Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
985 FXUS66 KSTO 110930 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 230 AM PDT Sun Aug 11 2024 .SYNOPSIS... Cooler temperatures and locally breezy at times this week. && .Discussion... Overall little change as high pressure maintains its grip. Some mid and high clouds continue to move up from the southwest, but skies remain mostly clear. Current temperatures are relatively unchanged compared to 24 hours ago except across portions of the Sacramento Valley where readings are slightly milder due to a slackening of the Delta Breeze. Humidity is lower (around 5-15%) in most areas compared to early Saturday. High pressure will weaken across the region early this week as a weak trough sags down into NorCal from the PacNW. Temperatures will begin to cool today, with more substantial cooling spreading across the region beginning Monday as onshore flow increases, and high temperatures will actually be a little below average. It`ll also be locally breezy at times as the transition to onshore flow takes place, but humidity will also gradually rise. A stronger short-wave is forecast to move across NorCal on Monday which may bring some sprinkles or light showers, but otherwise the dry pattern will continue. && .EXTENDED DISCUSSION (Thursday THROUGH Sunday)... Short wave trough/low progged across northern portions of CA on Thursday with main light precip threat remaining north of our CWA. Another upper low then progged to dig S off the W Coast Friday. Models differ with how progressive this feature will be but either scenario shows continued synoptic cooling over the area into the weekend as heights/thicknesses trend down. Dry weather with below normal high temperatures expected through the extended period with 80s in the Central Valley and 60s to low 80s for the mountains and foothills. && .AVIATION... VFR conditions over interior NorCal next 24 hrs except isolated MVFR in HZ/FU possible at times in vcnty of fires. Areas of S-W sfc wind up to 15 kts possible in Central Vly btwn 20z-03z otherwise wind below 12 kts. Vcnty of Delta, SWly sfc wind 15-25 kts at times. && .STO WATCHES/WARNINGS/ADVISORIES...None. && $$