Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
Issued by NWS San Joaquin Valley, CA
852 FXUS66 KHNX 032321 AFDHNX Area Forecast Discussion National Weather Service Hanford CA 421 PM PDT Thu Apr 3 2025 .UPDATE... No changes to the aviation discussion. && .KEY MESSAGES... 1. There is a chance of mountain showers and isolated mountain thunderstorms through this evening. 2. Dry weather will prevail and a warming trend will take place Friday through the weekend. 3. Temperatures will lower a bit on Monday then rise to well above normal by the middle of next week. && .DISCUSSION... A cool northerly flow behind a strong upper trough over the Great Basin is maintaining cool and unsettled weather across our area today with below normal temperatures and some upslope clouds over the south end of the San Joaquin Valley and the valley facing slopes of the Tehachapi mountains. While the low clouds have been mixing out, increased instability over the mountains and foothills this afternoon and evening will result in a chance of showers and a slight chance of thunderstorms over the higher elevations. As the trough continues to drop southeast and away from our area, skies will clear out overnight. SREF is showing an upper ridge amplifying near 130W on Friday which will then shift inland in CA this weekend resulting a rising heights and thicknesses across our area which will bring a noticable warming trend to our area with daytime temperatures rising to near seasonal normals on Friday and to above normal levels by Saturday with continued warming anticipated for Sunday under mainly clear skies. Ensemble means are showing a trough moving across the PAC NW on Monday which will bring slightly cooler temperatures to our area on Monday before the ridge rebuilds during the mid-week period resulting in much above normal temperatures across our area on Wednesday and Thursday along with continued dry weather. && .AVIATION... 00Z: Over the Sierra Nevada, Sierra Foothills and Tehachapi mountains, areas of MVFR in low clouds and showers with local mountain obscuring IFR in low clouds and a slight chance of thunderstorms thru 06Z Fri. Mainly VFR between 06Z Fri and 00Z Sat. Elsewhere across the central CA interior, VFR conditions will prevail. && .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. && $$ Aviation....Molina weather.gov/hanford