November 15, 2026 – Here are the overnight forecast highlights:

Winter Weather Advisory: 4 PM today, Nov. 15 – 10 PM Monday, Nov. 16 for Sierra/southern Cascades/Lassen Park above 6000’. Midweek storm continues to trend stronger. Increasing potential for active weather to continue next weekend into Thanksgiving Week.

Today-Monday

Precipitation forecast for Sunday–Monday, Nov 15–16, 2026, in Northern California: mostly 0.25–1.5 inches, minor impact, snow levels 5000–7000 ft
  • Widespread rainfall, mountain snow, breezy south winds
  • Lower precipitation/snow amounts compared to previous storm
  • Gusty winds, but not as strong
  • Winter Weather Advisory from 4 PM today through 10 PM Monday for elevations above 6000 ft
  • Moderate snow may impact travelers as well as the Monday AM/PM commutes
  • Snow amounts have increased slightly, totals 2-7″, up to 16″ over Lassen National Park
  • Rates generally 0.5″-1″ per hour
Moderate snow forecast graphic from NWS Sacramento: 2-7 inches above 6000 feet, up to 16 inches at Lassen Peak, 4 PM Sun to 10 PM Mon, Nov 15-16, 2026; map highlights Sierra Nevada; impacts include slippery roads and chain controls

Tuesday night -Thursday

NWS Sacramento forecast maps for Nov 18-19, 2026 comparing low-end and high-end 48-hour rain totals in Northern California. Low end is mostly under 1.5 inches; high end reaches 2 to 3 inches in the north and Sierra, showing uncertainty
National Weather Service graphic comparing low-end and high-end 48-hour snowfall forecasts for Northern California, Nov 18-19, 2026. The Sierra Nevada crest gets the most snow: about 10 inches near South Lake Tahoe in the low-end case and 25 to 37 inches in the high-end case. Valley areas get none
  • Confidence in a strong, wet storm mid-week is high
  • Rainfall and snow amounts have trended significantly higher
  • Current snowfall forecast is 1 to 3 feet above 6000 feet for the southern Cascades and Sierra, with several inches of snow across down to around 4000 feet
  • Rainfall totals currently 2-4″ in the mountains and foothills, 1-3″ in the Valley
  • Winds have trended stronger, with gusts up to 40 to 50 mph in the Valley and Delta
NWS Sacramento wind forecast for Wednesday: moderate impact, southerly winds, gusts mostly 25-45 mph across Northern California, up to 50 mph near San Francisco
Mid-week storm precipitation forecast for Northern California, Nov 18-19, 2026: minor impact, mostly 1 to 4 inches of rain, snow levels 4000 to 6000 feet. Full details are in the graphic text

Friday – Weekend

  • Lingering showers Friday. Potential for active pattern into the weekend