these areas. Over the weekend into early next week, mainly dry conditions prevail with no significant changes in temperatures. Although, highs below 80 degrees in the San Joaquin Valley have a good chance (40-55 percent) of occurrence on Monday into next Tuesday. Low temperatures should overall be pleasant. && .AVIATION... Showers and thunderstorms with mountain obscurations possible over the Sierra Nevada from 19Z Tuesday to 03Z Wednesday. Elsewhere, VFR conditions are expected through 12Z Wednesday. && .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... None. && $$ BSO weather.gov/hanford