Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
733 FXUS66 KSTO 110930 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 230 AM PDT Sat May 11 2024 .SYNOPSIS... High pressure will bring dry weather with above normal temperatures into next week resulting in areas of moderate heat risk. && .DISCUSSION... There were some cumulus buildups in the Sierra to the south of Lake Tahoe late Friday afternoon and evening on the backside of the low centered over southern Nevada. Otherwise, skies remain clear under high pressure across interior NorCal early this morning. Offshore/northeast surface pressure gradient has relaxed a bit further compared to 24 hours ago, but a few gusts in the 15-25 mph range remain over the foothills and mountains. Current temperatures remain mild and mostly range from the mid 30s to mid 40s in the colder mountain valleys, to the 50s over mountain ridges, and mainly 60s to around 70 in the Central Valley. Little change is expected through early next week with high pressure resulting in dry and warm weather with temperatures around 10 degrees above average. Warmest temperatures in the Central Valley will be in the lower to mid 90s resulting in areas of moderate heat risk. A weak trough is forecast to move across NorCal on Monday and may be enough to trigger isolated late day showers and thunderstorms over the northern Sierra, but otherwise is not expected to have much impact other than bringing minor cooling to the Delta and southern Sacramento Valley as the Delta Breeze picks up. && .EXTENDED DISCUSSION (Wednesday THROUGH Saturday)... EPAC upper ridge extends inland over interior NorCal midweek. Ridge progged to flatten towards the end of the week as upstream short wave troughs encounter it. This will result in a cooling trend, but high temperatures remain above normal through the extended forecast period with dry weather. && .AVIATION... VFR conditions over interior NorCal next 24 hrs with sfc wind mainly below 12 kts. && .STO WATCHES/WARNINGS/ADVISORIES...None. && $$