Area Forecast Discussion
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
871 FXUS66 KSTO 040346 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 846 PM PDT Tue Jun 3 2025 .Discussion... .Synopsis... Elevated fire weather conditions return Wednesday with breezy northerly winds and low humidity. Breezy onshore winds will bring some nighttime cooling into the Delta and adjacent areas. There is a 10-20% chance of isolated mountain shower/thunderstorms each afternoon from Wednesday through Sunday along the Sierra crest mainly south of Highway 50, but no significant impacts are expected at this time. Temperatures trend higher this weekend. && .Key Messages... * Today - Friday: -Elevated fire weather conditions on Wednesday with breezy northerly winds and low humidity -50-80% probability of wind gusts > 30 mph, highest in the northern and central Sacramento Valley and adjacent foothills -Low relative humidity with limited overnight recovery expected as breezy north winds increase this evening -Moderate HeatRisk in the Valley and lower foothills each day -60-90% probability of highs > 95 degrees in the northern/central Sacramento Valley -20-40% probability of highs > 95 degrees in the southern Sacramento Valley, Delta and northern San Joaquin Valley -10-20% probability of thunderstorms Wednesday, Thursday and Friday afternoons along the Sierra crest south of Highway 50 * Saturday - Monday: -Widespread Moderate HeatRisk with localized Major HeatRisk -80-95% probability of highs > 95 degrees in the northern/central Sacramento Valley -30-50% probability of highs > 95 degrees in the southern Sacramento Valley, Delta and northern San Joaquin Valley -10-20% probability of thunderstorms Saturday and Sunday afternoons in the mountains, best chances south of Highway 50 && .AVIATION... VFR conditions prevail over interior NorCal next 24 hours. Northerly surface winds around 10-15 kts, with gusts 20-30 kts over the Northern and Central Sacramento Valley with west to southwest winds in the Delta vicinity. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$