Dry weather and warming temperatures continue through the remainder of the week with slight chances for isolated mountain showers/thunderstorms this afternoon. Areas of Moderate HeatRisk in the Valley on Thursday will become widespread with areas of Major HeatRisk in the Valley and foothills on Friday and Saturday.
Elevated fire weather conditions are also expected Friday and Saturday as well. Slightly cooler high temperatures are expected on Sunday and into early next week as a weather system drops into the region bringing breezy winds, chances for isolated showers/thunderstorms, and the potential for additional fire weather conditions.
Heat Advisory in effect from 11 AM Friday to 8 PM Saturday for Valley, Delta, and foothills.
Today – Thursday:
Warming trend, with areas of Moderate HeatRisk expected in the Valley on Thursday.
Probability of Valley high temperatures > 95F:
30-70%, highest across northern/central Sacramento Valley.
Slight chance (10%) of isolated mountain thunderstorms this afternoon and early evening, primarily south of Interstate 80.
Friday – Saturday:
Triple digit heat anticipated in the Valley and foothills late this week with near to record high temperatures possible on Friday. Major Risk for heat-related illnesses for pets, livestock, and much of the population, especially anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure. Cold and fast moving area waterways.
- Widespread Moderate HeatRisk with areas of Major HeatRisk in the Valley and foothills.
- Probability of Valley high temperatures > 100F:
- Friday: 60-95%, highest north of Interstate 80.
Saturday: 50-90%, highest away from Delta breeze influenced areas. - Limited overnight relief expected across the northern/central Sacramento and northern San Joaquin Valleys and thermal belts across the foothills.
- Probability of Valley low temperatures Friday night > 65F: 50-95%, highest north of I-80.
Hot temperatures along with very low humidity and periodically breezy winds will lead to elevated fire weather conditions.
Sunday – Tuesday:
Cooling trend expected late weekend into early next week associated with an approaching weather system.
High uncertainty in the track of the system at this time, with the potential for elevated fire weather conditions in periods of breezier winds.
Some isolated thunderstorm potential on Monday and Tuesday, best chances (around 10-20%) along the Sierra crest.