Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
834 FXUS66 KHNX 291800 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1100 AM PDT Sun Jun 29 2025 && .KEY MESSAGES... 1. Steady triple digit high temperatures are expected through at least Thursday in the Valley and Desert. A possible cooling trend is being model indicated 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 Valley and in the single digits for the Desert. Light winds will keep fire risk low. && .DISCUSSION... Broad high pressure continues to dominate the region today, with high temperatures reaching a few degrees above triple digits in the Valley. As we move into the work week, a weak trough is expected to form offshore in the Pacific Ocean. This trough is expected to slowly move onshore in the next several days, causing a gradual cooling for the region as marine air becomes slightly more prevalent in the Valley. Triple digits will slowly become less widespread until Friday, where the upper 90`s dominates and triple digits are not likely. These highs are likely to remain steady through next weekend. Minimum relative humidities continue to be fairly dry in the Valley with values in the 15 to 25 percent range, and the desert seeing single digits. Though the Valley may see a slight increase in RH`s by Friday as temperatures in the afternoons cool, with values mainly in the northern Valley in the upper 20`s and approaching 30%. This trough may also lead to slightly stronger winds along the desert slopes, though with the limited energy the trough has, the current wind gusts along the slopes remain below Wind Advisory criteria. && .AVIATION... 18Z 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 medium. 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/Fire Weather....EW DSS/PIO.........................CM weather.gov/hanford