Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
842 FXUS66 KHNX 020524 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1020 PM PDT Tue Jul 1 2025 .KEY MESSAGES... 1. Steady triple digit high temperatures are expected through at least Thursday in the San Joaquin Valley and Kern County desert. A possible cooling trend is indicated in the latest model guidance by Friday and next weekend. 2. Dryness is expected to continue through the next week with steady minimum RH`s in the 15 to 25 percent range in the Central Valley and in the single digits for the Kern County desert. Light winds will keep fire risk low. 3. There is a slight (10-20 percent) chance of afternoon and evening thunderstorms in the higher elevations of the Sierra Nevada until Wednesday. && .DISCUSSION... Another hot day is in store today for many valley and desert locations. Highs just above 100 degrees will occur in the Central Valley and the Kern County desert until Thursday. The probability of triple digit readings remains at 35-75 percent for the Kern County desert and 20-50 percent for the SJ Valley during this period. Remember to beat the heat and check the back seat when leaving your vehicles, as we have just entered the typical hottest month of the year. In addition, mountain thunderstorms have the potential to develop this afternoon, although mainly towards the high country of Yosemite NP where there is a 10-15 percent chance. There is a slightly better chance (15-20 percent) as we head into Wednesday, and areas affected include mainly Yosemite NP southward to Sequoia NP. A noticeably cooler holiday weekend, with highs mainly in the 90`s for the Central Valley, also remains likely, although some areas, such as the Kern County desert, may only experience a modest decrease in daytime highs on Independence Day and Saturday, as triple digits persist there. There is also the potential for increased winds in the typical prone areas on Thursday and Independence Day. The best chance for a gust above 40 mph will be towards Mojave and the desert slopes (about 60-90 percent), while gusts of 30 mph can be expected (about a 50-80 percent chance) towards the passes of the coastal ranges, including Pacheco Pass, and the higher terrain adjacent to the west side of the Central Valley. Some advisory level gusts cannot be ruled out, but appear to be localized at this time. For next week, our region will gradually heat back up as high pressure ridging rebuilds. However, we`re not expecting widespread triple digits in the valley to return by this time next week. && .AVIATION... 06Z Update: VFR conditions will prevail for the next 24 hours across the Central California Interior. && .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/CMolina weather.gov/hanford