131 FXUS66 KSTO 082023 AFDSTO Area Forecast Discussion National Weather Service Sacramento CA 123 PM PDT Tue Jul 8 2025 .DISCUSSION... .SYNOPSIS... Mostly dry with near seasonable high temperatures today in the Valley. Widespread moderate HeatRisk is anticipated across the Valley starting Thursday, and portions of the northern Sacramento Valley will hit triple-digit highs through the weekend. Breezy winds combined with low humidity will lead to areas of elevated fire weather concerns in Shasta County through the weekend. && .KEY MESSAGES... * Today-Thursday: - Smoke from the Green wildfire visible on satellite, southerly winds continuing to move the plume north of Redding this afternoon - Offshore low is continues to promote periods of breezy southerly winds across the area today. - Continued dry and mostly clear weather today, with a warming trend starting on Wednesday as high pressure begins to build in the Desert SW/Four Corners region. - On Thursday, trough exits the area, ridge continues to build in the Desert SW, promotes a period of breezy northerly winds. - Highest gusts around 15-25 mph in the typically wind-prone areas of the Valley - Areas of elevated fire weather concerns in Shasta County into the weekend, due to low humidities and periods of breezy winds * Friday-Monday: - Continued warming, with widespread Moderate HeatRisk in the forecast for interior NorCal. Triple-digit highs in the northern and central Sacramento Valley and northern San Joaquin Valley Thursday - Sunday. - Upper level ridging looks to continue dominating our pattern into next week .Changes from previous forecast... - No significant changes to the forecast && .AVIATION... VFR conditions across interior NorCal next 24 hours. Periods of breezy onshore winds with gusts up to 15-20 knots in the Delta vicinity through 12z Wednesday, then gusts up to 15 kts. Breezy southerly/southwesterly wind gusts in the Sacramento Valley and northwesterly wind gusts in the northern San Joaquin Valley up to 15-20 kts until 06z Wednesday. Local MVFR conditions possible at times in HZ/FU vicinity of Shasta County wildfire, including KRDD. && .STO WATCHES/WARNINGS/ADVISORIES... None. && $$