Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
130 FXUS66 KHNX 241722 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 1022 AM PDT Sat May 24 2025 && .KEY MESSAGES... 1. Temperatures increase on Sunday before cooling on Monday with another warmup beginning Tuesday through the week. 2. There is a 10 to 20 percent chance of thunderstorms in the Sierra Nevada this afternoon and evening 3. Winds pick up late Sunday night into Monday for the Mojave slopes. 4. Humidities improve Sunday and Monday before decreasing Tuesday and holding about 20 percent in the Valley for the remainder of the week. 5. There is a 40 to 50 percent chance of triple digits on Friday for the Valley. && .DISCUSSION... We have cooler temperatures today thanks to a shortwave trough that is in the area but moving east. This trough brings cooler temperatures this afternoon but also a 10 to 20 percent chance of thunderstorms to the Sierra Nevada today. This thunderstorm potential increases the risk of possible fires. We have a small ridge building in on Sunday that will increase temperatures before another shortwave trough moves through on Monday. This second shortwave will cool afternoon highs, improve minimum humidities, but also will bring stronger winds to the area. However, there is a 10 to 20 percent chance of 45 mph wind gusts in the slopes so a Wind Advisory has not been issued but could become an option tomorrow. The increase in winds could also bring Tuesday starts a warming trend to the area for the remainder of the week with even a 40 to 50 percent chance of triple digits in the Valley on Friday. Saturday has a 60 to 70 percent chance of triple digits. However, afternoon wind gusts will also increase after Wednesday in the Valley to be around 10 to 15 mph by Saturday afternoon. The afternoon low humidity is forecast to be around 15 to 20 percent for much of the week. The combination of low humidity, increasing temperatures and wind gusts increase the risk of fire over the week. && .AVIATION... 18Z Update: There is a 10 to 20 percent chance of thunderstorms until 03Z for the Sierra Nevada. Otherwise, VFR conditions will prevail for the next 24 hours across the Central California Interior. && .AIR QUALITY ISSUES... ISSUED: 05/23/2025 14:06 EXPIRES: 05/24/2025 23:59 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 dss....................EW weather.gov/hanford