Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
228 FXUS66 KHNX 171759 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1059 AM PDT Mon Aug 17 2026 && .KEY MESSAGES... 1. Temperatures will gradually warm this week and rise back to around 5 degrees above average by the middle of the week. The temperatures will back down Friday into the weekend. 2. Breezy conditions take place over typical wind-prone areas including San Luis Reservoir, Lake Isabella and the Mojave Desert Slopes through this week. Lake Wind Advisory through 8 pm tonight for Lake Isabella. && .DISCUSSION... Seasonable temperatures continue today as California is between a trough which is bringing high clouds to the area and a ridge of high pressure over the Southwest. The ridge slowly moves west the next few days which will bring a slight but steady warmup through the week. Triple digits return south of Merced in the Valley with a 60 to 65 percent chance on Wednesday and a 75 to 80 percent chance on Thursday. The Mojave Desert and Indian Wells Valley sees a 55 to 80 percent chance of highs of at least 105 degrees on Wednesday and Thursday. However, monsoon moisture returns to the Sierra Nevada brining thunderstorm chances back up to 5 to 15 percent for the foothills and the Sierra Nevada crest. Temperatures go down over the weekend with Friday having a 40 to 50 percent chance of triple digits and a 15 to 30 percent chance through next Monday in the Valley. The CPC has our area under a 33 to 50 percent chance of above average temperatures in both the 6-10 and 8-14 day outlooks. && .AVIATION... VFR conditions will prevail 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... Lake Wind Advisory until 8 PM PDT this evening for CAZ332. && $$ JPK weather.gov/hanford