Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
064 FXUS66 KHNX 011709 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1009 AM PDT Fri Aug 1 2025 && .KEY MESSAGES... 1. Near average temperatures are expected across much of the region into the weekend. There is a 20 to 50 percent chance to exceed 100 degrees in the San Joaquin Valley today and Saturday. 2. Increased fire risk this weekend with widespread minimum relative humidity between 15 and 25 percent for the non-desert areas. Min RH expected less than 10 percent in the Mojave Desert with gusty winds in the afternoon to evening. 3. Slight cooling trend early next week before returning above triple digits. 10 to 30 percent chance for greater than 105 degrees in the San Joaquin Valley next Friday. && .DISCUSSION... Temperatures remain seasonable today with a 20 to 50 percent chance of triple digits mostly in Fresno and points south thanks to a ridge of high pressure over much of the Continental US. However, latest ensembles agree a trough slides in on Monday across Northern California and the Pacific Northwest bringing a slight cooldown. Tuesday brings a rebound in temperatures followed by a return of triple digits the rest of the week where we have a 25 to 55 percent chance of triple digits on Wednesday before a 45 to 90 percent chance on Thursday and Friday. There is a 10 to 30 percent chance of highs of at least 105 on Friday in the Valley. Thunderstorm chances are very minimal for the Sierra Nevada. However, humidities will remain low across the region with the Valley and foothills at 15 to 25 percent for the next several days while the Mojave Slopes and Desert are below 10 percent. This combined with afternoon wind gusts increasing every day this weekend leads to a minor fire risk to our area. However, the risk is higher but still minor along the Mojave Slopes due to the higher winds and probability of 40 mph wind gusts daily. The Mojave Desert also has the slightly higher risk due to max wind gusts around 25 mph in the evening. && .AVIATION... 18Z Update: VFR conditions are expected in the San Joaquin Valley for the next 24 hours. && .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. && $$ public/aviation.....JPK idss/pio.....Molina weather.gov/hanford