Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
461 FXUS66 KSTO 282100 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 200 PM PDT Thu Aug 28 2025 .DISCUSSION... .SYNOPSIS... Seasonable high temperatures continue through Friday. Temperatures trend above average for the weekend into next week, with some areas of Moderate HeatRisk developing. Dry weather is expected except a slight chance of afternoon showers and thunderstorms along the Sierra crest south of US Highway 50. && .KEY MESSAGES... * Today - Friday: - High temperatures will be seasonable, with mostly mid 90s in the Valley; cooler mid to upper 80s to low 90s in the Delta. Minor HeatRisk across interior NorCal. - PacNW low builds off coast; enhances onshore flow and ushers in a slight (10%<) chance of an afternoon shower/t-storm in the far eastern corner of Tuolumne County, dry conditions elsewhere Saturday - Wednesday - High temperatures mainly in the upper 90s to low 100s across the Valley and Delta - Warmest temperatures are expected on Wednesday, with widespread triple digit highs, along with widespread Moderate HeatRisk and local areas of Major HeatRisk - Minor drying brings lower relative humidity, especially to the northern Sacramento Valley, where daytime RHs in the mid-teens are forecast - a slight (15-20%) chance of afternoon showers/thunderstorms for the Sierra crest from US Highway 50 southward .Changes from previous forecast... - Temperatures for next week are trending higher && .AVIATION... VFR conditions with clear skies are expected through the TAF period, except for some afternoon cumulus buildups over the Sierra crest. Winds will be generally 10kt or less. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$